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1. SERVICE MANUAL
EXCAVATOR
JCB140
EN - 9823/0350 - ISSUE 1 - 05/2018
This manual contains original instructions, verified by
the manufacturer (or their authorized representative).
Copyright 2018 © JCB SERVICE
All rights reserved. No part of this publication may
be reproduced, stored in a retrieval system, or
transmitted in any form or by any other means,
electronic, mechanical, photocopying or otherwise,
without prior permission from JCB SERVICE.
www.jcb.com
Foreword
The Operator's Manual
You and others can be killed or seriously injured
if you operate or maintain the machine without
first studying the Operator's Manual. You must
understand and follow the instructions in the
Operator's Manual. If you do not understand
anything, ask your employer or JCB dealer to
explain it.
Do not operate the machine without an Operator's
Manual, or if there is anything on the machine you
do not understand.
Treat the Operator's Manual as part of the machine.
Keep it clean and in good condition. Replace the
Operator's Manual immediately if it is lost, damaged
or becomes unreadable.
Contents
01 - Machine
03 - Attachments, Couplings and Load
Handling
06 - Body and Framework
09 - Operator Station
12 - Heating, Ventilating and Air-
Conditioning (HVAC)
15 - Engine
18 - Fuel and Exhaust System
21 - Cooling System
27 - Driveline
30 - Hydraulic System
33 - Electrical System
72 - Fasteners and Fixings
75 - Consumable Products
78 - After Sales

2. 06 - Body and Framework
15 - Excavator End
15 - Tipping Linkage
06 - 15 9823/0350-1 06 - 15
15 - Tipping Linkage
Check (Condition) .......................................... 06-15
Remove and Install ....................................... 06-16
Check (Condition)
1. Check all the link bushes and the pivot pins for
wear or damage, replace as necessary.
2. Some tipping levers incorporate a lifting eye.
This feature is classified as lifting equipment and
must be tested and certified to comply with local
regulations.

3. 06 - Body and Framework
15 - Excavator End
15 - Tipping Linkage
06 - 16 9823/0350-1 06 - 16
Remove and Install
Special Tools
Description Part No. Qty.
Slide Hammer Kit 993/68100 1
Consumables
Description Part No. Size
4003/1501 0.4 kg
4003/1506 12.5 kg
Special MPL-EP
Grease
4003/1510 50 kg
Remove
1. Make the machine safe with the excavator arm
lowered.
Refer to: PIL 01-03.
2. Remove the bucket.
3. Support the bucket and ram links.
4. Remove the locknuts 1 and bolt 1. Refer to Figure
14.
5. Use a slide hammer to drive out the ram pivot pin
1. Refer to Figure 14.
Refer to: PIL 06-30-00.
6. Retract the bucket ram clear of the tipping
link.Refer to Figure 14.
7. Remove the locknuts 2 and bolt 2.Refer to Figure
14.
8. Use a slide hammer to drive out the dipper pivot
pin 2.Refer to Figure 14.
9. Remove the tipping link. Refer to Figure 14.
10. Clean all the links and pivot pins.
Special Tool: Slide Hammer Kit (Qty.: 1)
11. Check all the link bushes and the pivot pins for
wear or damage. Replace as necessary.

4. 06 - Body and Framework
15 - Excavator End
15 - Tipping Linkage
06 - 17 9823/0350-1 06 - 17
Figure 14.
A
D
P
N
E
F
G
J
KL
M
H
C
B
A Bolt clearance dimension B Dipper
C Bucket ram D Pivot pin 3
E Tipping link F Pivot pin 1
G Locknuts 1 H Bolt 1
J Link arm K Locknuts 2
L Bolt 2 M Pivot pin 2
N Bolt 3 P Locknuts 3
CAUTION! Do not use your fingers through the holes
to align the links.
Install
1. The installation procedure is the opposite of the
removal procedure. Additionally do the following
steps.
2. Replace bushes as required. Refer to Figure 15.

5. 06 - Body and Framework
15 - Excavator End
15 - Tipping Linkage
06 - 18 9823/0350-1 06 - 18
3. Replace all O-rings and seals with new
components. Refer to Figure 15.
4. Make sure to install all components correctly.
Refer to Figure 15.
Figure 15.
14
14
14
13
6
16
10
10
6
8
2
3 3
11
11
1
1
9
3
3
1112
11 12
15
18
1 Shim 2 Tipping link
3 Grease nipple 4 Label
6 Pivot pin 8 Link arm - left
9 Link arm - right 10 Bolt
11 Dust seal 12 O-ring
13 O-ring 14 Locknut
15 Pivot pin 16 Pivot pin
18 Bolt
5. Apply grease to all the pivot pins before
assembly.
5.1. Apply grease to the pivot points through the
grease nipples.
Consumable: Special MPL-EP Grease
6. Make sure to check the bolt and nut clearance
dimension. The dimension should be as stated.
To adjust this dimension move the locknuts.
Refer to Figure 14.
Dimension: 1 –2 mm

6. 06 - Body and Framework
24 - Slew Ring
06 - 19 9823/0350-1 06 - 19
24 - Slew Ring
Contents Page No.
06-24-00 General ........................................................................................................................... 06-21
06-24-03 Bearing ........................................................................................................................... 06-22
06-24-06 Gear ............................................................................................................................... 06-26

7. 06 - Body and Framework
24 - Slew Ring
00 - General
06 - 21 9823/0350-1 06 - 21
00 - General
Introduction
The slew ring bearing is a rotational rolling-element
bearing that supports the heavy but slow-turning
upper structure. They often use three race elements,
such as an inner ring and two outer ring halves that
clamp together axially. Slew ring bearings are made
with gear teeth integral with the inner or outer race,
used to drive the platform relative to the base.

8. 06 - Body and Framework
24 - Slew Ring
03 - Bearing
06 - 22 9823/0350-1 06 - 22
03 - Bearing
Check (Condition) .......................................... 06-22
Lubricate ........................................................ 06-24
Check (Condition)
Check slew bearing backlash
1. Fully extend the dipper and set the bucket the
specified distance above the ground.
Length/Dimension/Distance: 1 m
2. Attach a DTI (Dial Test Indicator) to lower the half
of the slew bearing and set needle to bolt head
on top half of the slew bearing.
3. Stop the engine. By hand push bucket fully to one
side and hold whilst dial test indicator is set to
zero.
4. By hand push bucket fully to other side and
record measurement on the DTI. Check against
limits given in the table.
Figure 16.
A
A DTI
Alternatively
1. Fully extend the dipper and set the bucket the
specified distance above the ground.
Length/Dimension/Distance: 1 m
2. Stop the engine.
3. By hand push bucket fully to one side and hold
whilst a mark is made across the two halves of
slew bearing.
4. By hand push bucket fully to other side and hold,
make a further mark on bottom half of bearing
(which is in line with original mark on top half
of bearing). Record measurement and check
against limits given in the table.

9. 06 - Body and Framework
24 - Slew Ring
03 - Bearing
06 - 23 9823/0350-1 06 - 23
Table 2. Slew backlash limits
Machines New machine Limit of use
100, 200 and
300 series
6 mm 12 mm
70, 80, and 81
series
4 mm 8 mm
Check the slew bearing vertical lift
1. First set the dipper in a perpendicular position
and position the bucket to the specified height
from above the ground. Stop the engine.
Distance: 200 mm
Figure 17.
A
A DTI
2. Install a DTI and set the needle to the zero point.
Figure 18. Zero pointing setting
3. Start the engine and lift the main body with the
bucket, when the bottom of the shoe is above
of the ground at the specified height, note the
reading on the DTI.
Distance: 100 mm
Figure 19.
3.1. The needle will turn in the counter clockwise
direction. This value becomes L1, lower the
body to the ground and confirm the needle
reads zero.
4. Rotate the main body to the specified angle and
repeat the procedure, this time the needle will
rotate clockwise. This value becomes L3.
Angle: 180 °
Figure 20.
5. Place a DTI on the rear of the vehicle and do the
step 3 and the step 4 again to obtain L2 and L4.

10. 06 - Body and Framework
24 - Slew Ring
03 - Bearing
06 - 24 9823/0350-1 06 - 24
Figure 21.
6. The average lateral movement is, sum of
L1,L2,L3 and L4 then divided the sum amount
with two.
Figure 22.
Table 3. Slew vertical lift
New machine Limit of use
1.2 mm 3.6 mm
Always stop the engine when installing or removing
the dial gauge or reading the dial gauge.
Lubricate
Grease the slew ring bearing at the intervals given in
the maintenance schedule. Refer to: PIL 78-24. Use
the correct grease. Refer to: PIL 75-00-00.
1. Make the machine safe with the excavator arm
lowered.
Refer to: PIL 01-03.
2. Apply grease at the grease points using a
suitable grease gun.
2.1. The slew ring bearing has three grease
points distributed equally around the slew
ring.
2.2. On some machines two of the grease
points have remote grease points / nipples
connected to the slew ring bearing with
grease lines. Make sure that the grease line
mountings are installed and secure. Make
sure that the grease lines and adaptors are
free from defects such as splits or kinks.
2.3. Make sure that grease extrudes from under
the seal around all of the circumference of
the slew ring bearing. It is not possible to
add too much grease.
2.4. Make sure grease is applied at all the
grease points.

11. 06 - Body and Framework
24 - Slew Ring
03 - Bearing
06 - 25 9823/0350-1 06 - 25
Figure 23. Typical greasing installation
7
3
2
2
1
5
4
6
1 Revolving chassis
2 Grease point / nipple
3 Slew ring bearing
4 Grease line (if installed)
5 Grease line mountings (if installed)
6 Remote grease points / nipples (if installed)
7 Grease point / nipple

12. 06 - Body and Framework
24 - Slew Ring
06 - Gear
06 - 26 9823/0350-1 06 - 26
06 - Gear
Lubricate
Ensure slew ring is kept full of grease. Always grease
whenever the machine has been steam-cleaned.
Lubricate the slew ring pinion and gear teeth as
follows.
1. Prepare the machine for maintenance.
Refer to: PIL 01-03.
2. Grease the slew ring as follows.
2.1. Remove the inspection port cover (on the
lower centre section).
2.2. Remove the grease discharge port cover
(on the lower inner side).
2.3. Remove contaminated grease.
2.4. Replace the discharge port cover.
2.5. Apply grease to the slew ring via aperture.
3. Start the engine and slew the machine a few
degrees. Stop the engine, remove the starter key
and apply grease again.
3.1. Repeat until the whole ring is greased.
3.2. Check that grease exudes around the entire
circumference.
4. Refit the inspection port cover.
Figure 24.
C
A
B
A Inspection port cover
B Discharge port cover
C Aperture

13. 06 - Body and Framework
30 - Pivot Pins
06 - 27 9823/0350-1 06 - 27
30 - Pivot Pins
Contents Page No.
06-30-00 General ........................................................................................................................... 06-29

14. 06 - Body and Framework
30 - Pivot Pins
00 - General
06 - 29 9823/0350-1 06 - 29
00 - General
Introduction .................................................... 06-29
Remove and Install ....................................... 06-30
Introduction
Pivot pins are a short shaft or pin that supports
something that turns. Pivot pins are installed in
numerous positions on the machine. There is usually
a greasing point associated with the pivot pin.
Make sure that the pivot points are greased at
regular intervals. Refer to the Machine Maintenance
Schedules. Refer to: PIL 78-24.
Slide Hammer Kit
The slide hammer kit is used to remove pivot pins that
must be extracted, i.e. cannot be 'knocked through'.
The purpose of this description is to explain how the
kit and the various components are used to remove
the pivot pins.
The adaptors that form part of the kit have a screwed
thread at each end. One of the threads will always
be M20 size, this is to accommodate the end stops.
The other end of the adaptor will have varying thread
sizes to suit the different size of threads in the pivot
pins.

15. 06 - Body and Framework
30 - Pivot Pins
00 - General
06 - 30 9823/0350-1 06 - 30
Remove and Install
Special Tools
Description Part No. Qty.
Slide Hammer Kit 993/68100 1
Make a note that the illustration shows a typical pivot
pin. The actual pivot pin installed on the machine may
look different.
1. Prepare the pivot pin for removal, remove the
locking device e.g. pivot pin retaining bolt.
2. Prepare the slide hammer kit.
Special Tool: Slide Hammer Kit (Qty.: 1)
2.1. Install the slide hammer onto the slide bar.
2.2. Determine the thread size of the pivot pin
and then install the appropriate adaptor.
Use the spanner flats to securely install the
adaptor.
2.3. Install an end stop onto the other end of the
adaptor (M20 thread size), make sure that
the adaptor threads are fully engaged.
2.4. Install the slide bar into the end stop. Make
sure that the threads are fully engaged.
2.5. Finally install the other end stop at the end
of the slide bar. The slide hammer kit is now
ready to use.
3. To extract the pivot pin, slide the hammer along
the bar until it contacts the end stop. Repeat this
step until the pivot pin is released.
4. To remove the slide hammer kit, reverse steps 2
to 3.
Figure 25. Typical Machine
C
A Adaptor
B End stop
C End stop
D Spanner flats
E Slide bar
F Slide hammer

16. 06 - Body and Framework
63 - Identification Label
06 - 31 9823/0350-1 06 - 31
63 - Identification Label
Contents Page No.
06-63-00 General ........................................................................................................................... 06-33
06-63-03 Machine .......................................................................................................................... 06-34
06-63-15 Operator Protective Structure ........................................................................................ 06-35

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18. 06 - Body and Framework
63 - Identification Label
00 - General
06 - 33 9823/0350-1 06 - 33
00 - General
Introduction
The machine has identification plates that contain
important information relating to the specific machine
details, for example VIN or PIN number and engine
serial number. These serial numbers can help you
identify exactly what equipment has been installed
on the machine.

19. 06 - Body and Framework
63 - Identification Label
03 - Machine
06 - 34 9823/0350-1 06 - 34
03 - Machine
Introduction
Your machine has an identification plate. The
PIN (Product Identification Number), weight, engine
power, year of manufacture and serial number of the
machine are shown on the identification plate.
The machine serial number is also inscribed at the
baseplate of the rear frame.
Figure 26.
A
B
A Identification plate (location)
B Serial number (inscribed)
The machine model and build specification are
indicated by the PIN. The PIN has 17 digits and must
be read from left to right.
Table 4. Typical PIN
JCB JD14B/
JE14B
L 01536000
Table 5. Explanation of the PIN
Digit Description
1 to 3 World manufacturer identification.
(JCB)
4 to 8 Machine type and model. For exam-
ple, JD14B = JCB140 Tracked.
9 Random check letter. The check let-
ter is used to verify the authenticity of
a machine's PIN.
10 to 17 Machine serial number.
Figure 27.
A
A Identification plate

20. 06 - Body and Framework
63 - Identification Label
15 - Operator Protective Structure
06 - 35 9823/0350-1 06 - 35
15 - Operator Protective Structure
Introduction
WARNING Machines with a ROPS, FOPS,FOGS
or TOPS are equipped with a seat belt. The
ROPS, FOPS,FOGS or TOPS is designed to give
you protection in an accident. If you do not wear
the seat belt you could be thrown off the machine
and crushed. You must wear a seat belt when
using the machine. Fasten the seat belt before
starting the engine.
WARNING Modified and wrongly repaired ROPS,
TOPS and FOGS are dangerous. Do not modify
the TOPS. Do not attempt to repair the ROPS,
TOPS and FOGS. If the ROPS, TOPS and
FOGS has been in an accident, do not use the
machine until the structure has been examined
and repaired. This must be done by a qualified
person. For assistance, contact your JCB dealer.
Failure to take precautions could result in death
or injury to the operator.
FOGS Data Plate
WARNING Do not use the machine if the falling
objects protection level provided by the structure
is not sufficient for the application. Falling objects
can cause serious injury.
If the machine is used in any application where there
is a risk of falling objects then a FOGS (Falling
Object Guard System) must be installed. For further
information, contact your JCB dealer.
Each element of the FOGS has a data plate attached.
The data plate indicates what level of protection the
structure provides.
There are two levels of FOGS:
• Level I Impact Protection - impact strength
for protection from small falling objects
(e.g. bricks, small concrete blocks, hand
tools) encountered in operations such as
highway maintenance, landscaping and other
construction site services.
• Level II Impact Protection - impact strength for
protection from heavy falling objects (e.g. trees,
rocks) for machines involved in site clearing,
overhead demolition or forestry.
Figure 28.
The cab mounted FOGS available for the JS
excavator range are tested to ISO 10262 level 2 and
comply with EN 13627:2000.
The frame mounted FOGS available for the JS
excavator range are tested to ISO 3449 level 2 and
comply with EN 13627:2000.
ROPS Data Plate
WARNING Your machine may be installed with a
Roll-Over Protective Structure (ROPS) indicating
that the purchaser specified the machine for use
in applications where there is risk of roll-over.
ROPS is a device to protect the operator in the
event of roll-over. Any damage or modification
to the structure may invalidate the ROPS
certification. If damage has occurred then an
authorised JCB dealer should be consulted.
An excavator with a ROPS (Roll-Over Protective
Structure) can be identified by referring to the
cab identification plate. Work place (work site, job
site) risk assessment should facilitate the machine
selection and the need for an excavator with a ROPS.
Figure 29.
TOPS Data Plate
An excavator with a TOPS (Tip-Over Protective
Structure) can be identified by referring to the
cab identification plate. Work place (work site, job
site) risk assessment should facilitate the machine
selection and the need for an excavator with a TOPS.
Figure 30.
XXXX
XXXX
XXXX
XXXX
XXXX

21. 06 - Body and Framework
63 - Identification Label
15 - Operator Protective Structure
06 - 36 9823/0350-1 06 - 36
Figure 31.