service manual download

1. 0-1
FOREWORD
1. STRUCTURE
This service manual has been prepared as an aid to improve the quality of repairs by giving the
serviceman an accurate understanding of the product and by showing him the correct way to perform
repairs and make judgements. Make sure you understand the contents of this manual and use it to
full effect at every opportunity.
This service manual mainly contains the necessary technical information for operations performed in
a service workshop.
For ease of understanding, the manual is divided into the following sections.
SECTION 1 GENERAL
This section explains the safety hints and gives the specification of the machine and major
components.
SECTION 2 STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an
understanding of the structure, but also serves as reference material for troubleshooting.
SECTION 3 HYDRAULIC SYSTEM
This section explains the hydraulic circuit, single and combined operation.
SECTION 4 ELECTRICAL SYSTEM
This section explains the electrical circuit, monitoring system and each component. It serves not
only to give an understanding electrical system, but also serves as reference material for trouble
shooting.
SECTION 5 MECHATRONICS SYSTEM
This section explains the computer aided power optimization system and each component.
SECTION 6 TROUBLESHOOTING
This section explains the troubleshooting charts correlating problems to causes.
SECTION 7 MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.
SECTION 8 DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling
each component, as well as precautions to be taken for these operations.
The specifications contained in this shop manual are subject to change at any time and without any
advance notice. Contact your HYUNDAI distributor for the latest information.

2. 0-2
Revised edition mark(‫ںڹڸ‬š)
When a manual is revised, an edition mark is
recorded on the bottom outside corner of the
pages.
Revisions
Revised pages are shown at the list of revised
pages on the between the contents page and
section 1 page.
Symbols
So that the shop manual can be of ample
practical use, important places for safety and
quality are marked with the following symbols.
2. HOWTO READTHESERVICEMANUAL
Distribution and updating
Any additions, amendments or other changes
will be sent to HYUNDAI distributors.
Get the most up-to-date information before you
start any work.
Filing method
See the page number on the bottom of the
page.
File the pages in correct order.
Following examples shows how to read the
page number.
Example 1
2 - 3
Item number (2. Structure and
Function)
Consecutive page number for
each item.
Additional pages : Additional pages are
indicated by a hyphen(-) and number after the
page number. File as in the example.
1.
2.
3.
Symbol Item Remarks
Special safety precautions are
necessary when performing the
work.
Extra special safety precautions
are necessary when performing
the work because it is under
internalpressure.
Special technical precautions or
other precautions for preserving
standards are necessary when
performingthework.
Safety
Caution
Ɠ
10 - 4
10 - 4 - 1
10 - 4 - 2
10 - 5
Added pages

3. 0-3
3. CONVERSIONTABLE
Method of using the Conversion Table
The Conversion Table in this section is provided to enable simple conversion of figures. For details of
the method of using the Conversion Table, see the example given below.
Example
Method of using the Conversion Table to convert from millimeters to inches
Convert 55mm into inches.
Locate the number 50 in the vertical column at the left side, take this as ‫ڞ‬, then draw a
horizontal line from ‫ڞ‬.
Locate the number 5 in the row across the top, take this as ‫ڟ‬, then draw a perpendicular line
down from ‫ڟ‬.
Take the point where the two lines cross as ‫ڠ‬. This point ‫ڠ‬ gives the value when converting
from millimeters to inches. Therefore, 55mm = 2.165 inches.
Convert 550mm into inches.
The number 550 does not appear in the table, so divide by 10(move the decimal point one place
to the left) to convert it to 55mm
Carry out the same procedure as above to convert 55mm to 2.165 inches.
The original value (550mm) was divided by 10, so multiply 2.165 inches by 10(move the decimal
point one place to the right) to return to the original value.
This gives 550mm = 21.65 inches.
1.
2.
(1)
(2)
(3)
(1)
(2)
(3)
Millimeters to inches 1mm = 0.03937 in
‫ڟ‬
‫ڞ‬
0 1 2 3 4 5 6 7 8 9
0 0.039 0.079 0.118 0.157 0.197 0.236 0.276 0.315 0.354
10 0.394 0.433 0.472 0.512 0.551 0.591 0.630 0.669 0.709 0.748
20 0.787 0.827 0.866 0.906 0.945 0.984 1.024 1.063 1.102 1.142
30 1.181 1.220 1.260 1.299 1.339 1.378 1.417 1.457 1.496 1.536
40 1.575 1.614 1.654 1.693 1.732 1.772 1.811 1.850 1.890 1.929
50 1.969 2.008 2.047 2.087 2.126 2.165 2.205 2.244 2.283 2.323
60 2.362 2.402 2.441 2.480 2.520 2.559 2.598 2.638 2.677 2.717
70 2.756 2.795 2.835 2.874 2.913 2.953 2.992 3.032 3.071 3.110
80 3.150 3.189 3.228 3.268 3.307 3.346 3.386 3.425 3.465 3.504
90 3.543 3.583 3.622 3.661 3.701 3.740 3.780 3.819 3.858 3.898
‫ڠ‬

4. 8-47
1. REMOVAL AND INSTALL OF MOTOR
REMOVAL
Lower the work equipment to the ground
and stop the engine.
Operate the control levers and pedals
several times to release the remaining
pressure in the hydraulic piping.
Loosen the breather slowly to release the
pressure inside the hydraulic tank.
Escaping fluid under pressure can
penetrate the skin causing serious injury.
When pipes and hoses are disconnected,
the oil inside the piping will flow out, so
catch it in oil pan.
Disconnect hose assembly(2, 3).
Disconnect pilot line hoses(4, 5, 6, 7, 8, 9,
10, 11).
Sling the swing motor assembly(1) and
remove the swing motor mounting bolts
(12).
Motor device weight : 107kg(235lb)
Tightening torque : 10.5kgf ft(76lbf ft)
Remove the swing motor assembly.
When removing the swing motor
assembly, check that all the piping have
been disconnected.
INSTALL
Carry out installation in the reverse order
to removal.
Bleed the air from the swing motor.
Remove the air vent plug.
Pour in hydraulic oil until it overflows from
the port.
Tighten plug lightly.
Start the engine, run at low idling and
check oil come out from plug.
Tighten plug fully.
Confirm the hydraulic oil level and check
1)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
GROUP 5 SWING DEVICE
2)
(1)
(2)
(3)
1
2
3
11
4
5
6
7
12
8
9 10

5. 8-48
2. DISASSEMBLY AND ASSEMBLY OF SWING MOTOR
STRUCTURE
1)
1 Inner ring
2 Oil seal
3 Taper roller bearing
4 Backing spring
5 Cam plate
6 Return plate
7 Piston assembly
8 Lining plate
9 Friction plate
10 O-ring
11 O-ring
12 Level gauge assembly
13 Spring
14 Parallel pin
15 O-ring
16 Cap
17 Coned disc spring
18 Teflon ring
19 Bushing
20 Balance plate
21 Needle bearing
22 Piston
23 Snap ring
24 Cylinder assembly
25 Plug
26 Housing
27 Bypass valve assy
28 Back up ring
29 O-ring
30 O-ring
31 Cover
32 Time delay valve
33 Hexagon socket bolt
34 Cap
35 Back up ring
36 O-ring
37 Spring
38 Check valve
39 Relief valve assembly
40 Hexagon socket bolt
2 3 4 5 6 7 8 9 10 11 12
13
14
15
16
26 25 24 23 22 21 20 19
17
18
1 28,29
27 30 31 32 33
36
40
38
39 37 35,36 34

6. 8-49
DISASSEMBLY
Removal of relief valve assembly
Remove cap of relief valve assembly(39)
with 14mm hexagonal wrench.
Assemble removed relief valve assembly
(39) to original state when reassembling.
Removal of make up valve and bypass
valve assembly
Loosen cap(34) with 14mm hexagonal
wrench, and remove check valve(38) and
spring(37).
Remove bypass valve assembly(27) with
10mm hexagonal wrench.
Assemble removed bypass valve
assembly(27) to original state when
reassembling.
Marking at swing motor
Before disassembling motor, make a
matching mark between cover(31) and
housing(26) for easy reassembling.
Remove mounting bolts of cover
Loosen hexagon socket bolt(40) with
12mm hexagonal wrench.
(1)
2)
(2)
(3)
(4)

7. 8-50
Remove snap ring(23) with steel pointer
and remove inner race of needle-
bearing(21) by bearing puller.
Remove balance plate
Balance plate(20) is adhered on end
surface of cylinder(24) by oil viscosity.
Take off balance plate(20) with hands.
Assembling method of balance plate(20)
depends on cover(31).
(Band groove and round groove of
high low pressure transmission area)
Before removing, check and record
location of balance plate(20) to prevent
misassembling.
Removal of cover assembly
Place shaft of motor assembly to
downward and take cover(31) out.
(5)
(6)
(8)
Remove O-ring(11) from cover.
(7)

8. 8-51
Removal of spring(13, break area)
Remove spring(13) from piston(22).
Check and record original position of each
spring(13) for correct assembling.
Removal of brake piston
When removing piston(22) from housing
(26), there is a sliding resistance against
tightening of O-rings(10,11). Use tap
hole(M6) on piston(22) as shown in the
picture.
Remove O-rings(10,11) from piston(22)
and housing(26).
Remove bushing(19) and coned disk spring
(17) from teflon ring(18).
(9)
(10)
(11)
(12)

9. 8-52
Separate outer race of taper roller
bearing(3) from housing.
Remove friction plate(9) and lining plate
(8) from housing(26).
Removal of cylinder assembly
Holding end of cylinder assembly(24) with
hand, draw out cylinder assembly from
housing.
Oil seal(2) and outer race of taper roller
bearing(3) are left inside of housing.
End surface of cylinder(24) is sliding face .
So, protect the surface with a scrap of cloth
against damage.
Make a matching mark on piston hole of
cylinder(24) and piston assembly(7) to fit
piston into the same hole when
reassembling.
Removal of oil seal
Remove oil seal(2) from housing(26) with
driver and hammer.
Do not reuse oil seal after removal.
(16)
(13)
(14)
(15)

10. 8-53
Disassembly of cylinder assembly
Removal of inner race of taper roller
bearing(3).
Lift out cylinder(24) with 2 inner race of
roller bearing(3) by applying gear puller at
the end of spline in the cylinder.
Separate cam plate(5), piston assembly
(7), return plate(6) from cylinder(24).
Get cam plate(5) slide on sliding face of
piston assembly(7) and remove it.
Be cautious not to damage on sliding
face of cam plate.
Remove backing spring(4) from cylinder
(24).
This completes disassembly.
(17)

11. 8-54
ASSEMBLY
Preparation
Before reassembling, perform below
procedure.
Check each part for damage caused by
using or disassembling. If damaged,
eliminate damage by grinding with proper
sandpaper, wash them with cleaning oil
and dry with compressed air.
Replace seal with new one.
Grind sliding face of piston assembly(7),
balance plate(20) and cam plate(5) with
sandpaper #2000.
When assembling, lubricate with
specified clean hydraulic oil.
When assembling piston assembly(7) to
piston hole of cylinder(24), check
matching mark between them.
3)
(1)

12. 8-55
Assembly of cylinder assembly
Lubricate grease on round area
(Contacting area with spring(4)) of
cylinder(24) and assemble spring(4).
(2)
Assemble piston assembly(7) and return
plate(6) to cylinder(24). When
assembling, check matching mark
between them. Before assembling,
lubricate specified hydraulic oil in piston
hole of cylinder(24).
Lubricate specified hydraulic oil on shoe
sliding face of piston assembly(7) and
assemble cam plate(5).
Insert piston assembly(7) in hole of return
plate(6).

13. 8-56
Assemble inner race of taper roller
bearing(3) to cylinder(24).
Assemble inner race(1) to cylinder(24).
Apply loctite to bearing mounting area of
inner race of cylinder(24) lightly.
Assembly of oil seal
Apply three bond of white color on outer
surface of oil seal(2) and assemble and
insert it.
Before assembling, lubricate lip of oil seal
with grease.
T
LO C I T E
15
5
(3)

14. 8-57
Assembly of cylinder assembly
Hold end of cylinder assembly(24) with
hands and assemble cylinder assembly to
housing(26). Be careful to prevent
damage of seal by spline of shaft.
When assemble cylinder assembly, spline
shaft of cylinder is protruded from end of
housing, therefore put pads with length
30~50mm under bottom of housing.
Assemble plate(9) and lining plate(8).
Lubricate specified hydraulic oil on each
side.
Insert O-rings(10,11) into housing(26) and
piston(22).
Lubricate O-ring with grease.
Assemble outer race of taper roller
bearing(3) to motor housing(26).
(4)
(5)
(6)
(7)

15. 8-58
Assembly of spring(13, brake unit)
Assemble spring(13) to piston(22) of
brake unit.
Insert spring(13) into original position.
Assemble bushing(19) with teflon ring(18)
and coned disk spring(17) to bushing hole
of cover(31).
Lubricate on both end surfaces of
bushing(19) and outer face of teflon
ring(18) with grease and assemble cover
to housing, and parts are adhered on
cover by grease viscosity which makes
assembling easy.
Assembly of brake piston
Lubricate specified hydraulic oil on outer
sliding face of piston(22) and assemble
brake piston to housing(26).
It is too tight to assemble piston(10)
because O-rings(10,11) are fitted,
therefore it is recommended to push
piston(22) horizontally by hands at once.
(8)
(9)
(10)
Lubricate locating pin for antirotation of
balance plate(20) of cover(31) with grease
sufficiently and install locating pin to
housing.
(11)

16. 8-59
Assemble O-ring(11) to cover(31).
Lubricate O-ring with grease.
Apply three bond of white color to
distinguish oil leakage from remaining oil
in bolt hole(M16) of cover(31).
Assembly of balance plate
Assemble balance plate(20) to cover(31).
Be cautious of assembling direction.
(12)
(14)
(15)
Assemble inner race of needle bearing
(21) and snap ring(23) to cover(31).
(13)

17. 8-60
Assembly of make up valve
Assemble check(38) and spring(37) to
cover(31) and tighten cap(34) with 14mm
hexagonal socket bolt.
Tightening torque : 14kgf m(101lbf ft)
Assembly of bypass valve assembly
Assemble bypass valve assembly(27) to
cover(31) with 10mm hexagonal socket bolt.
Tightening torque : 8kgf m(58lbf ft)
Assembly of relief assembly
Assemble relief valve assembly(39) to
cover(31) with 14mm hexagonal socket
bolt.
Tightening torque : 8kgf m(58lbf ft)
Be cautious of assembling direction.
Assembly of cover
Assemble cover(31) and balance plate
(20) to housing(26) lightly, holding them
up with hands.
When assembling, be careful not to
detach balance plate(20) and bushing
(19) from cover(31).
Fit matching marks on housing(26) and
cover(31) made before disassembling.
Tighten cover(31) and housing(26) with
16mm hexagonal socket bolt(40).
Tightening torque : 16kgf m(115lbf ft)
(16)
(17)
(18)
(19)
(20)

18. 8-61
Check of assembly
Load pilot pressure of 40kgf cm2
to brake
release port after opening inlet and outlet
port.
Check if output shaft is rotated smoothly
around torque of 2~3kgf m.
If not rotated, disassemble and check.
This completes assembly.
(21)

19. 8-62
3.REMOVALANDINSTALLOFREDUCTIONGEAR
REMOVAL
Remove the swing motor assembly.
For details, see removal of swing motor
assembly.
Slide reduction gear assembly(1) and
remove mounting bolts(2).
Remove the reduction gear assembly.
Motor device weight : 107kg(235lb)
Tightening torque : 29.6 3.2kgf m
(214 23lbf ft)
INSTALL
Carry out installation in the reverse order
to removal.
1
2
(1)
(2)
(3)
1)
2)
(1)

20. 8-63
4. DISASSEMBLY AND ASSEMBLY OF REDUCTION GEAR
STRUCTURE
1 Pinion shaft
2 Collar
3 Snap ring
4 Plate
5 Roller bearing
6 Gear cashing
7 Collar
8 Snap ring
9 Oil seal
10 Roller bearing
11 Holder 2
12 Collar
13 Planetary gear 4
14 Ring gear
15 Holder assy 1
16 Sun gear
17 Spring washer
18 Lock bolt
19 Shaft assy 1
20 Planetary gear 2
21 Thrust plate 1
22 Shaft 2
23 Bushing
24 Planetary gear 5
25 Thrust plate 2
26 Spring pin
27 Plug
28 Plug
29 Plug
13
3
1 2 4 5 6 7 8 9 10 11 12 14
15
16
17 18
24 23 22 21 20 19
25
26
28 27
29
1)

21. 8-64
DISASSEMBLY
Removal of sun gear and 1st holder
assembly
Remove sun gear(16) and holder assembly
1(15) itself.
Removal of planetary gear 4 and 2nd
holder assembly
Remove planetary gear 4(13) and holder
assembly 2(11) itself.
Disassembly of 2nd holder assembly
Insert spring pin(26) into shaft 2(22) by
hammering.
Do not reuse spring pin after removal.
Remove shaft 2(22) from holder 2(11),
planetary gear 5(24) with hands.
2)
(1)
(2)
(3)

22. 8-65
Removal of pinion shaft assembly
Remove snap ring(3) through hole of
gear casing(6) with (-) driver.
Press end face of pinion shaft(1) with
hydraulic press to gain space(Approx.
200mm) needed for removing pinion shaft
at flange part of gear casing, and remove
pinion shaft(1), collar(2,7), plate(4), roller
bearing(5), collar(7) as assembly.
Do not reuse oil seal(9) after removal.
(5)
Remove collar(12) concurrently.
Removal of ring gear
Remove ring gear(14) from casing(6).
Fluid packing is applied on contacting
face of ring gear and gear casing.
Therefore, remove ring gear through tap
hole of gear casing with hammer.
(4)

23. 8-66
Remove roller bearing(5), plate(4) and
collar(2) by pressing output pinion shaft
(1) and end face of the other side.
Exchange pinion shaft assy if they have
defect.
This completes disassembly.
Disassembly of pinion shaft assembly
Remove snap ring(8) and collar(7) from
pinion shaft(1).
(6)
Remove roller bearing(10) from gear
casing(6).
Remove oil seal(9) from gear casing(6).

24. 8-67
ASSEMBLY
Assembly of pinion shaft assembly
Insert collar(2) into pinion shaft(1) and
assemble plate(4).
Be cautious of assembling direction.
Heat roller bearing(5) up to 50 C plus
surrounding temperature and assemble it
to pinion shaft(1).
Heat roller bearing up more than 100 C.
3)
(1)
Insert collar(7) and snap ring(8) to pinion
shaft(1).
Be cautious of assembling direction.
Lubricate on outer face of roller bearing
(5) with grease.
Capacity : 200cc

25. 8-68
Installation of oil seal
Remove oil from assembled face of oil
seal of gear casing(6) and oil seal(9).
Apply fluid packing(Three bond of white
color) on outer face of oil seal and
assemble at pressing jig of gear casing.
After inserting with press, lubricate on oil
seal lip with grease.
(2)
Put pinion shaft of gear casing(6)
upward.
Assemble pinion shaft assembly to gear
casing by tightening eye bolt into tap
hole(M8) of output side of pinion shaft(1).
Assembly of pinion shaft assembly
Be careful lest oil seal lip damage by
spline of pinion shaft(1).
Assemble pinion shaft assembly by using
seal guide.
Assemble snap ring(3).
When assembling, loosen cutting place
of snap ring about 30mm from connections
of gear casing for easy disassembly.
(3)

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27. 8-69
Assembly of roller bearing
Put gear casing under pinion shaft. Heat
inner race of roller bearing(10) up to 50 C
plus surrounding temperature and
assemble to center of pinion shaft.
Assemble roller bearing by putting
between gear casing and pinion shaft.
(4)
Assembly of holder assembly
Assemble bushing(23) to planetary gear
5(24).
Insert shaft 2(22) after thrust plate 2(25)
and bushing(23) to holder 2(11).
Lubricate gear oil to inside of gear and
outside of shaft.
Insert spring pin(26) by hammering.
Insert as the clearance between spring
pins toward planetary gear 5(24).
(5)
Assembly of ring gear
Remove oil from mating faces between
gear casing(6) and ring gear(14), and
from collar(12). Assemble pin to gear
casing and apply fluid packing(Three
bond of grey color).
(6)

28. 8-70
Assembly of sun gear and 1st holder
assembly
Insert holder assembly being engaged
with internal teeth of ring gear(14).
Rotate holder assembly lightly so that
planetary gear 4(13) is engaged with
teeth of holder assembly 1(15).
(8)
Assembly of 2nd holder assembly and
planetary gear 4
Insert holder assembly being engaged
with internal teeth of ring gear(14).
Rotate holder assembly lightly so that
splines of pinion shaft(1) are engaged.
Insert planetary gear 4(13) to planetary
gear 5(24).
(7)
Assemble ring gear(14).

29. 8-71
Check rotation of sun gear by turning 1st
holder assembly with hands.
This completes assembly.
Insert sun gear(15) to planetary gear
2(20).
(9)