CASE CX40B MINI EXCAVATOR Service Repair Manual

CX40B
CX50B
1 SPECIFICATIONS
2 MAINTENANCE
3 SYSTEM
4 DISASSEMBLING
5 TROUBLESHOOTING
6 ENGINE
7
INSTALLATION PROCEDURES FOR
OPTIONAL ATTACHMENT
8 SUPPORTING DATA
SHOP
MANUAL
INDEX
HYDRAULIC EXCAVATOR
No. 9-91940 GB Printed by Studio ti - 22204 - 2004.07
model

SAFETY PRECAUTIONS
0-2
GENERAL SAFETY INFORMATION
SWARNING
Do not operate or perform any maintenance on this
machine until all instructions found in the OPERA-
TION & MAINTENANCE MANUAL have been thor-
oughly read and understood.
Improper operation or maintenance of this machine
may cause accidents and could result in serious in-
jury or death.
Always keep the manual in storage.
If it is missing or damaged, place an order with an
authorized our Distributor for a replacement.
If you have any questions, please consult an au-
thorized our Distributor.
(1) Most accidents, which occur during operation, are
due to neglect of precautionary measures and safe-
ty rules. Sufficient care should be taken to avoid
these accidents. Erroneous operation, lubrication
or maintenance services are very dangerous and
may cause injury or death of personnel. Therefore
all precautionary measures, NOTES, DANGERS,
WARNINGS and CAUTIONS contained in the man-
ual and on the machine should be read and under-
stood by all personnel before starting any work with
or on the machine.
(2) Operation, inspection, and maintenance should be
carefully carried out, and safety must be given the
first priority. Messages of safety are indicated with
marks. The safety information contained in the
manual is intended only to supplement safety
codes, insurance requirements, local laws, rules
and regulations.
(3) Messages of safety appear in the manual and on
the machine: All messages of safety are identified
by either word of "DANGER", "WARNING" and
"CAUTION".
1) DANGER- Indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury and is represented as
follows:
SDANGER
2) WARNING- Indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury and is represented as
follows:
SWARNING
3) CAUTION- Indicates a potentially hazardous
situation which, if not avoided, may result in mi-
nor or moderate injury. It may also be used to
alert against possible damage to the machine
and its components and is represented as fol-
lows:
SCAUTION
(4) It is very difficult to forecast every danger that may
occur during operation. However, safety can be en-
sured by fully understanding proper operating pro-
cedures for this machine according to methods
recommended by Manufacturer.
(5) While operating the machine, be sure to perform
work with great care, so as not to damage the ma-
chine, or allow accidents to occur.
(6) Continue studying the manual until all Safety, Oper-
ation and Maintenance procedures are completely
understood by all persons working with the ma-
chine.

SAFETY PRECAUTIONS
0-3
SAFETY PRECAUTIONS
SWARNING
The proper and safe lubrication and maintenance
for this machine, recommended by Manufacturer,
are outlined in the OPERATOR’S MANUAL for the
machine.
Improper performance of lubrication or mainte-
nance procedures are dangerous and could result
in injury or death. Read and understand the MAN-
UAL before performing any lubrication or mainte-
nance.
The serviceman or mechanic may be unfamiliar
with many of the systems on this machine. This
makes it important to use caution when perform-
ing service work. A knowledge of the system and or
components is important before the removal or dis-
assembly of any component.
Because of the size of some of the machine compo-
nents, the serviceman or mechanic should check the
weights noted in this manual. Use proper lifting proce-
dures when removing any components. Weight of com-
ponents table is shown in the section:
SPECIFICATIONS.
The following is a list of basic precautions that must al-
ways be observed.
(1) Read and understand all Warning plates and de-
cal on the machine before Operating, Maintaining
or Repairing this machine.
(2) Always wear protective glasses and protective
shoes when working around machines. In partic-
ular, wear protective glasses when using ham-
mers, punches or drifts on any part of the machine
or attachments. Use welders gloves, hood/gog-
gles, apron and the protective clothing appropriate
to the welding job being performed. Do not wear
loose fitting or torn clothing. Remove all rings from
fingers, loose jewelry, confine long hair and loose
clothing before working on this machinery.
(3) Disconnect the battery and hang a "Do Not Oper-
ate" tag in the Operators Compartment. Remove
ignition keys.
(4) If possible, make all repairs with the machine
parked on a level, hard surface. Block the ma-
chine so it does not roll while working on or under
the machine. Hang a "Do Not Operate" tag in the
Operators Compartment.
(5) Do not work on any machine that is supported only
by lift, jacks or a hoist. Always use blocks or jack
stands, capable of supporting the machine, before
performing any disassembly.
SWARNING
Do not operate this machine unless you have
read and understand the instructions in the
OPERATOR’S MANUAL. Improper machine
operation is dangerous and could result in in-
jury or death.
(6) Relieve all pressure in air, oil or water systems be-
fore any lines, fittings or related items are discon-
nected or removed. Always make sure all raised
components are blocked correctly and be alert for
possible pressure when disconnecting any device
from a system that utilizes pressure.
(7) Lower the bucket, dozer, or other attachments to
the ground before performing any work on the ma-
chine. If this cannot be done, make sure the buck-
et, dozer, ripper or other attachment is blocked
correctly to prevent it from dropping unexpectedly.
(8) Use steps and grab handles when mounting or
dismounting a machine. Clean any mud or debris
from steps, walkways or work platforms before us-
ing. Always face to the machine when using
steps, ladders and walkways. When it is not pos-
sible to use the designed access system, provide
ladders, scaffolds, or work platforms to perform
safe repair operations.
(9) To avoid back injury, use a hoist when lifting com-
ponents which weigh 20 kg (45 lbs) or more. Make
sure all chains, hooks, slings, etc., are in good
condition and are the correct capacity. Be sure
hooks are positioned correctly. Lifting eyes are
not to be side loaded during a lifting operation.
(10) To avoid burns, be alert for hot parts on machines
which have just been stopped and hot fluids in
lines, tubes and compartments.
(11) Be careful when removing cover plates. Gradually
back off the last two capscrews or nuts located at
opposite ends of the cover or device and carefully
pry cover loose to relieve any spring or other pres-
sure, before removing the last two capscrews or
nuts completely.
(12) Be careful when removing filler caps, breathers
and plugs on the machine. Hold a rag over the
cap or plug to prevent being sprayed or splashed
by liquids under pressure. The danger is even
greater if the machine has just been stopped be-
cause fluids can be hot.
(13) Always use the proper tools that are in good con-
dition and that are suited for the job at hand. Be

SAFETY PRECAUTIONS
0-4
sure you understand how to use them before per-
forming any service work.
(14) Reinstall all fasteners with the same part number.
Do not use a lesser quality fastener if replace-
ments are necessary.
(15) Repairs which require welding should be per-
formed only with the benefit of the appropriate ref-
erence information and by personnel adequately
trained and knowledgeable in welding proce-
dures. Determine type of metal being welded and
select correct welding procedure and electrodes,
rods or wire to provide a weld metal strength
equivalent at least to that of the parent metal.
Make sure to disconnect battery before any weld-
ing procedures are attempted.
(16) Do not damage wiring during removal operations.
Reinstall the wiring so it is not damaged nor will be
damaged in operation of the machine by contact-
ing sharp corners, or by rubbing against some ob-
ject or hot surface. Do not connect wiring to a line
containing fluid.
(17) Be sure all protective devices including guards
and shields are properly installed and functioning
correctly before starting a repair. If a guard or
shield must be removed to perform the repair
work, use extra caution and replace the guard or
shield after repair is completed.
(18) The maintenance and repair work while holding
the bucket raised is dangerous due to the possibil-
ity of a falling attachment. Don’t fail to lower the at-
tachment and place the bucket to the ground be-
fore starting the work.
(19) Loose or damaged fuel, lubricant and hydraulic
lines, tubes and hoses can cause fires. Do not
bend or strike high pressure lines or install ones
which have been bent or damaged. Inspect lines,
tubes and hoses carefully. Do not check for leaks
with your hands. Very small (pinhole) leaks can re-
sult in a high velocity oil stream that will be invisi-
ble close to the hose. This oil can penetrate the
skin and cause personal injury. Use card-board or
paper to locate pinhole leaks.
(20) Tighten connections to the correct torque. Make
sure that all heat shields, clamps and guards are
installed correctly to avoid excessive heat, vibra-
tion or rubbing against other parts during opera-
tion. Shields that protect against oil spray onto hot
exhaust components in event of a line, tube or
seal failure must be installed correctly.
(21) Do not operate a machine if any rotating part is
damaged or contacts any other part during opera-
tion. Any high speed rotating component that has
been damaged or altered should be checked for
balance before reusing.
(22) Be careful when servicing or separating the tracks
(crawlers). Chips can fly when removing or install-
ing a track (crawlers) pin. Wear safety glasses and
long sleeve protective clothing. Tracks (crawlers)
can unroll very quickly when separated. Keep
away from front and rear of machine. The ma-
chine can move unexpectedly when both tracks
(crawlers) are disengaged from the sprockets.
Block the machine to prevent it from moving.

SAFETY PRECAUTIONS
0-5
INDEX CX40B
CX50B
Title Index
No.
SPECIFICATIONS
OUTLINE 1
SPECIFICATIONS 2
ATTACHMENT DIMENSIONS 3
MAINTENANCE
TOOLS 11
STANDARD MAINTENANCE TIME TABLE 12
MAINTENANCE STANDARDS AND TEST PROCEDURES 13
SYSTEM
HYDRAULIC SYSTEM 22
ELECTRICAL SYSTEM 23
COMPONENTS SYSTEM 24
DISASSEMBLING
WHOLE DISASSEMBLING & ASSEMBLING 31
ATTACHMENTS 32
UPPER SLEWING STRUCTURE 33
TRAVEL SYSTEM 34
TROUBLESHOOTING
HYDRAULIC SYSTEM 42
ELECTRICAL SYSTEM 43
ENGINE
44
E/G
ENGINE 51
OPT.DATA
SUPPORTING DATA 71
APPLICABLE MACHINES

1. OUTLINE
TABLE OF CONTENTS
1.1 GENERAL PRECAUTIONS FOR REPAIRS .....................................................1-3
1.1.1 PREPARATION BEFORE DISASSEMBLING ..............................................1-3
1.1.2 SAFETY IN DISASSEMBLING AND ASSEMBLING ....................................1-3
1.1.3 DISASSEMBLING AND ASSEMBLING HYDRAULIC EQUIPMENT ............1-3
1.1.4 ELECTRICAL EQUIPMENT ..........................................................................1-4
1.1.5 HYDRAULIC PARTS .....................................................................................1-5
1.1.6 WELDING REPAIR .......................................................................................1-5
1.1.7 ENVIRONMENTAL MEASURE .....................................................................1-5
1.2 INTERNATIONAL UNIT CONVERSION SYSTEM ............................................1-6

1. OUTLINE
1-3
1.1 GENERAL PRECAUTIONS FOR
REPAIRS
1.1.1 PREPARATION BEFORE DISASSEM-
BLING
(1) Understanding operating procedure
Read OPERATION & MAINTENANCE MANUAL
carefully to understand the operating procedure.
(2) Cleaning machines
Remove soil, mud, and dust from the machine be-
fore carrying it into the service shop to prevent loss
of work efficiency, damage of parts, and difficulty in
rust prevention and dust protection while reassem-
bling.
(3) Inspecting machines
Identify the parts to be disassembled before start-
ing work, determine the disassembling procedure
by yourself considering the workshop situations
etc., and request procurement of necessary parts in
advance.
(4) Recording
Record the following items for communication and
prevention of recurring malfunction.
1) Inspection date and place.
2) Model name, applicable machine number, and
hour meter read.
3) Trouble condition, place and cause.
4) Visible oil leakage, water leakage and damage.
5) Clogging of filters, oil level, oil quality, oil con-
tamination and loosening of connections.
6) Result of consideration if any problem exists
based on the operation rate per month calculat-
ed from hour meter indication after the last in-
spection date.
(5) Arrangement and cleaning in service shop
1) Tools required for repair work.
2) Prepare space to place the disassembled parts.
3) Prepare oil containers for draining oil etc.
1.1.2 SAFETY IN DISASSEMBLING AND AS-
SEMBLING
(1) Wear appropriate clothes with long sleeves, safety
shoes, safety helmet and protective glasses.
(2) Suspend warning tag "DO NOT OPERATE" from
the doorknob or the operating lever, and have a
preliminary meeting before starting work.
(3) Stop the engine before starting inspection and
maintenance to prevent the operator being caught
in machine.
(4) Identify the location of a first-aid kit and a fire extin-
guisher, and also where to make contact in a state
of emergency.
(5) Choose a hard, level and safe place, and place the
attachment on the ground securely.
(6) Use a lifter such as a crane to remove heavy parts
(20 kg [45 lbs] or more) from the machine.
(7) Use proper tools, and replace or repair defective
tools.
(8) Support the machine and attachment with supports
or blocks if the work is performed in the lifted condi-
tion.
1.1.3 DISASSEMBLING AND ASSEMBLING HY-
DRAULIC EQUIPMENT
(1) Removing hydraulic equipment
1) Before disconnecting pipes, release the hy-
draulic pressure of the system, or open the re-
turn side cover and take out the filter.
2) Carefully drain oil of the removed pipes into a
containers without spilling on the floor.
3) Apply plugs or caps on the pipe ends to avoid
oil spillage and dust intrusion.
4) Clean off the external surface of the equipment
before disassembling, and drain hydraulic and
gear oil before placing it on the workbench.
(2) Disassembling hydraulic equipment
1) Do not disassemble, reassemble or modify the
hydraulic equipment without the permission of
the manufacturer, who is not responsible for the
performance and function of the product after
modification.
2) When disassembling and reassembling for un-
avoidable reason, refer the work to qualified
personnel who have the specific knowledge or
completed the parts service training.
3) Provide matching marks to facilitate reassem-
bling work.
4) Before starting the work, read the manual of
disassembling procedure, if it is provided, and
decide whether the work can be performed by
yourself.

1. OUTLINE
1-4
5) Use the special jig and tools without fail if they
are specified.
6) If it is hard to remove a part according to the
procedure, do not try it by force but investigate
the cause.
7) Place the removed parts in order and attach
tags to facilitate the reassembling.
8) Note the location and quantity of parts com-
monly applied to multiple locations.
(3) Inspecting parts
1) Ensure that the disassembled parts are free
from seizure, interference and uneven contact.
2) Measure and record wear condition of parts
and clearance.
3) If the problem is found in a part, repair or re-
place it with a new one.
(4) Reassembling hydraulic equipment
1) Turn ON the ventilation fan or open windows to
maintain good ventilation prior to starting the
cleaning of parts.
2) Perform rough and finish cleaning before as-
sembling.
3) Remove washing oil by air and apply clean hy-
draulic or gear oil for assembling.
4) Always replace the removed O-rings, backup
rings and oil seals with new ones by applying
grease in advance.
5) Remove dirt and moisture from and perform de-
greasing on the surface where liquid gasket to
be applied.
6) Remove rust preventive agent from the new
parts before use.
7) Fit bearings, bushings and oil seals using spe-
cial jigs.
8) Assemble the parts utilizing matching marks.
9) Ensure all the parts are completely assembled
after the work.
(5) Installing hydraulic equipment
1) Ensure hydraulic oil and lubricant are properly
supplied.
2) Perform air bleeding when:
1. Hydraulic oil changed
2. Parts of suction side piping replaced
3. Hydraulic pump installed
4. Slewing motor installed
5. Travel motor installed
6. Hydraulic cylinder installed
SWARNING
Operation of the hydraulic equipment with-
out filling hydraulic oil or lubricant or with-
out performing air bleeding will result in
damage to the equipment.
3) Perform air bleeding of the hydraulic pump and
slewing motor after loosening the upper drain
plug, starting the engine and keep it in low idle
condition.
Complete the air bleeding when seeping of hy-
draulic oil is recognized, and tightly plug.
4) Perform air bleeding of the travel motor and the
hydraulic cylinders by running the engine for
more than 5 minutes at low speed without load.
SWARNING
Do not allow the hydraulic cylinder to bot-
tom on the stroke end just after the mainte-
nance.
5) Perform air bleeding of pilot line by performing
a series of digging, slewing and travel.
6) Check hydraulic oil level after placing the at-
tachment to the oil check position, and replen-
ish oil if necessary.
1.1.4 ELECTRICAL EQUIPMENT
(1) Do not disassemble electrical equipment.
(2) Handle it carefully not to drop and give a shock.
(3) Turn the key OFF prior to connecting and discon-
necting work.
(4) Disconnect the connector by holding it and press-
ing the lock. Do not pull the wire to apply force to the
caulking portion.
(5) Connect the connector and ensure it is completely
locked.
(6) Turn the key OFF prior to touching the terminal of
starter or generator.
(7) Remove the ground (earth) terminal of battery
when handling tools around the battery or its relay.
(8) Do not splash water on the electrical equipment
and connectors during machine washing.
(9) Check for moisture adhesion inside the waterproof
connector after pulling it out, since it is hard to re-
move moisture from the connector.

1. OUTLINE
1-5
If moisture adhesion is found, dry it completely be-
fore the connection.
SWARNING
Battery electrolyte is hazardous.
Battery electrolyte is dilute sulfuric acid. Exposure
of skin or eyes to this liquid will cause burning or
loss of eyesight.
If the exposure occurs, take the following emergen-
cy measures and seek the advice of a medical spe-
cialist.
• When skin exposed:
Wash with water and soap sufficiently.
• When eyes exposed:
Immediately wash away with city water continu-
ously for more than 10 minutes.
• When a large amount of the liquid flows out:
Neutralize with sodium bicarbonate or wash
away with city water.
• When swallowed:
Drink a large amount of milk or water.
• When clothes exposed:
Immediately undress and wash.
1.1.5 HYDRAULIC PARTS
(1) O-ring
• Ensure O-rings have elasticity and are not dam-
aged before use.
• Use the appropriate O-rings. O-rings are made
of various kinds of materials having different
hardness to apply to a variety of parts, such as
the part for moving or fixed portion, subjected to
high pressure, and exposed to corrosive fluid,
even if the size is same.
• Fit the O-rings without distortion and bend.
• Always handle floating seals as a pair.
(2) Flexible hose (F hose)
• Use the appropriate parts. Different parts are
used depending on the working pressure even
the size of fitting and the total length of the hose
is same.
• Tighten the fitting at the specified torque.
Ensure no kink, tension, interference nor oil
leakage is recognized.
1.1.6 WELDING REPAIR
(1) Refer repair welding to qualified personnel accord-
ing to the appropriate procedure.
(2) Disconnect the ground (earth) cable of the battery
before starting the repair.
Failure to do so will cause damage to the electrical
equipment.
(3) Move away the articles in advance that may cause
fire if exposed to sparks.
(4) Before starting the repair of the attachment, do not
fail to cover the plated surface of the piston rod with
flameproof sheet to prevent it from being exposed
to sparks.
1.1.7 ENVIRONMENTAL MEASURE
(1) Run the engine at the place that is sufficiently ven-
tilated.
(2) Industrial waste disposal
Dispose of the following parts according to the rel-
evant regulations:
Waste oil and waste container
Battery
(3) Precautions for handling hydraulic oil
Exposure of eyes to hydraulic oil will cause inflam-
mation. Wear protective glasses before handling to
avoid an accident. If an eye is exposed to the oil,
take the following emergency measures:
• When an eye exposed:
Immediately wash away with city water suffi-
ciently till stimulative feeling vanishes.
• When swallowed:
Do not let vomit, and receive medical treatment
immediately.
• When skin exposed:
Wash with water and soap sufficiently.
(4) Others
Use replacement parts and lubricants authorized as
the genuine parts.

1. OUTLINE
1-6
1.2 INTERNATIONAL UNIT CON-
VERSION SYSTEM
(Based on MARKS’ STANDARD
HANDBOOK FOR MECHANI-
CAL ENGINEERS)
Introduction
Although this manual includes International System of
Unit and Foot-Pound System of Units, if you need SI
unit, refer to the following international system of units.
Given hereinafter is an excerpt of the units that are re-
lated to this manual.
1. Etymology of SI Unites
French: Le Systeme International d’ Unites
English: International System of Units
2. Construction of SI Unit System
(1) Base units
(2) Supplementary units
(3) Derived Units
(4) Derived Units bearing Peculiar Designations
Table 1-1
QUANTITY UNIT SYMBOL
Length meter m
Mass kilogram kg
Time second s
Electric current ampere A
Thermodynamic
temperature
kelvin K
Amount of
substance
mol mol
Luminous
intensity
candela cd
Table 1-2
Plane angle radian rad
Solid angle steradian sr
Base units
Table 1-1
Derived units
of base units
Table 1-2
Supplemen-
tary units
Table 1-2
Derived
units
Derived units
bearing peculiar
designations
Table 1-4
Prefixes of SI
(n-th power of 10, where n is an integer)
Table 1-5
SI units
SI unit
system
Table 1-3
Area square meter m2
Volume cubic meter m3
Velocity meter per second m/s
Acceleration meter per second squared m/s2
Density kilogram per cubic meter kg/m3
Table 1-4
QUANTITY UNIT SYMBOL FORMULA
Frequency hertz Hz 1/s
Force newton N kg • m/s 2
Pressure and
Stress
pascal Pa N/m2
Energy, Work
and Quantity of
heat
joule J N•m
Power watt W J/s
Quantity of
electricity
coulomb C A•s
Electric
potential
difference,
Voltage, and
Electromotive
force
volt V W/A
Quantity of
static
electricity and
Electric
capacitance
farad F C/V
Electric
resistance
ohm V/A
Celsius
temperature
celsius
degree or
degree
C (t+273.15)K
Illuminance lux lx lm/m2

1. OUTLINE
1-7
(5) Prefixes of SI
(6) Unit Conversion
*1 Units that are allowed to use.
Table 1-5
PREFIX SYMBOL MULTIPLICATION FACTORS
giga G 109
mega M 106
kilo k 103
hecto h 102
deca da 10
deci d 10–1
centi c 10–2
milli m 10–3
micro µ 10–6
nano n 10–9
pico p 10–12
Table 1-6
QUANTITY Gravitational SI CONVERSION
FACTOR
Mass kg kg
Force kgf N 1 kgf = 9.807 N
Torque kgf•m N•m kgf•m = 9.807 N•m
Pressure kgf/cm2
MPa 1 kgf/cm2
= 0.09807 MPa
Motive
Power
PS kW 1 PS = 0.7355 kW
Revolution rpm min–1
r/min *1

2. SPECIFICATIONS
TABLE OF CONTENTS
2.1 COMPONENTS NAME .....................................................................................2-3
2.2 MACHINE DIMENSIONS ..................................................................................2-4
2.3 SPECIFICATIONS AND PERFORMANCE .......................................................2-6
2.4 MACHINE & COMPONENTS WEIGHT (DRY) .................................................2-7
2.5 TRANSPORTATION .........................................................................................2-9
2.6 TYPE OF CRAWLER SHOES ........................................................................2-11
2.7 TYPE OF BUCKET .........................................................................................2-12
2.8 ENGINE SPECIFICATIONS ............................................................................2-14
2.8.1 SPECIFICATIONS ......................................................................................2-14
2.8.2 ENGINE PERFORMANCE CURVE ............................................................2-15

2. SPECIFICATIONS
2-3
2.1 COMPONENTS NAME
No. NAME No. NAME No. NAME No. NAME
1 Engine 2 Oil filter 3 Radiator 4 Reservoir tank
5 Air cleaner 6 Muffler 7 Fuel tank 8 Hydraulic tank
9 Hydraulic pump 10 Slewing motor 11 Swing cylinder 12 Control valve
13 Travel lever 14 Safety lock lever 15 Canopy 16 Operating lever
17 Dozer operating lever 18 Throttle lever 19 Monitor panel (gauge cluster)
20 Battery 21 Swivel joint 22 Travel motor 23 Slewing bearing
24 Idler assy 25 Lower roller 26 Upper roller 27 Rubber crawler shoe
28 Dozer blade 29 Dozer cylinder 30 Boom 31 Boom cylinder
32 Arm cylinder 33 Light 34 Arm 35 Link
36 Bucket cylinder 37 Bucket
37
35
34
36
32
30
33
31
13
14
29
11
15 16 17 8
18
12
19
3
4
1
5
6
2
1022
23
9
21
26
7
25
24
27
20
28

2. SPECIFICATIONS
2-4
2.2 MACHINE DIMENSIONS
Unit: mm (ft•in)
(1) CX40B (CANOPY)
(2) CX40B (CAB)
345
{13.6"}
1630 {5'4.2"}
1820 {5'11.7"}
2330 {7'7.7"}
635
{2'1.0"}2600{8'6.4"}
980 {3'2.6"}
1570 {5'1.8"}
2140 {7'0.3"}
5000 {16'4.9"}
115
{4.53"}
70
{2.76"}
750{2'5.5"}725{2'4.5"}
1960{6'5.2"}
0
2780 {9'1.4"}1960 {6'5.2"}
1560 {5'1.4"}
400 {15.7"}
1940 {6'4.4"}
R980
{3'2.6"}
345
{13.6"}
1630 {5'4.2"}
1820 {5'11.7"}
2330 {7'7.7"}
635
{2'1.0"}2600{8'6.4"}
980 {3'2.6"}
1570 {5'1.8"}
5000 {16'4.9"}
2780 {9'1.4"}1960 {6'5.2"}
1560 {5'1.4"}
400 {15.7"}
1940 {6'4.4"}
2140 {7'0.3"}
115
{4.53"}
70
{2.76"}
750{2'5.5"}725{2'4.5"}
1960{6'5.2"}
0
R980
{3'2.6"}

2. SPECIFICATIONS
2-5
Unit: mm (ft•in)
(3) CX50B (CANOPY)
(4) CX50B (CAB)
345
{13.6"}
1690 {5'6.5"}
1970 {6'5.6"}
2480 {8'1.6"} 635
{2'1.0"}2600{8'6.4"}
980 {3'2.6"}
1570 {5'1.8"}
2140 {7'0.3"}
2910 {9'6.6"}1960 {6'5.2"}
1560 {5'1.4"}
400 {15.7"}
1940 {6'4.4"} 5230 {17'1.9"}
140
{5.51"}
70
{2.76"}
25
{0.98"}
750{2'5.5"}725{2'4.5"}
1960{6'5.2"}
R980
{3'2.6"}
345
{13.6"}
1690 {5'6.5"}
1970 {6'5.6"}
2480 {8'1.6"}
635
{2'1.0"}2600{8'6.4"}
980 {3'2.6"}
1570 {5'1.8"}
2140 {7'0.3"}
2910 {9'6.6"}
5230 {17'1.9"}
1960 {6'5.2"}
1560 {5'1.4"}
400 {15.7"}
1940 {6'4.4"}
140
{5.51"}
70
{2.76"}
25
{0.98"}
750{2'5.5"}725{2'4.5"}
1960{6'5.2"}
R980
{3'2.6"}

2. SPECIFICATIONS
2-6
2.3 SPECIFICATIONS AND PERFORMANCE
SPEED AND GRADEABILITY
ENGINE
HYDRAULIC COMPONENTS
SIDE DIGGING & DOZER
WEIGHT
Note: This figure is calculated with standard bucket.
Model CX40B CX50B
Applicable Machines PH05-03501~ PJ04-03001~
Shoe Type Rubber shoe Iron shoe (OPT) Rubber shoe Iron shoe (OPT)
Slewing Speed min-1 {rpm} 8.8 {8.8} 8.8 {8.8}
Travel Speed km/h (mph)
Low
(1st)
High
(2nd)
Low
(1st)
High
(2nd)
Low
(1st)
High
(2nd)
Low
(1st)
High
(2nd)
2.8 4.6 2.8 4.6 2.8 4.6 2.8 4.6
Gradeability % (degree) 58(30)
Model (YANMAR) 4TNV88-XYB
Type Water-cooled, 4-cycle type Swirl chamber type diesel engine
Number of cylinders-Bore × Stroke 4 - ø88 mm × 90 mm (3.46 in × 3.54 in)
Total Displacement L 2.189 (134 cu•in)
Output Rating kW/min-1
{PS/rpm} 30.4 / 2400 {41.3 / 2400}
Maximum Torque
N•m/min-1
(lbf•ft/rpm)
98.4 / 1440 (72.6 / 1440)
Starting Motor V × kW 12 × 2.3
Generator V × A 12 × 55
Hydraulic Pump Variable displacement axial piston + gear pump
Hydraulic Motor Axial piston
Hydraulic Motor w/Reducer (Travel) 2-Axial piston, 2-Speed motor
Control Valve 11-spool multiple control valve
Cylinder (Boom, Arm, Swing, Bucket, Dozer) Double action cylinder
Return Filter Safety valve containing/Filter Type (30µ)
Type Boom swing by hydraulic cylinder
Boom Swing Angle
Right 60°
Left 70°
Stroke of Dozer (above/below) mm (in) 505 / 325 (19.9/12.8) 495 / 375 (19.5 / 14.8)
Machine Weight kg (lb)
Rubber shoe Iron shoe Rubber shoe Iron shoe
4200 (9260) 4300 (9480) 4630 (10200) 4730 (10400)
Upper slewing body kg (lb) 1930 (4260) ← 2280 (5030) ←
Travel system kg (lb) 1670 (3680) 1770 (3900) 1720 (3790) 1820 (4010)
Attachment
(Boom+STD Arm+STD Bucket)
kg (lb) 505 (1110) 535 (1180)
Oil & Water kg (lb) 95 (209) ←

2. SPECIFICATIONS
2-7
2.4 MACHINE & COMPONENTS WEIGHT (DRY)
Note: Bucket weight is shown with standard bucket weight.
Unit: kg (lb)
MODEL
CX40B
RUBBER SHOE IRON SHOE
CANOPY CAB CANOPY CAB
COMPLETE MACHINE 4200 (9260) 4340 (9570) 4300 (9480) 4440 (9790)
UPPER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 1930 (4260) 2070 (4560) 1930 (4260) 2070 (4560)
UPPER FRAME 570 (1260) ← ← ←
CANOPY / CAB 85 (187) 220 (485) 85 (187) 220 (485)
ENGINE 170 (375) ← ← ←
HYDRAULIC PUMP 35 (77) ← ← ←
RADIATOR 5 (11) ← ← ←
HYDRAULIC TANK 37 (82) ← ← ←
FUEL TANK 4 (9) ← ← ←
SWING BRACKET 110 (243) ← ← ←
SWING CYLINDER 39 (86) ← ← ←
SLEWING MOTOR 40 (88) ← ← ←
CONTROL VALVE 35 (77) ← ← ←
COUNTERWEIGHT 270 (595) ← ← ←
GUARD • BONNET 145 (320) ← ← ←
BOOM CYLINDER 47 (104) ← ← ←
LOWER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 1670 (3680) ← 1770 (3900) ←
LOWER FRAME 525 (1160) ← ← ←
SLEWING BEARING 76 (168) ← ← ←
TRAVEL MOTOR 65×2 (143×2) ← ← ←
UPPER ROLLER 5×2 (11×2) ← ← ←
LOWER ROLLER 9×10 (20×10) ← ← ←
FRONT IDLER 42×2 (93×2) ← ← ←
IDLER ADJUSTER 30×2 (66×2) ← ← ←
SPROCKET 14×2 (31×2) ← ← ←
RUBBER CRAWLER SHOE
210 ×2
(463×2)
← — —
400 mm (15.7") IRON SHOE — —
260×2
(573× 2)
←
SWIVEL JOINT 22 (49) ← ← ←
DOZER 170 (375) ← ← ←
DOZER CYLINDER 27 (60) ← ← ←
ATTACHMENT ASSEMBLY (ASSY OF FOLLOWINGS) 505 (1110) ← ← ←
BOOM ASSEMBLY 230 (507) ← ← ←
BOOM 160 (353) ← ← ←
ARM CYLINDER 42 (93) ← ← ←
ARM ASSEMBLY 170 (375) ← ← ←
ARM 105 (232) ← ← ←
BUCKET CYLINDER 27 (60) ← ← ←
BUCKET LINK 13 (29) ← ← ←
IDLER LINK 4×2 (9×2) ← ← ←
BUCKET ASSEMBLY (STD) 107 (236) ← ← ←
FLUIDS (ASSY OF FOLLOWINGS) 95 (210) ← ← ←
HYDRAULIC OIL 45 (99) ← ← ←
FUEL 44 (97) ← ← ←

2. SPECIFICATIONS
2-8
Note: Bucket weight is shown with standard bucket weight.
Unit: kg (lb)
MODEL
CX50B
RUBBER SHOE IRON SHOE
CANOPY CAB CANOPY CAB
COMPLETE MACHINE 4630 (10200) 4770 (10500) 4730 (10400) 4870 (10700)
UPPER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 2280 (5030) 2420 (5340) 2280 (5030) 2420 (5340)
UPPER FRAME 570 (1,260) ← ← ←
CANOPY / CAB 85 (187) 220 (485) 85 (187) 220 (485)
ENGINE 170 (375) ← ← ←
HYDRAULIC PUMP 35 (77) ← ← ←
RADIATOR 5 (11) ← ← ←
HYDRAULIC TANK 37 (82) ← ← ←
FUEL TANK 4 (9) ← ← ←
SWING BRACKET 110 (243) ← ← ←
SWING CYLINDER 39 (86) ← ← ←
SLEWING MOTOR 40 (88) ← ← ←
CONTROL VALVE 35 (77) ← ← ←
COUNTERWEIGHT 580 (1,280) ← ← ←
GUARD • BONNET 145 (320) ← ← ←
BOOM CYLINDER 58 (128) ← ← ←
LOWER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 1720 (3790) ← 1820 (4010) ←
LOWER FRAME 545 (1,200) ← ← ←
SLEWING BEARING 76 (168) ← ← ←
TRAVEL MOTOR 65×2 (143×2) ← ← ←
UPPER ROLLER 5×2 (11×2) ← ← ←
LOWER ROLLER 9×10 (20×10) ← ← ←
FRONT IDLER 42×2 (93×2) ← ← ←
IDLER ADJUSTER 30×2 (66×2) ← ← ←
SPROCKET 14×2 (31×2) ← ← ←
RUBBER CRAWLER SHOE
210 ×2
(463×2)
← — —
400 mm (15.7") IRON SHOE — —
275 ×2
(606×2)
←
SWIVEL JOINT 22 (49) ← ← ←
DOZER 175 (386) ← ← ←
DOZER CYLINDER 27 (60) ← ← ←
ATTACHMENT ASSEMBLY (ASSY OF FOLLOWINGS) 535 (1,180) ← ← ←
BOOM ASSEMBLY 240 (529) ← ← ←
BOOM 165 (364) ← ← ←
ARM CYLINDER 50 (110) ← ← ←
ARM ASSEMBLY 180 (397) ← ← ←
ARM 115 (256) ← ← ←
BUCKET CYLINDER 27 (60) ← ← ←
BUCKET LINK 13 (29) ← ← ←
IDLER LINK 4×2 (9×2) ← ← ←
BUCKET ASSEMBLY (STD) 112 (247) ← ← ←
FLUIDS (ASSY OF FOLLOWINGS) 95 (210) ← ← ←
HYDRAULIC OIL 45 (99) ← ← ←
FUEL 44 (97) ← ← ←
COOLANT 6 (13) ← ← ←

2. SPECIFICATIONS
2-9
2.5 TRANSPORTATION
(1) LOADING MACHINE ON A TRAILER
1) Keep trailer bed clean. Put chocks against truck wheels.
2) Use a ramp or loading deck. Ramps must be strong enough, have a low angle, and correct height. Load and
unload machine on a level surface.
3) Travel machine onto ramps slowly. Center the machine over the trailer.
4) Lower all attachment.
5) Stop engine. Remove key from switch.
SWARNING
Do not put chains over or against hydraulic lines or hoses.
6) Fasten machine to trailer with chains or cables.
During transportation, the bucket or attachments may hit the canopy or the cab. Therefore, set the machine in
the transporting position by observing following points:
1. Extend the bucket cylinder fully.
2. Extend the arm cylinder fully.
3. Lower the boom.
4. If machine cannot be transported with arm cylinder fully extended, remove bucket or attachment and extend
arm cylinder.
(2) TRANSPORTATION DIMENSION AND WEIGHT OF ATTACHMENT
1) BOOM WITH ARM CYLINDER
2) ARM & BUCKET (Standard bucket)
Model CX40B CX50B
L × H × W
mm (ft•in)
2790 × 1070 × 310
(9’1.8") (3’6.1") (12.2")
2910 × 1040 × 310
(9’6.6") (3’4.9") (12.2")
Weight w/arm cyl. kg (lb) 223 (492) 237 (523)
Model CX40B CX50B
L × H × W
mm (ft•in)
2630 × 510 × 600
(8’7.5") (20.1") (23.6")
2770 × 510 × 650
(9’1.1") (20.1") (25.6")
Weight kg (lb) 164 (362) 175 (386)
L
H
L
H

2. SPECIFICATIONS
2-10
3) ARM
4) BUCKET (Standard bucket)
5) DOZER
w/o cylinder weight
Model CX40B CX50B
L × H × W
mm (ft•in)
1870 × 420 × 250
(6’1.6") (16.5") (9.84")
2010 × 420 × 250
(6’7.1") (16.5") (9.84")
Weight kg (lb) 164 (362) 175 (386)
Model CX40B CX50B
Heaped capacity
m3(cu•yd)
0.14 (0.18) 0.16 (0.21)
L × H × W
mm (ft•in)
780 × 690 × 650
(30.7") (27.2") (25.6")
780 × 690 × 750
(30.7") (27.2") (29.5")
Weight kg (lb) 89 (196) 98 (216)
Model CX40B CX50B
L × H × W
mm (ft•in)
1130 × 335 × 1960
(3’85") (13.2") (6’5.2")
1190 × 335 × 1960
(3’11") (13.2") (6’5.2")
Weight kg (lb) 170 (375) 175 (386)
L
H
L
H
L
H

2. SPECIFICATIONS
2-11
2.6 TYPE OF CRAWLER SHOES
Type Model
Shoe width
mm (in)
Total Crawler
width
mm (ft•in)
Number of
Link
Ground pressure
kPa (psi)
CANOPY CAB
Rubber shoe
CX40B 400 (15.7") 1960 (6’5") 68 26 (3.77) 27 (3.92)
CX50B 400 (15.7") 1960 (6’5") 72 26 (3.77) 27 (3.92)
Iron shoe (option)
CX40B 400 (15.7") 1960 (6’5") 36 26 (3.77) 27 (3.92)
CX50B 400 (15.7") 1960 (6’5") 38 27 (3.92) 28 (4.06)

2. SPECIFICATIONS
2-12
2.7 TYPE OF BUCKET
TYPE ARM
Width mm (ft•in)
Heaped
capacity
m3
(cu.yd)
(ISO 7451)
Weight kg (lb)
CX40B
Length
1870 mm
(6’1.62” ft•in)
CX50B
Length
2010 mm
(6’7.13” ft•in)
Digging buckets 300 (11.81”) 0.050 (0.06) 56.14 (123.37)
Digging buckets 450 (17.72”) 0.090 (0.11) 74.01 (163.16)
Digging buckets 550 (21.65”) 0.120 (0.15) 82.43 (181.72)
Digging buckets 600 (23.62”) 0.130 (0.17) 85.89 (189.35)
Digging buckets 650 (25.59”) 0.140 (0.18) 89.33 (196.94)
Digging buckets 700 (27.56”) 0.160 (0.21) 92.79 (204.57)
Digging buckets 750 (29.53”) 0.180 (0.23) 97.73 (215.45)
Digging buckets 800 (31.49”) 0.200 (0.26) 101.22 (223.15)
Digging buckets 900 (35.43”) 0.220 (0.28) 109.64 (241.71)
Cleaning buckets 1200 (47.24”) 0.220 (0.28) 113.17 (249.49)

2. SPECIFICATIONS
2-13
SWARNING
◆ The buckets with this length, during left arm slewing higher than 1 m from ground, can interfere with the cabin.
For a safe use, consult the Dealer and ask for left slewing limiter of the arm support.
●: Width with lateral cutter
❍: Width without lateral cutter
: Generic digging
for digging and sand loading operations, gravel, clay, earth in general, etc..
The specific weight of the material should not be higher than 1400 kg/m3
.
■: Digging for light applications for operations of digging,sand loading/unloading of gravel, clay, earth in friabile and
dry state, ditch cleaning, etc.

2. SPECIFICATIONS
2-14
2.8 ENGINE SPECIFICATIONS
2.8.1 SPECIFICATIONS
Model CX40B, CX50B
Engine Model 4TNV88-XYB
Type Vertical, 4-cycle water-cooled diesel engine
No. of cylinders - Bore × Stroke 4 - 88 mm (3.46 in) × 90 mm (3.54 in)
Total displacement 2.189 liter (134 cu•in)
Compression ratio 19.1
Rated output 30.4 kW (41.3 PS) at 2400 rpm
Maximum torque 139.3 ~ 147.1 N•m (103 ~ 109 lbf•ft) at 1440 rpm
Low idling 1175 ± 25 rpm
High idling 2600 ± 25 rpm
Fuel consumption rate Less than 242 g / kWh (178 g / PS•h)
Allowable tilting angles Continuous ; 30 for all direction
Rotating direction Counterclockwise as seen from flywheel side
Firing order 1-3-4-2-1
Fuel injection timing (FID, b.T.D.C.) 15.5±1
Fuel injection pressure 19.6 MPa (2840 psi)
Valve action
Open Close
Intake valve b.T.D.C. 15 ± 5 a.B.D.C. 45 ± 5
Exhaust valve b.T.D.C. 56 ± 5 a.B.D.C. 18 ± 5
Valve clearance
Intake valve 0.2 mm (0.008 in) in cold condition
Exhaust valve 0.2 mm (0.008 in) in cold condition
Thermostat action Start 71 ± 1.5 C (160 ± 3 F) / Full open 85 C (185 F)
Compression pressure 3.4 ± 0.1 MPa (500 ± 14 psi) at 250 rpm
Lubrication oil pressure 0.44 MPa (64 psi) at 2300 rpm
Dimensions L × W × H 684 × 554 × 662 mm (26.9 × 21.8 × 26.1 in)
Dry weight 170 kg (375 lb)
Governor Mechanical centrifugal governor (All speed type)
Fuel filtration cartridge type paper filter
Lubrication system Forced lubrication with trochoid pump
Cooling system Liquid cooling / Radiator
Starter capacity 12 V × 2.3kW
Generator capacity 12 V × 55 A
Starting aid Air heater (12 V - 400 W)
Cooling water capacity: Max / Engine 6.0 / 2.7 liter (1.59 / 0.71 gal)
Engine oil volume: Max / Effective 7.4 / 4.0 liter (1.96 / 1.06 gal)

2. SPECIFICATIONS
2-15
2.8.2 ENGINE PERFORMANCE CURVE
CX40B, CX50B
Model: 4TNV88A-XYB
Rated Output: 30.4 kW / 2400 min-1
(41.3 PS / 2400 rpm)
F
Fuel consumption volume = X P X α
ρ X 1000
242
= X 21.2 X α
0.835 X 1000
= 8.81 α
800
200 0
5 (7)
10
15
20
25
30
35
40
(14)
(20)
(27)
(34)
(41)
(48)
(54)
45
50
(61)
(68)
300
400
500
600
0
2
4
220
240
260
280
300
320
50
75
100
125
150
175
200
g/kWh
g/PSh
(147)
(162)
(177)
(191)
(206)
(221)
(235)
(37)
(55)
(74)
(92)
(111)
(129)
(148)
1000 1200 16001400 1800 2000 2200 2400 2600 2800
SdSd
GTGT
T
PSPS
F
PSkW
[Sd]
[ F ]
[PS]
[GT]
min-1
{rpm}
[ T ]
F. Fuel consumption rate (g/kwh)
P. Shaft output (kw)
ρ. Specific gravity
α. Standard load factory (0.60 ~ 0.70)
Fuel consumption in normal operation; 5.29 ~ 6.17
L/h (load factor: (0.60 ~ 0.70))
T. Shaft torque
F. Fuel consumption rate
PS.Power output
GT. Exhaust temperature
Sd. Smoke: Bosch

TABLE OF CONTENTS
3
3. ATTACHMENT DIMENSIONS
3.1 BOOM ...............................................................................................................3-3
3.1.1 BOOM DIMENSIONAL DRAWINGS .............................................................3-3
3.1.2 BOOM MAINTENANCE STANDARDS .........................................................3-4
3.2 ARM ..................................................................................................................3-7
3.2.1 ARM DIMENSIONAL DRAWINGS ................................................................3-7
3.2.2 ARM MAINTENANCE STANDARDS ............................................................3-9
3.3 BUCKET ..........................................................................................................3-13
3.3.1 BUCKET DIMENSIONAL DRAWINGS .......................................................3-13
3.3.2 DETAIL DIMENSIONAL DRAWINGS OF LUG SECTION ..........................3-14
3.4 DOZER ............................................................................................................3-15
3.4.1 DOZER DIMENSIONAL DRAWINGS .........................................................3-15
3.4.2 DOZER MAINTENANCE STANDARDS .....................................................3-16
3.5 SWING ............................................................................................................3-18
3.5.1 SWING BRACKET DIMENSIONAL DRAWINGS ........................................3-18
3.5.2 SWING PORTION MAINTENANCE STANDARDS ....................................3-19

3-3
3.1 BOOM
3.1.1 BOOM DIMENSIONAL DRAWINGS
Fig. 3-1 Boom Dimensional Drawings
Table 3-1
Unit: mm (ft•in)
No. NAME
DIMENSIONS
CX40B CX50B
A Boom length 2670 (8'9.12") 2790 (9'1.84")
B Distance between pins of boss R1406 (4'7.35") R1434 (4'8.46")
C Distance between pins of bracket R1475 (4'10.1") R1487.5 (4'10.6")
D Height of boom cylinder rod pin 470 (18.5") 457.5 (18.0")
E Height of arm cylinder (head side) pin 941.5 (37.1") 908 (35.7")
F Boom width 250 (9.84") ←
G
Inner width of bracket for boom cylinder (rod side) mount-
ing
76 (2.99") ←
H Boom end inner width 175 (6.89") ←
J Boom end outer width 265 (10.4") ←
K Inner width of bracket for arm cylinder (head side) 66 (2.60") ←
d1
Boom pin dia.
[Bushing outer dia.]
ø50 (1.97")
[ø60 (2.36")]
←
d2 Boom cylinder (rod side) pin dia. ø50 (1.97") ←
d3 Pin dia. of arm end ø60 (2.36") ←
d4 Arm cylinder (head side) pin dia. ø45 (1.77") ←

3-4
3.1.2 BOOM MAINTENANCE STANDARDS
(1) Clearance of pin and bushing on boom section
Fig. 3-2 Clearance of pin and bushing on boom section
(Note)
• The tolerance for bushing inside diameter means the dimension after fitting of it into place.
• The part number for pins may be changed owing to improvement, use them only for reference.
Table 3-2
Unit: mm (in)
Pos. Item
Standard dimensions Clearance
Remedy
Pin dia.
Tolerance
on pin dia.
Tolerance
on bushing
bore dia.
Standard
value
Standard
value for
repair
Serviceabili
ty limit
A Boom
ø50
(1.97)
–0.02
–0.08
(-0.0008)
(-0.0031)
+0.061
0
(+0.0024)
( 0 )
0.02~
0.141
(0.0008~0.0
056)
0.7
(0.028)
1.0
(0.039)
Replace
bushing or
pin
B
Boom
cylinder
(Head side)
+0.25
+0.05
(+0.0098)
(+0.0020)
0.07~
0.33
(0.0028~
0.0130)
C
Boom
cylinder
(Rod side)
D
Arm
cylinder
(Head side)
ø45
(1.77)

3-5
(2) Clearance in thrust direction on boom and cylinder installation section
Fig. 3-3 Clearance in thrust direction on boom section

3-6
Table 3-3
Unit: mm (in)
Sec. Item
Standard dimen-
sions
Clearance X adjusted with shim
(total of both sides)
Remedy
Pin length
No. Dimensions
Standard
value
Standard
value for
repair
Serviceabil-
ity limit
No. Dimensions
A-A Boom
Boom
L1
250
(9.84 )
0.1~0.5
(0.004~
0.020)
1.0
(0.039)
1.5
(0.059)
Adjust-
ed with
shim
PL1
377
(14.8)
Swing
bracket
250
(9.84 )
B-B
Boom cylinder
(Head side)
Boom
cylinder
L2
75
(2.95 )
0.1~0.5
(0.004~
0.020)
PL2
264
(10.4)
Swing
bracket
77
(3.03 )
C-C
Boom cylinder
(Rod side)
Boom
cylinder
L3
75
(2.95 )
0.5~0.9
(0.020~
0.035)
PL3
213
(8.39)
Boom
76
(2.99 )
D-D
Arm cylinder
(Head side)
Arm
cylinder
L4
65
(2.56 )
0.1~0.5
(0.004~
0.020)
PL4
200
(7.87)
Boom
66
(2.60 )

3-7
3.2 ARM
3.2.1 ARM DIMENSIONAL DRAWINGS
Fig. 3-4 Arm dimensional drawings

3-8
Table 3-4
Unit: mm (ft•in)
No. Name
Dimensions
CX40B CX50B
A Arm length
1430
(4'8.30")
1560
(5'1.42")
B Distance between pins of boss and bracket
R405
(15.9")
←
C Distance between pins of boss and bracket
R1118
(3'8.02")
←
D Distance between pins of boss and boss
R230.5
(9.07")
←
E Height between pins of boss and bracket
311
(12.2")
←
F Height between pins of boss and bracket
211
(8.31")
191.5
(7.54")
G Height between pins of boss and center
12
(0.472")
←
H Boss width
150
(5.91")
←
J Boss width
175
(6.89")
←
K Bracket inner width
61
(2.40")
←
L Bracket inner width
61
(2.40")
66
(2.60")
M Idler link dimension
320
(12.6")
←
N Bucket link dimension
310
(12.2")
←
D1 I.D. of boss
ø55
(2.17")
←
D2 I.D. of boss
ø55
(2.17")
←
D3 I.D. of boss
ø75
(2.95")
←
d1 Pin dia.
ø45
(1.77")
←
d2 Pin dia.
ø45
(1.77")
←
d3 Pin dia.
ø60
(2.36")
←
d4 Pin dia.
ø45
(1.77")
←
d5 Pin dia.
ø45
(1.77")
←

3-9
3.2.2 ARM MAINTENANCE STANDARDS
(1) Clearance of pin and bushing
Fig. 3-5 Clearance of pin and bushing on arm section
(Note)
Unit: mm (in)
Pos. Item
Standard dimensions Clearance
Remedy
Pin dia.
Tolerance
on pin dia.
Tolerance on
bushing bore
dia.
Standard value
Standard
value for
repair
Serviceability
limit
A
Arm point
(Connected part of
bucket)
ø45
(1.77)
–0.02
–0.05
(-0.0008)
(-0.0020)
+0.064
+0.005
(+0.0025)
(+0.0002)
0.025~
0.114
(0.0010~
0.0045)
0.7
(0.028)
1.0
(0.039)
Replace
bushing or
pin
B
Bucket link
(Bucket side)
C
Idler link
(Connected part of arm)
+0.076
+0.035
(+0.0030)
(+0.0014)
0.055~
0.126
(0.0022~
0.0050)
D
Bucket link
(Idler link side)
+0.073
+0.032
(+0.0029)
(+0.0013)
0.052~
0.123
(0.0020~
0.0048)
D’
Bucket cylinder
(Rod side)
+0.25
+0.05
(+0.0098)
(+0.0020)
0.07~
0.30
(0.0028~
0.0118)E
Bucket cylinder
(Head side)
F
Arm foot
(Connected part of
boom)
ø60
(2.36)
+0.061
0
(+0.0024)
( 0 )
0.02~
0.111
(0.0008~
0.0044)
G
Arm cylinder
(Rod side)
ø45
(1.77)
+0.25
+0.05
(+0.0098)
(+0.0020)
0.07~
0.30
(0.0028~
0.0118)

3-10
(2) Clearance in thrust direction on arm and cylinder installation section
Fig. 3-6 Clearance in thrust direction on arm section

3-11
(Note)
• Clearance X shall be adjusted using shims, if clearance exceeds the standard value for repair.
Table 3-6
• CX40B Unit: mm (in)
Sec. Item
Standard dimen-
sions
Clearance X adjusted with
shim (total of both sides)
Remedy
Pin length
No. Dimensions
Standard
value
Standard
value for
repair
Service-
ability
limit
No. Dimensions
A-A Arm point
Arm
L1
150
(5.91)
0.7~2.2
(0.028~
0.087)
See "NOTE"
Adjust-
ed with
shim
PL1
287.5
(11.3)
Bucket
151
(5.94 )
B-B Bucket link
Link side
L2
150
(5.91 )
PL2
287.5
(11.3)
Bucket
151
(5.94 )
C-C
Idler link
(Connected
part of arm)
Arm
L3
150
(5.91)
0.1~0.5
(0.004~
0.020)
— PL3
210.5
(8.29)
Link side
—
(—)
D-D
Bucket link
(Rod side)
Rod side
L4
55
(2.165 )
0.6~1.0
(0.024~
0.039)
1.5
(0.059)
2.0
(0.079)
PL5
210.5
(8.29)
Link side
57±0.4
(2.24±0.016)
Bucket link
(Idler link side)
Bucket link
L5
150
(5.91 )
0.1~0.5
(0.004~
0.020)
—
Idler link
—
(—)
E-E
Bucket cylinder
(Head side)
Head side
L6
60
(2.36 )
0.5~0.9
(0.020~
0.035)
1.0
(0.039)
1.5
(0.059)
PL6
183
(7.20)
Arm
61
(2.40 )
F-F Arm foot
Arm
L7
175
(6.89 )
Less
than 0.5
(0.020)
PL7
265
(10.4)
Boom
175
(6.89 )
G-G
Arm cylinder
(Rod side)
Rod side
L8
60
(2.362 )
0.5~0.9
(0.020~
0.035)
PL8
183
(7.20)
Arm
61
(2.402 )

3-12
(Note)
Table 3-7
• CX50B Unit: mm (in)
Sec. Item
Standard dimen-
sions
Clearance X adjusted with
shim (total of both sides)
Remedy
Pin length
No. Dimensions
Standard
value
Standard
value for
repair
Service-
ability
limit
No. Dimensions
A-A Arm point
Arm
L1
150
(5.91)
0.7~2.2
(0.028~
0.087)
See "NOTE"
Adjust-
ed with
shim
PL1
287.5
(11.3)
Bucket
151
(5.94 )
B-B Bucket link
Link side
L2
150
(5.91 )
PL2
287.5
(11.3)
Bucket
151
(5.94 )
C-C
Idler link
(Connected
part of arm)
Arm
L3
150
(5.91)
0.1~0.5
(0.004~
0.020)
— PL3
210.5
(8.29)
Link side
—
(—)
D-D
Bucket link
(Rod side)
Rod side
L4
55
(2.165 )
0.6~1.0
(0.024~
0.039)
1.5
(0.059)
2.0
(0.079)
PL5
210.5
(8.29)
Link side
57±0.4
(2.24±0.016)
Bucket link
(Idler link side)
Bucket link
L5
150
(5.91 )
0.1~0.5
(0.004~
0.020)
—
Idler link
—
(—)
E-E
Bucket cylinder
(Head side)
Head side
L6
60
(2.36 )
0.5~0.9
(0.020~
0.035)
1.0
(0.039)
1.5
(0.059)
PL6
183
(7.20)
Arm
61
(2.40 )
F-F Arm foot
Arm
L7
175
(6.89 )
Less
than 0.5
(0.020)
PL7
265
(10.4)
Boom
175
(6.89 )
G-G
Arm cylinder
(Rod side)
Rod side
L8
65
(2.56 )
0.5~0.9
(0.020~
0.035)
PL8
183
(7.20)
Arm
66
(2.60 )

3-13
3.3 BUCKET
3.3.1 BUCKET DIMENSIONAL DRAWINGS
Fig. 3-7 Bucket dimensional drawings
Table 3-8
Unit: mm (in)
No.
Model CX40B CX50B
Heaped Capacity m3
(cu.yd)
0.14
(0.17)
0.16
(0.20)
A Distance between pin and bracket 228.5 (9) ←
B Distance between bucket pin and tooth end R802 (31.6) ←
C Inner width of bucket top end 568 (22.36) 668 (26.29)
D Inner width of lug 181 (7.12) ←
E Inner width of bracket 151 (5.94) ←
F Outer width of side cutter 650 (25.59) 700 (27.56)
G Outer width of bucket bottom plate 510 (20.08) 610 (24.01)
H Outer tooth distance 500 (19.68) 600 (23.62)
J Pitch between teeth 166 (6.53) 200 (7.87)
J0 Pitch between teeth 166 (6.53) 200 (7.87)
d1 Pin dia. ø45 (1.77) ←
d2 Pin dia. ø45 (1.77) ←

3-14
3.3.2 DETAIL DIMENSIONAL DRAWINGS OF LUG SECTION
Fig. 3-8 Dimension of lug section
Table 3-9
Unit: mm (in)
Portion
Plate outer dia.
øA
Boss thickness
B
Pin bore dia.
øC
Lug plate thickness
D
Dimensions
ø75
(2.95)
15
(0.59)
ø45
(1.77 )
10
(0.39)

3-15
3.4 DOZER
3.4.1 DOZER DIMENSIONAL DRAWINGS
Fig. 3-10 Dozer dimensional drawings
Table 3-10
Unit: mm (ft•in)
No. NAME
Dimensions
CX40B CX50B
A Blade width 1960 (6'5.17") ←
B Blade height 346 (1'1.62") ←
C Distance from dozer attaching pin center to cutting edge end R1092 (3'6.99") R1149 (3'9.24")
D Inner width of dozer attaching bracket 531 (20.9") ←
E Width of dozer attaching bracket 69 (2.72") ←
F
Distance from dozer attaching pin center to attaching pin on dozer
cylinder head side
R712 (28.0") ←
G Attaching bracket inner width on dozer cylinder head side 62 (2.44") ←
H Horizontal distance from dozer attaching pin center to edge end 1046 (3'5.18") 1105.3 (3'5.72")
J Vertical distance from dozer attaching pin center to edge end 313 (12.3") ←
d1 Dozer attaching pin dia. ø40 (1.57") ←
d2 Attaching pin dia. on dozer cylinder head side ø55 (2.17") ←

3-16
3.4.2 DOZER MAINTENANCE STANDARDS
Fig. 3-11 Dozer maintenance standards
A-B-C = Pin
(Note)
Table 3-11
Unit: mm (in)
Pos. Item
Standard dimension Clearance
Pin dia.
Tolerance on
pin dia.
Tolerance on
bushing bore
dia.
Standard val-
ue
Standard val-
ue for repair
Serviceabili-
ty limit
A
Dozer blade cylinder
(Head side) ø55
(2.17)
–0.15
–0.21
(-0.0059)
(-0.0083)
+0.25
+0.05
(+0.0098)
(+0.0020)
0.20~
0.46
(0.0079~0.01
81) 1.5
(0.059)
2.0
(0.079)
B
Dozer blade cylinder
(Rod side)
C Dozer blade foot
ø40
(1.57)
–0.06
–0.09
(-0.0024)
(-0.0035)
+0.215
+0.115
(+0.0085)
(+0.0045)
0.175~
0.305
(0.0069~0.01
20)

3-17
(2) Clearance in thrust direction on the dozer and cylinder installation section
(NOTE)
Table 3-12
Unit: mm (in)
Pos. Item
Standard dimensions
Remedy
Pin length
No. Dimensions
Clearance X adjust-
ed with shim
No. Dimensions
A
Dozer blade
cylinder
(Head side)
Head side
L1
60
(2.362 )
2.0~3.5
(0.079~0.035)
Adjusted with
shim
PL1
141
(5.55)
Dozer blade
62
(2.441 )
B
Dozer blade
cylinder
(Rod side)
Rod side
L2
60
(2.362 )
PL2
141
(5.55)
Lower
frame
62
(2.441 )
C
Dozer blade
foot
Dozer blade
L3
69±0.5
(2.72±0.020)
2.5~4.5
(0.079~0.177)
PL3
137
(5.39)Lower
frame
72
(2.83 )

3-18
3.5 SWING
3.5.1 SWING BRACKET DIMENSIONAL DRAWINGS
Fig. 3-12 Swing bracket dimensional drawings
Table 3-13
Unit: mm (in)
No. NAME DIMENSION
A Distance between swing center pin and boom foot pin 67 (2.64)
B Distance between boom foot pin and boom cylinder pin 207.6 (8.17)
C - ditto - 320.7 (12.6)
D Distance between swing center pin and swing cylinder pin R307.5 (12.1)
E - ditto - 290 (11.4)
F Inside width of swing center 329 (13.0)
F1 - ditto - 78.5 (3.09)
F2 - ditto - 76 (2.99)
G Inside width of boom foot 250 (9.84)
H Inside width for installing boom cylinder 77 (3.03)
J Inside width for installing swing cylinder 73 (2.87)
d1 Pin dia. of swing center ø80 (3.15)
d2 Pin dia. of boom foot ø50 (1.97)
d3 Pin dia. of boom cylinder ø50 (1.97)
d4 Pin dia. of swing cylinder ø50 (1.97)
E
H
d3
d2
d1
d4
D
G
J
F2
F1
F
C
B A

3-19
3.5.2 SWING PORTION MAINTENANCE STANDARDS
Fig. 3-13 Clearance of pin and bushing on swing portion
(Note)
Table 3-14
Unit: mm (in)
Pos. Item
Standard dimension Clearance
Pin dia.
Tolerance on
pin dia.
Tolerance on
bushing bore
dia.
Standard
value
Standard
value for
repair
Serviceability
limit
A
Swing cylinder
(Rod side) ø50
(1.97) –0.02
–0.05
(-0.0008)
(-0.0020)
+0.150
0
(+0.0059)
( 0 )
0.02~
0.20
(0.0008~0.00
79) 1.5
(0.059)
2.0
(0.079)
B
Swing cylinder
(Head side)
C
Swing center
(Upper side) ø80
(3.15)
+0.061
+0.009
(+0.0024)
(+0.0004)
0.029~
0.111
(0.0001~0.00
44)
D
Swing center
(Lower side)
B
A
C
D

3-20
(2) Clearance in thrust direction on swing bracket and cylinder installation section
Fig. 3-14 Clearance in thrust direction on swing portion
1. Washer - To be install the groove to the lower side [t=2.3 (0.091”)]
PL1 PL2
L2XL1X
C-C, D-D
A-A B-B
1

3-21
Table 3-15
Unit: mm (in)
Sec. Item
Standard
Dimension
Clearance X adjusted with shim
Remedy
Pin length
No. Dimensions
Standard
value
Standard
value for
repair
Serviceability
limit
No. Dimensions
A-A
Swing
cylinder
(Rod side)
Cylinder
L1
70
(2.76 )
0.5~0.9
(0.020~
0.035)
1.5
(0.059)
—
Adjust-
ed with
shim
PL1
146.5
(5.77)
Bracket
73
(2.87 )
B-B
Swing
cylinder
(Head side)
Cylinder
L2
70
(2.76 )
0.5~0.9
(0.020~
0.035)
1.0
(0.039)
— PL2
151
(5.94)
Upper
frame
72
(2.83 )
C-C
Swing
center
(Upper
side)
Upper
frame
L3
73
(2.87 )
—
Replace
washer
PL3
155
(6.1)
Bracket
78.5
(3.09 )
D-D
Swing
center
(Lower
side)
Upper
frame
L4
73
(2.87 )
Less
than 0.5
(0.020)
1.5
(0.059)
—
Adjust-
ed with
shim
PL4
142
(5.59)
Bracket
78.5
(2.99 )

3-22
[MEMO]

11. TOOLS
TABLE OF CONTENTS
11.1 TORQUE SPECIFICATIONS FOR CAPSCREWS & NUTS ...........................11-3
11.1.1 METRIC COARSE THREAD STANDARD TIGHTENING TORQUE VALUES.
MAKE CERTAIN TO TIGHTEN ALL CAPSCREWS & NUTS TO PROPER
TORQUE VALUES....................................................................................11-3
11.1.2 METRIC FINE THREAD STANDARD TIGHTENING TORQUE VALUES.
MAKE CERTAIN TO TIGHTEN ALL CAPSCREWS & NUTS TO PROPER
TORQUE VALUES. ..................................................................................11-4
11.2 SCREW AND TOOL SIZES ............................................................................11-5
11.2.1 CAPSCREW .............................................................................................11-5
11.2.2 CAPSCREW (SOCKET BOLT) ................................................................11-5
11.3 TORQUE SPECIFICATIONS FOR JOINTS AND HOSES .............................11-5
11.3.1 JOINTS FOR PIPING (O-RING SEALING TYPE) ...................................11-5
11.3.2 HYDRAULIC HOSE (30° FLARE TYPE) .................................................11-5
11.4 TORQUE SPECIFICATIONS FOR SLEEVE TYPE TUBE FITTINGS ............11-6
11.4.1 SLEEVE TYPE TUBE FITTINGS .............................................................11-6
11.5 SPECIAL SPANNERS FOR TUBES ...............................................................11-7
11.6 SPECIAL TOOLS ............................................................................................11-7
11.7 APPLICATION OF SCREW LOCKING AND SEALING COMPOUNDS .........11-7
11.8 COUNTERWEIGHT LIFTING JIG ...................................................................11-8
11.9 UPPER FRAME LIFTING JIG .........................................................................11-9

11. TOOLS
11-3
11.1 TORQUE SPECIFICATIONS FOR CAPSCREWS & NUTS
The following Torque Specifications are provided for use when actual torque value of a fastener is not known. Check
the capscrews and nuts for their looseness and dropping off before the start of daily work and at the periodical main-
tenance. Retighten the loosened ones, and install new ones for the dropped off. For the new machine, the check
and retightening of them must be carried out at first 50 hours operation. For the replacement of them, make sure to
use the same size of genuine parts.
Refer to the table below for the tightening and retightening of capscrews.
•The table below is not applicable for the capscrews to fix the cover, etc., made of plastic. For the tightening torque
for such capscrews, consult with an authorized Distributor. Over-tightening may cause damages on the parts to
be fixed.
•In case that the tightening torque is specified in the manual, use such torque values regardless to the table below.
•Numerical indication on the capscrew head shows the classification for strength (e.g., 7 = 7 T). No indication is pro-
vided for smaller size of capscrews, M 5 or less.
1. Classification
11.1.1 Metric Coarse Thread Standard Tightening Torque Values. Make Certain to tighten all Capscrews
& Nuts to proper torque values.
Torque value Unit: N•m (lbf•ft)
Classification 4.8T 7T 10.9T
Nominal size No lubrication Oil lubrication No lubrication Oil lubrication No lubrication Oil lubrication
M6 P=1
4.4±0.5
(3.2±0.4)
3.7±0.4
(2.7±0.3)
9.6±1.0
(7.1±0.7)
8.1±0.8
(6.0±0.6)
17.4±1.8
(12.8±1.3)
14.7±1.5
(10.8±1.1)
M8 P=1.25
10.7±1.1
(7.9±0.8)
9.0±0.9
(6.6±0.7)
23.5±2.0
(17.3±1.5)
19.6±2.0
(14.5±1.5)
42.2±3.9
(31.1±2.9)
35.3±3.9
(26.0±2.9)
M10 P=1.5
21.6±2.0
(15.9±1.4)
17.9±1.8
(13.2±1.3)
46.1±4.9
(34.0±3.6)
39.2±3.9
(28.9±2.9)
83.4±8.8
(61.5±6.5)
70.6±6.9
(52.1±5.1)
M12 P=1.75
36.3±3.9
(26.8±2.9)
31.4±2.9
(23.2±2.1)
79.4±7.8
(58.6±5.8)
66.7±6.9
(49.2±5.1)
143±15
(105±11)
121±12
(89.2±8.9)
M14 P=2
57.9±5.9
(42.7±4.4)
49.0±4.9
(36.1±3.6)
126±13
(92.9±9.6)
106±10
(78.2±7.4)
226±20
(167±15)
191±19
(141±14)
M16 P=2
88.3±8.8
(65.1±6.5)
74.5±6.9
(55.0±5.1)
191±20
(141±15)
161±16
(119±12)
343±39
(253±29)
284±29
(209±21)
M18 P=2.5
122±12
(90.0±8.9)
103±10
(75.8±7.2)
265±29
(195±21)
226±20
(167±15)
481±49
(355±36)
402±39
(297±29)
M20 P=2.5
172±17
(127±13)
144±14
(106±10)
373±39
(275±29)
314±29
(232±21)
667±69
(492±51)
559±59
(412±44)
M22 P=2.5
226±20
(167±15)
192±20
(142±15)
500±49
(369±36)
422±39
(311±29)
902±88
(665±65)
755±78
(557±58)
M24 P=3
294±29
(217±21)
235±29
(173±21)
637±69
(470±51)
520±49
(383±36)
1160±118
(856±87)
941±98
(694±72)
M27 P=3
431±39
(318±29)
353±39
(260±29)
941±98
(694±72)
765±78
(564±58)
1700±167
(1250±123)
1370±137
(1010±101)
1

11. TOOLS
11-4
11.1.2 Metric Fine Thread Standard Tightening Torque values. Make certain to tighten all Capscrews &
Nuts to proper torque values.
M30 P=3.5
588±59
(434±44)
490±49
(361±36)
1285±127
(948±94)
1079±108
(796±80)
2300±235
(1700±173)
1940±196
(1430±145)
M33 P=3.5
794±78
(586±58)
667±69
(492±51)
1726±177
(1270±131)
1451±147
(1070±108)
3110±314
(2290±232)
2610±265
(1930±195)
M36 P=4
1030±98
(760±72)
863±88
(637±65)
2226±226
(1640±167)
1863±186
(1370±137)
4010±402
(2960±297)
3360±333
(2480±246)
M8 P=1.0
11.3±1.1
(8.3±0.8)
9.5±1.0
(7.0±0.7)
24.5±2.0
(18.1±1.5)
20.6±2.0
(15.2±1.5)
44.1±3.9
(32.5±2.9)
37.3±3.9
(27.5±2.9)
M10 P=1.25
22.6±2.0
(16.7±1.5)
18.7±1.9
(13.8±1.4)
48.1±4.9
(35.5±3.6)
41.2±3.9
(30.3±2.9)
87.3±8.8
(64.4±6.5)
73.5±6.9
(54.2±5.1)
M12 P=1.25
39.2±3.9
(28.9±2.9)
33.3±2.9
(24.6±2.1)
85.3±8.8
(62.9±6.5)
71.6±6.9
(52.8±5.1)
154±16
(114±12)
129±13
(95.2±9.6)
M16 P=1.5
92.2±8.8
(68.0±6.5)
77.5±7.8
(57.2±5.8)
196±20
(145±15)
169±17
(125±13)
363±39
(268±29)
304±29
(224±21)
M20 P=1.5
186±19
(137±14)
155±16
(114±12)
402±39
(297±29)
333±29
(246±21)
726±69
(535±51)
608±59
(448±44)
M24 P=2
314±29
(232±21)
265±29
(195±21)
686±69
(506±51)
569±59
(420±44)
1240±118
(915±87)
1030±98
(760±72)
M30 P=2
637±59
(470±44)
530±49
(391±36)
1390±137
(1030±101)
1157±118
(853±87)
2500±255
(1840±188)
2080±206
(1530±152)
M33 P=2
853±88
(629±65)
706±70
(521±52)
1860±186
(1370±137)
1550±155
(1140±114)
3350±334
(2470±246)
2790±275
(2060±203)
M36 P=3
1070±108
(789±80)
892±88
(658±65)
2330±226
(1720±167)
1940±196
(1430±145)
4200±422
(3100±311)
3500±353
(2580±260)

11. TOOLS
11-5
11.2 SCREW AND TOOL SIZES
11.2.1 Capscrew
11.2.2 Capscrew (Socket bolt)
11.3 TORQUE SPECIFICATIONS FOR JOINTS AND HOSES
11.3.1 JOINTS FOR PIPING (O-RING SEALING TYPE)
11.3.2 HYDRAULIC HOSE (30° FLARE TYPE)
NOTE: The application of the tightening torque is subject to a dry condition.
Nominal
screw size
(d)
B mm Nominal
screw size
(d)
B mm
Tool size Tool size
M6 10 M24 36
M8 13 M30 46
M10 17 M36 55
M12 19 M42 65
M16 24 M48 75
M20 30
Nominal
screw size
(d)
B mm Nominal
screw size
(d)
B mm
Tool size Tool size
M6 5 M20 17
M8 6 M24 19
M10 8 M30 22
M12 10 M36 27
M14 12 M42 32
M16 14 M48 36
(M18) 14
Nominal screw size
(PF)
Spanner size
(mm)
Tightening torque
N•m (lbf•ft)
1 / 8 14 17±2 (12±1)
1 / 4 19 36±2 (27±1)
3 / 8 22 74±5 (54±4)
1 / 2 27 108±9.8 (80±7)
3 / 4 36 162±9.8 (119±7)
1 41 255±9.8 (188±7)
Nominal screw size
(PF)
Spanner size
(mm)
Tightening torque
N•m (lbf•ft)
1 / 8 17 15±2.0 (11±1)
1 / 4 19 29±4.9 (22±4)
3 / 8 22 49±4.9 (36±4)
1 / 2 27 78±4.9 (58±4)
3 / 4 36 118±9.8 (87±7)
1 41 137±15 (101±11)
B
d
d
B

11. TOOLS
11-6
11.4 TORQUE SPECIFICATIONS FOR SLEEVE TYPE TUBE FITTINGS
11.4.1 SLEEVE TYPE TUBE FITTINGS
Tube size
OD × Thickness (mm)
Spanner size
(mm)
Tightening Torque
N•m (lbf•ft)
10 × 1.5 19 44±4.9 (33±4)
15 × 2.0 27 147±20 (110±14)
18 × 2.5 32 177±20 (130±14)
22 × 3.0 36 216±20 (160±14)
28 × 4.0 41 275±29 (200±22)
35 × 5.0 55 441±44 (330±33)

11. TOOLS
11-7
11.5 SPECIAL SPANNERS FOR TUBES
11.6 SPECIAL TOOLS
11.7 APPLICATION OF SCREW LOCKING AND SEALING COMPOUNDS
Applicable tube diameter
mm (in)
Part No.
HEX
mm (in)
Dimensions of a special spanner
mm
15 (0.591)
27
(1.063)
18 (0.709)
32
(1.26)
22 (0.866)
36
(1.417)
28 (1.102)
41
(1.614)
Unit: mm (in)
No. Tools name Tools No. Shape Use
1
Torx driver
(with tamper
proof)
T25
(for M5)
—
For instrument
R.H cover
Service
Manufacturer
Features
Loctite Three-Bond
Screw locking compound
#242 1360 K Low strength
#262 1374 Middle strength
#271 1305 High strength
Sealing compound #515 1215 Sealing
4.4 (0.17")

11. TOOLS
11-8
11.8 COUNTERWEIGHT LIFTING JIG
Q’ty: 2 set
Material: Mild steel
UNIT: mm (in)
Fig. 11-1 Counterweight lifting jig
9
(0.35")
40
(1.57")
49
(1.93")
170 (6.69")
12
(0.47")
30(1.12")60
(2.36")
112
(4.41")
4-C
5(0.20")
10
(0.39")
70
(2.76")
R50
(1.97")
100
(3.94")
135 (5.32")
310 (12.2")
R150
(5.91")
R50(1.97")
40 (1.58")R
100(3.94")
477(18.8")
160 (6.30")
12
(0.47")
527(20.7")
(539){21.2"}
10
(0.39")
C
10
(0.39")
10
(0.39")
300(11.8")
50
(1.97")
3
(0.12")
20(4)-90
{0.79"(0.16")-3.54"}
3
(0.12")
24(0.95")

11. TOOLS
11-9
11.9 UPPER FRAME LIFTING JIG
Q’ty: 2 set
Material: Mild steel
UNIT: mm (in)
Fig. 11-2 Upper frame lifting jig
R
5
(0.20")
5
(0.20")
5
(0.20")
15
(0.59")
167
(6.58")
12
(0.47")
50
(1.97")50
(1.97")
50
(1.97")
2-C
20(0.79")
R30
(1.18")
R20
(0.79")
C25
(0.98")
C10(0.39")
244 (9.61") 16 (0.63")
16
(0.63")
310 (12.2")
40 (1.58")
470(18.5")
12 (0.47")
420(16.5")
(536){21.1"}
100
(3.94")
40(2)-100
{1.58"(0.079")-3.94"}
40(2)-120
{1.58"(0.079")-4.72"}
24(0.95")

12. STANDARD MAINTENANCE
TIME TABLE
TABLE OF CONTENTS
12.1 STANDARD WORKING TIME TABLE FOR THE MAINTENANCE
OF EXCAVATOR ............................................................................................12-4

12-1
12. STANDARD MAINTENANCE TIME
TABLE

12. STANDARD MAINTENANCE TIME TABLE
12-2

12-3
PREFACE
(1) Working Conditions
1) Technicians: One or more technicians qualified (with five years or more of field experience and having com-
pleted the training in the operation of vehicle type construction machinery) to be provided.
2) Facilities: General jigs, tools, apparatus, testers to be provided.
The maintenance workshop to be equipped with a good enough capacity of building with crane and inspec-
tion instruments necessary for specific self inspection activities.
3) Place: The workshop to be located on a flat land at which the work is able to perform and to which a service
car or truck crane is accessible.
(2) Applicable Range of Standard Maintenance Time
1) Standard maintenance time: Direct maintenance time plus spare time.
2) Direct maintenance time: Net time actually spent for maintenance.
3) Spare time: Time for transportation of the machine for maintenance, preparation for safety work, meeting for
the work and physiological time for the needs of body.
(3) Excluded Time (not included in the standard maintenance time)
1) Repairing time: Time for machining, sheet metal processing, welding, gas cutting, removing broken screw,
taking care of parts and painting.
2) Items excluded from maintenance time because of uncertainty in time:
Receiving the vehicle into shop, transportation, delivery, final inspection and investigation of causes for trou-
ble, diagnosis and inspection.
3) Indirect time: Time for field work, preparation of required parts, etc., before starting work, going to and from
the site, waiting due to user’s convenience at the site and paper work for reports, bills, etc.
4) Special time: Working time at early morning, at mid night and on holidays shall be separately calculated.
5) Separate calculation: The cost for service cars, trucks with crane and truck cranes shall be separately cal-
culated.
(4) Applicable Machine for Estimation of Standard Maintenance Time
1) Standard machine.
2) A well maintained machine combined with standard attachments which has operated in a normal circum-
stances.

12-4
12.1 STANDARD WORKING TIME TABLE FOR THE MAINTENANCE OF EXCAVA-
TOR
(1) Standard maintenance time table
1) Units of working time: 6 minutes = 0.1 hour
2) Calculating method of standard maintenance time:
Maintenance time = Working time × Number of workers
(Working time = Maintenance time / Number of workers)
3) When more than one work are done:
a. Add each standard maintenance time
b. A net time (readily starting) is given except covers easily removed by hand.
c. Assy works include the following works marked with black dot •
4) O / H: The removing and installing time are not included.
5) Abbreviations in the table.
(2) Classification of work code
ASSY : Assembly SOL : Solenoid Rem. : Removal
ATT : Attachment SW : Switch Inst. : Installation
BRG : Bearing V : Valve O/H : Overhaul
C/V : Control valve F hose: Flexible hose
Cyl : Cylinder E/G : Engine
No. GROUP REMARKS
01 Attachment To indicate removing, installing,
replacement and overhaul.02 Canopy and Guard
03 Upper Structure
04 Under carriage
GROUP
No.
EQUIPMENT PORTION
WORK TO
BE DONE
UNIT REMARKS
UNIT:
HOUR
01Attachment
00 Bucket portion Refer to 32.1.2
01 Bucket ASSY Rem.l/Inst. 1 pc. Include adjustment 0.4
02 • Bucket removing / installing position Preparation 1 pc. 0.1
03 • Bucket installing pin Rem./Inst. 1 pc. Include stopper pin. 0.1
04 • Bucket drive pin - ditto - 1 pc. 0.1
05 • Bucket sling and transfer Preparation 1 pc. 0.1
06 Bucket (Single) O/H 1 pc. Not include removal / inst. 0.6
07 • Bushing Replace 1 pc. 0.5
10 Arm portion Refer to 32.1.3
11 Arm ASSY Rem./Inst. 1 pc. 0.8
12
• Bucket cylinder removing / installing
position and piping
Preparation 1 pc. 0.2
13 • Bucket cylinder rod pin Rem./Inst. 1 pc. Include stopper pin. 0.1
14 • Bucket cylinder head pin - ditto - 1 pc. Include stopper pin. 0.1
15 • Bucket cylinder assy - ditto - 1 pc. 0.1
16 • Arm cylinder rod pin - ditto - 1 pc. Include stopper pin. 0.1
17 • Boom top pin - ditto - 1 pc. 0.1
18 • Arm sling and transfer - ditto - 1 pc. 0.1

12-5
01Attachment
20 Boom portion Refer to 32.1.4
21 Boom ASSY Rem./Inst. 1 pc. 1.0
22 • Boom removing / installing position Preparation 1 pc. 0.1
23 • Boom cylinder temporary slinging - ditto - 1 pc. 0.1
24 • Boom cylinder rod pin Rem./Inst. 1 pc. Include stopper pin. 0.1
25 • Boom cylinder piping - ditto - 1 pc. 0.1
26 • Arm & Bucket piping - ditto - 1 pc. 0.2
27 • Boom assy temporary slinging Rem. / Inst. 1 pc. 0.1
28 • Boom foot pin - ditto - 1 pc. Include stopper pin. 0.1
29 • Boom assy slinging - ditto - 1 pc. 0.1
30 Arm cylinder removing / installing - ditto - 1 pc. 0.3
31 • Arm cylinder piping - ditto - 1 pc. 0.1
32 • Arm cylinder head pin - ditto - 1 pc. Include stopper pin. 0.1
33 • Arm cylinder slinging - ditto - 1 pc. 0.1
40 Boom cylinder removing / installing - ditto - 1 pc. 0.3
41 • Boom cylinder piping - ditto - 1 pc. 0.1
42 • Boom cylinder head pin - ditto - 1 pc. 0.1
43 • Boom cylinder slinging - ditto - 1 pc. 0.1
50 Bucket cylinder O / H 1 pc. 2.5
51 • Pin bushing Replace 1 set Include seal. 1.0
60 Arm cylinder O / H 1 pc. 2.5
70 Boom cylinder O / H 1 pc. 2.5
80 Swing portion Refer to 32.1.5
81 Swing bracket assy Rem. / Inst. 1 pc. After removing boom. 0.4
82 • Swing cylinder rod pin - ditto - 1 pc. 0.1
83 • Swing bracket slinging - ditto - 1 pc. 0.1
84 • Swing center pin - ditto - 1 pc. 0.1
85 Swing cylinder removing / installing - ditto - 1 pc.
After removing swing brack-
et.
0.3
86 • Swing cylinder hose Rem. / Inst. 2 pcs. 0.2
87 • Swing cylinder head pin - ditto - 1 pc. 0.1
88 Swing cylinder O / H 1 pc. 2.5
89 • Pin bushing Replace 1 pc. Include seal. 1.0
Other necessary works Rem. / Inst. 1 set Panel assy (3) 0.1
90 Dozer portion Refer to 32.1.6
91 Dozer ASSY Rem. / Inst. 1 pc. 0.6
92 • Dozer cylinder hose - ditto - 2 pcs. 0.2
93 • Dozer cylinder rod pin - ditto - 1 pc. 0.1
94 • Dozer installing pin - ditto - 2 pcs. 0.2
95 Dozer cylinder O / H 1 pc. 2.5
GROUP
No.
EQUIPMENT PORTION
WORK TO
BE DONE
UNIT REMARKS
UNIT:
HOUR

12-6
02Canopy&Guard
00 Canopy portion Refer to 33.1.1
01 Canopy assy Rem. / Inst. 1 pc. 0.2
02 • Hand rail - ditto - 1 pc. 0.1
10 Cab portion Refer to 33.1.1
11 Cab assy Rem. / Inst. 1 pc. 0.4
12 • Harness - ditto - 1 pc. 0.1
20 Bonnet & Guard Refer to 33.1.2
21 Cover assy (1) Rem. / Inst. 1pc. 0.1
22 Bonnet assy (2) - ditto - 1pc. 0.1
23 Cover assy (3) - ditto - 1pc. 0.1
24 Cover assy (4) - ditto - 1pc. 0.1
25 Cover assy (5) Rem. / Inst. 1pc. 0.1
30 Control stand portion Refer to 33.1.14
31 Control stand ASSY Rem. / Inst. 1 pc. 1.0
32 • Air cleaner - ditto - 1 pc. 0.1
33 • E / G control cable - ditto - 1 pc. 0.2
34 • Deceleration motor (OPT) - ditto - 1 pc. 0.1
35 • Filler neck - ditto - 1 pc. 0.1
36 • Fuel air bleed hose - ditto - 1 pc. 0.1
37 • Harness - ditto - 1 set 0.3
Other necessary works Rem. / Inst. 1 set Canopy 0.2
- ditto - 1 set Floor cover 0.1
- ditto - 1 set Guard (Cover, support) 0.4
- ditto - 1 pc. Counterweight 0.4
- ditto - 1 pc. Negative terminal of battery 0.1
40 Floor plate portion Refer to 33.1.3
41 Floor plate assy Rem. / Inst. 1 set 0.5
Other necessary works - ditto - 1 pc. Canopy removal / inst 0.2
50 Counterweight portion Refer to 33.1.5
51 Counterweight ASSY Rem. / Inst. 1 pc. 0.4
52 • Lifting tools Preparation 1 set 0.1
53 • Slinging Rem. / Inst. 1 pc. 0.1
54 • Counterweight fixing bolt - ditto - 1 set 0.1
Other necessary works - ditto - 3 pcs. Guards 0.3
03Upperstructure
00 Control portion
01 E / G control cable Rem. / Inst. 1 pc. 0.2
02 Swing yoke - ditto - 1 pc. 0.1
03 Swing cable - ditto - 1 pc. 0.1
04 Other necessary works - ditto - 1 set Cover and Hose 0.4
10 Intake portion Refer to 33.1.11
11 Air cleaner ASSY Rem. / Inst. 1 pc. 0.3
12 • Hose (1) - ditto - 1 pc. 0.1
13 • Hose (2) - ditto - 1 pc. 0.1
14 • Element Replace 1 pc. 0.1
20 Exhaust portion Refer to 33.1.13
21 Muffler ASSY Rem. / Inst. 1 pc. 0.4
GROUP
No.
EQUIPMENT PORTION
WORK TO
BE DONE
UNIT REMARKS
UNIT:
HOUR

12-7
03Upperstructure
22 • Clamp - ditto - 1 pc. 0.1
23 • Exhaust manifold attaching nuts - ditto - 4 pcs. 0.1
24 • Muffler fixing bolt - ditto - 4 pcs. 0.1
Other necessary works - ditto - 1 set Heat insulation cover 0.1
30 E / G Accessory portion Refer to 33.1.12 & 33.1.15
31 Generator Rem. / Inst. 1 pc. 0.6
32 • Connector - ditto - 1 pc. 0.1
33 • Generator fixing bolt - ditto - 2 pcs. 0.1
34 • V-belt - ditto - 1 pc. Include tension adjusting 0.3
Other necessary works - ditto - 1 set Covers 0.1
36 Starter Rem. / Inst. 1 pc. 0.5
37 • B-terminal - ditto - 1 pc. 0.1
38 • S-terminal connector - ditto - 1 pc. 0.1
39 • Starter fixing bolt - ditto - 2 pcs. 0.2
Other necessary works - ditto - 1 set Cover and Floor plate 0.1
- ditto - 1 set Seat and Stand cover 0.3
40 Fuel portion Refer to 33.1.9
41 Fuel tank ASSY Rem. / Inst. 1 pc. 0.6
42 • Fuel Replace 1 pc. 0.2
43 • Hose (Supply; water separator side) Rem. / Inst. 1 pc. 0.1
44 • Hose (Return; filter side) - ditto - 1 pc. 0.1
45 • Level sensor connector - ditto - 1 pc. 0.1
46 • Fuel tank fixing bolt - ditto - 4 pcs. 0.1
Other necessary works - ditto - 1 pc. Covers 0.2
50 Hydraulic oil tank portion Refer to 33.1.10
51 Hydraulic oil tank ASSY Rem. / Inst. 1 pc. After removing fuel tank ; 1.6
52 • Return filter Replace 1 pc.
Include pressure releasing
& replacing O-ring
0.2
53 • Hydraulic oil - ditto - 1 pc. 0.2
54 • Suction hose Rem. / Inst. 1 pc. 0.2
55 • Strainer Replace 1 pc. Include replacing O-ring 0.1
56 • Pilot return hose Rem. / Inst. 1 pc. 0.1
57 • Swivel drain hose - ditto - 1 pc. 0.1
58 • SOL. valve return hose - ditto - 1 pc. 0.1
59 • Slewing, C / V return hose - ditto - 2 pcs. 0.2
60 • Tank fixing bolt - ditto - 4 pcs. 0.2
Other necessary works - ditto - 1 pc. Covers 0.2
- ditto - 1 pc. Control valve 1.6
- ditto - 1 pc. Solenoid valve 0.1
Preparation 1 pc. Hyd. oil tank pressurizing 0.1
70 Pump portion Refer to 33.1.6
71 Pump ASSY Rem. / Inst. 1 pc.
After removing counter-
weight
1.2
72 • Hydraulic oil Replace 1 pc. Include pressure releasing 0.2
73 • Pilot delivery oil hose Rem. / Inst. 1 pc. 0.1
GROUP
No.
EQUIPMENT PORTION
WORK TO
BE DONE
UNIT REMARKS
UNIT:
HOUR

12-8
03Upperstructure
74 • Suction hose - ditto - 1 pc. 0.2
75 • Suction tube (pump side) - ditto - 1 pc. 0.2
76 • Main pump delivery hose - ditto - 3 pcs. 0.2
77 • Pump fixing bolt - ditto - 2 pcs. 0.2
78 Pump ASSY O / H 1 pc. 3.0
Other necessary works Feed 1 pc. Hyd. oil in pump 0.1
Preparation 1 pc. Hyd. oil tank pressurizing 0.1
80 Radiator portion Refer to 33.1.16
81 Radiator ASSY Rem. / Inst. 1 pc. 1.2
82 • Coolant (LLC) Replace 1 pc. 0.2
83 • • Coolant density Measuring 1 pc. (0.2)
84 • Reserve tank hose Rem. / Inst. 1 pc. 0.1
85 • Radiator hose - ditto - 2 pcs. 0.2
86 • Cooler hose - ditto - 2 pcs. 0.2
87 • Radiator fixing bolt - ditto - 3 pcs. 0.1
88 • Radiator lifting or slinging - ditto - 1 pc. 0.1
Other necessary works - ditto - 1 pc. Counterweight 0.4
- ditto - 1 set Covers 0.2
- ditto - 1 pc. Duct 0.1
90 Engine (E / G) Installing portion Refer to 33.1.17
91 Engine ASSY Rem. / Inst. 1 pc. 1.0
92 • Fuel hose - ditto - 4 pcs.
For injection pump - 2 pcs. &
For feed pump - 2 pcs.
0.2
93 • Harness, connector and cable Rem. / Inst. 1 set 0.3
94 • Engine fixing nut - ditto - 1 pc. 0.2
95 • Engine slinging - ditto - 1 set 0.2
Other necessary works - ditto - 1 set Covers 0.2
- ditto - 1 pc. Canopy 0.2
- ditto - 1 set Control stand 1.0
- ditto - 1 pc. Air cleaner 0.2
- ditto - 1 pc. Muffler 0.4
- ditto - 1 pc. Pump 1.2
- ditto - 1 pc. Radiator 1.0
- ditto - 1 pc. Battery negative terminal 0.1
100 Control valve portion Refer to 33.1.7
101 Control valve ASSY Rem. / Inst. 1 pc. 1.6
102 • Piping connector, hose - ditto - 1 set
Include attaching hose’s tag
and plug
1.0
103 • Control cable, Yoke - ditto - 1 set 0.2
104 • Fixing bolt - ditto - 1 set 0.1
105 Control valve ASSY O / H 1 pc. 3.0
Other necessary works Rem. / Inst. 1 set Covers 0.1
- ditto - 1 set Hoses 0.2
110 Slewing motor portion Refer to 33.1.19
111 Slewing motor ASSY Rem. / Inst. 1 pc. 1.0
GROUP
No.
EQUIPMENT PORTION
WORK TO
BE DONE
UNIT REMARKS
UNIT:
HOUR

12-9
03Upperstructure
112 • Piping connector, hose - ditto - 7 pcs.
and plug
0.5
113 • Fixing bolt - ditto - 1 pc. 0.3
114 Slewing motor ASSY O / H 1 pc. 3.0
Other necessary works Rem. / Inst. 1 set Floor plate, Covers 0.2
Feed 1 pc. Hyd. oil in motor 0.1
120 Swivel joint portion Refer to 33.1.20
121 Swivel joint ASSY Rem. / Inst. 1 pc.
After removing slewing mo-
tor
2.5
122 • Under cover - ditto - 1 pc. 0.1
123 • Piping connector, hose - ditto - 1 set
and plug
1.5
124 • Stopper - ditto - 1 pc. 0.1
125 • Fixing bolt - ditto - 1 set 0.2
126 Swivel joint ASSY O / H 1 pc. 2.0
Other necessary works Preparation 1 pc.
Removal / Inst. position.
(Secure working space.)
0.1
1 pc.
Canopy removal / inst.
(for easy working)
0.2
1 pc.
Floor plate cover (2) remov-
al / inst.
0.1
130 Upper frame portion Refer to 33.1.21
131 Upper frame ASSY Rem. / Inst. 1 pc. 1.0
132 • Fixing bolt - ditto - 1 set Apply sealant 0.3
133 • Upper frame slinging - ditto - 1 pc. 0.3
134 • Cleaning Cleaning 1 pc. 0.2
Other necessary works Rem. / Inst. 1 pc. Canopy 0.2
- ditto - 1 pc. Guard (Cover, support) 1.5
Drain / Feed 1 pc. Hydraulic oil 0.2
Rem. / Inst. 1 set Swivel joint hose 0.5
- ditto - 1 set Boom, Swing bracket 1.5
04Undercarriage
00 Travel portion Refer to 34.1.2
01 Rubber crawler Rem. / Inst. One side 0.6
02 • Rubber shoe removing / inst. position. Preparation One side 0.1
03 • Tension adjusting Adjusting One side 0.2
04 • Crawler shoe Rem. / Inst. One side 0.2
10 Upper roller portion Refer to 34.1.3
11 Upper roller ASSY Rem. / Inst. 1 pc. After removing crawler shoe 0.2
12 Upper roller O / H 1 pc. 1.0
20 Lower roller portion Refer to 34.1.6
21 Lower roller ASSY Rem. / Inst. 1 pc. 0.2
22 Lower roller O / H 1 pc. 1.0
30 Front idler & Idler adjuster portion Refer to 34.1.7 & 34.1.8
31 Idler & Idler adjuster ASSY Rem. / Inst. One side After removing crawler shoe 0.5
32 Idler & Idler adjuster ASSY O / H One side 0.1
GROUP
No.
EQUIPMENT PORTION
WORK TO
BE DONE
UNIT REMARKS
UNIT:
HOUR

12-10
04Undercarriage
33 Idler ASSY O / H One side 1.0
34 Idler adjuster ASSY - ditto - One side 0.5
40 Sprocket portion Refer to 34.1.9
41 Sprocket Replace One side
After removing crawler shoe
0.5
50 Travel motor portion Refer to 3 34.1.10
51 Travel motor ASSY Rem. / Inst. One side After removing crawler shoe 1.0
52 • Motor cover - ditto - One side 0.1
53 • Hydraulic connector, hose - ditto - One side
and plug
0.6
54 • Motor fixing bolt - ditto - One side 0.3
55 • Motor slinging - ditto - One side 0.1
56 Travel motor O / H One side 3.0
57 Travel reduction unit - ditto - One side 3.0
Other necessary works Feed One side Hyd. oil in motor 0.1
60 Slewing bearing portion Refer to 34.1.11
61 Slewing bearing ASSY Rem. / Inst. 1 pc. After removing upper frame 0.6
62 • Slewing bearing fixing bolt - ditto - 1 pc. 0.3
63 • Slewing bearing Cleaning 1 pc. Decreasing / Replenishment 0.1
64 • Slewing bearing slinging Rem. / Inst. 1 pc. 0.2
GROUP
No.
EQUIPMENT PORTION
WORK TO
BE DONE
UNIT REMARKS
UNIT:
HOUR

13. MAINTENANCE STANDARDS AND
TEST PROCEDURES
TABLE OF CONTENTS
13.1 HOW TO USE MAINTENANCE STANDARDS AND PRECAUTIONS ...........13-3
13.2 PERFORMANCE INSPECTION STANDARD TABLE ....................................13-5
13.2.1 STANDARD VALUE TABLE ..................................................................13-5
13.3 MEASURING ENGINE SPEED .......................................................................13-7
13.3.1 ENGINE SPEED MEASUREMENT .......................................................13-7
13.4 MEASURING HYDRAULIC OIL PRESSURE .................................................13-9
13.4.1 STANDARD FOR HYDRAULIC OIL PRESSURE MEASUREMENT .....13-9
13.4.2 PRESSURE MEASUREMENT AND ADJUSTMENT .............................13-9
13.5 MEASURING TRAVEL PERFORMANCES ..................................................13-13
13.5.1 TRAVEL ...............................................................................................13-13
13.5.2 TRAVEL DEVIATION ...........................................................................13-13
13.5.3 MOVEMENT DRIFT DUE TO GRAVITY .............................................13-14
13.5.4 DRAIN RATE ON TRAVEL MOTOR ....................................................13-14
13.6 MEASURING SLEW PERFORMANCES ......................................................13-15
13.6.1 SLEW TIME .........................................................................................13-15
13.6.2 OVERRUN WHEN SLEWING STOPS ................................................13-15
13.6.3 SLEW DRIFT DUE TO GRAVITY ........................................................13-15
13.6.4 DRAIN RATE OF TRAVEL MOTOR ....................................................13-16
13.7 MEASURING ATTACHMENT OPERATING PERFORMANCES ..................13-17
13.7.1 CYLINDER SPEED ..............................................................................13-17
13.7.2 GRAVITY DRIFT OF CYLINDERS ......................................................13-18
13.8 MEASURING SLEW BEARING PERFORMANCES .....................................13-19
13.8.1 SLEW BEARING-BUCKET TIP PLAY .................................................13-19
13.8.2 SLEW BEARING PLAY ........................................................................13-19
13.9 MEASURING CRAWLER TENSION .............................................................13-20
13.9.1 CRAWLER TENSION ..........................................................................13-20

13-1
13. MAINTENANCE STANDARDS AND
TEST PROCEDURES

13. MAINTENANCE STANDARDS AND TEST PROCEDURES
13-2

13-3
13.1 HOW TO USE MAINTENANCE STANDARDS AND PRECAUTIONS
(1) Application
1) For New Machine:
This manual is to be used to check the actual performance and functions of the machine compared with the
PERFORMANCE STANDARDS.
2) At Specific Self-Inspection (as per LOCAL RULES);
The maintenance standards are used to make them as the criteria to determine the time for reconditioning,
adjustment and replacement.
3) At Deterioration of Performance;
This manual is of the criteria of safe and economical judgment whether the deterioration of performance on
the machine would be caused by any faults or normal deterioration due to machine operation for a long pe-
riod.
4) For Replacement of Major Components;
This manual is of the standard to determine the time for replacement to recover the performance of major
components such as pump, etc.
(2) Terminology
1) Standard Values:
These are of the standard values to assemble and regulate a new machine. Where special notes are not
given, these values are based on the machine with standard structure (the machine with standard attach-
ments and shoes).
2) Standard Values for Repair:
These are of the values at which the reconditioning is required.
In order to ensure the performance and safety, it is strictly prohibited to use the machine with the parts and
components being over the standard values.
3) Serviceability Limit:
This is of the service limit for each part and component at which the reconditioning is impossible and they
must be replaced to new ones.
All the parts and components which are estimated to exceed the serviceability limit up to the next periodical
inspection and maintenance, should be also replaced to new ones.
The machine operation with the parts and components which have exceeded the serviceability limit, causes
increase of troubles and down time of the machine, and also causes safety problems.
(3) Precautions for Judgment:
1) Evaluation for Measured Data:
It is inevitable some variation on the measured data due to differences between measuring conditions, pe-
culiar variability on a new machine, old and new versions of the machine and measuring characteristics.
The judgment for the measured data should be comprehensively conducted based on the extent of level of
the measured data, instead of mere comparison with the standard values.
2) Determination for Reconditioning, Adjustment or Replacement:
There are two kinds of deterioration of machine performance; one is due to normal wear with time elapsing
of operation, and the other is recoverable to the standard values with the adjustment for pressure, etc.
Therefore, the determination for reconditioning, adjustment or replacement should be conducted taking var-
ious factors into consideration such as operating hours, working conditions and maintenance conditions of
the machine, so that the machine is able to be operated at the optimum performance level.
(4) Other Precautions
1) Parts with Aging Effect:
The rubber products such as hydraulic hoses, O-rings, oil seals, etc. are deteriorated with the aging effect.
It is necessary to replace them to new ones at periodical intervals or at every overhaul.
2) Parts required Periodical Replacement:
It is recommendable to designate the important hoses critical to secure the safety as Very Important Parts
(V.I.P.), and periodically replace with new ones.

13-4
3) Inspection & Replacement of Lubricants:
It is necessary for the user of the machine to fully familiarize himself with the procedures and precautions to
handle the machine in safe and carry out the maintenance, as well as the procedures for inspection and lu-
brication. Refer to the OPERATION & MAINTENANCE MANUAL as well.

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