Jcb tm420 telescopic wheel loader service repair manual sn 2454001 and up

SERVICE MANUAL
LOADER
TM320, TM420
EN - 9813/6850 - ISSUE 2 - 04/2018
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
24 - Brake System
25 - Steering System
27 - Driveline
30 - Hydraulic System
33 - Electrical System
72 - Fasteners and Fixings
75 - Consumable Products
78 - After Sales

27 - Driveline
06 - Semi-Automatic Gearbox
12 - Clutch - Ratio
27 - 126 9813/6850-2 27 - 126
12 - Clutch - Ratio
Disassemble and Assemble
Special Tools
Description Part No. Qty.
Circlip Assembly Tool 998/11334 1
Main shaft clutch
Disassembly
The numerical sequence is a guide to the
disassembly procedure.
1. Remove and discard the O-ring seals 1.
2. To check the clutch plates.
2.1. Remove the circlip1 from the clutch drum.
2.2. Lift off the thick pressure counter plate then
the seven friction plates and seven counter
plates.
3. Remove and check the roller bearing race. If
necessary discard it.
4. Use either the circlip assembly tool or a tube of
suitable diameter to install over the top spring
cup.
Special Tool: Circlip Assembly Tool (Qty.: 1)
Figure 567.
A
A Tube
5. Cut out a small portion of the tube, to allow
access, to release the circlip 2.
6. With the clutch drum located in the press,
compress the spring sufficiently to allow the
circlip 2 to be released.
7. When the circlip 2 is released, remove it from the
shaft with the spring cup, spring and the lower
spring cup.
8. If necessary the clutch operating piston may be
removed by compressed air blown through the
drilling in the end of the clutch shaft.
9. Remove and discard the clutch piston O-ring seal
2 and seal 3.

27 - Driveline
12 - Clutch - Ratio
27 - 127 9813/6850-2 27 - 127
Figure 568.
B
R
S
M
Q
P
N
K
G
F
D
C
L
J
H
E
Table 242.
Item Description
B Circlip 1
C Thick pressure counter
plate
D Friction plate
E Counter plate
F Roller bearing race
Item Description
G Upper spring cup
H Circlip 2
J Spring
K Lower spring cup
L Piston
M Clutch shaft
N O-ring seal 2

27 - Driveline
12 - Clutch - Ratio
27 - 128 9813/6850-2 27 - 128
Item Description
P O-ring seal 3
Q Housing
R Gallery port
S O-ring seal 1
Assembly
Assembly is the opposite of the disassembly
procedure with the following precautions.
1. Install the new clutch piston O-ring seals 2 and
seal 3 to the piston.
2. Lubricate the new seals and push the piston into
the housing by hand.
3. Put the lower spring cup over the central spigot
of the piston.
4. Replace the spring and the top spring cup.
5. Keep the circlip 2 on the top cup ready for
installation.
6. Use the tube with a cutout to compress the
spring.
7. Locate the cutout to give access for circlip 2.
8. Install the circlip 2 and make sure that it is seated
correctly in the groove.
9. New clutch friction plates must be soaked in oil
before assembly.
10. Install the first counter plate to the clutch drum
followed by the friction plate.
11. Alternately install all fourteen plates.
12. Use a scrap splined drive hub to align the splines
of the friction plates.
13. Install the thick counter plate at the top of the
assembly followed by the circlip 1.
14. Check the free play clearance of the clutch plates
and it must be within the specified limit.
Dimension: 3 –3.5 mm
15. You can adjust the clearance by either changing
the thick pressure plate from 6.0mm (0.24in)
thick version to 6.5mm (0.26in) thick or by
the addition of a shim counter plate installed
immediately under the thick pressure plate.
16. Once the clutch is assembled completely then
apply compressed air to the gallery port in the
end of the shaft to check the clutch operation.
Ratio Clutches
Disassembly
1. For the remaining two ratio clutches follow the
same disassembly procedure as above.
2. The only difference is the retention of the support
taper roller bearing which for each clutch is held
in place by a machined cap.
Assembly
1. Clutch 1 and clutch 2 assembly.
1.1. Use a mandrel to carefully push the taper
bearing 1 into its position.
1.2. Rotate the roller cage as the bearing is
pushed into place to make sure that the
mandrel does not foul and distort the cage.
1.3. Put the new O-ring seal 4 into the grooves
in the cap 1.
Figure 569.
W
V
U
T
X
T Taper bearing 1
U O-ring sea l4
V Cap 1
W Capscrews 1
X O-ring seals 5
1.4. Two capscrews 1 hold the cap 1 in place.
1.5. Tighten the capscrews 1 to the correct
torque value.
1.6. Put two new O-ring seals 5 into the groves
in cap 1.

27 - Driveline
12 - Clutch - Ratio
27 - 129 9813/6850-2 27 - 129
2. Clutch 3 and clutch 4 assembly.
2.1. Use a mandrel to carefully push the taper
bearing 2 into its position.
2.2. Rotate the roller cage as the bearing is
pushed into the place to make sure that the
mandrel does not foul and distort the cage..
2.3. Put the new O-ring seal 6 into the grooves
in the cap 2.
Figure 570.
Y
Z
AA
AC
AB
Y Taper bearing 2
Z O-ring seal 6
AA Cap 2
AB Capscrews 2
AC O-ring seals 7
2.4. Two capscrews 2 hold the cap 2 in place.
2.5. Tighten the capscrews 2 to the correct
torque value.
2.6. Put two new O-ring seals 7 into the groves
in cap 2.
Table 243. Torque Values
Item Description Nm
W Capscrews1 18
AB Capscrews2 45

27 - Driveline
13 - Clutch - Master
27 - 130 9813/6850-2 27 - 130
Remove and Install ..................................... 27-130
Disassemble and Assemble ........................ 27-136
Remove and Install
Special Tools
Clutch Pack Retainers 892/01048 2
Mandrel 892/01050 1
Locking Plates 892/01052 2
Consumables
Description Part No. Size
JCB Multi-Gasket 4102/1212 0.05 L
Remove
1. Put the gearbox on a suitable manipulator.
Rotate the gearbox until the clutch is in the top
position.
2. Remove all the cover attaching bolts and then
install the M10 jacking bolts1 (x3).
3. Screw all the jacking bolts evenly until the cover
is clear of its spigot.
Figure 571.
G
A
BC
E
B
F
D
A Cover attaching bolts (x18)
B M10 jacking bolts1 (x3)
C Cover
D M10 threaded lifting eye (x2)
E Oil seal2
F Cover O-ring seal
G O-ring1 seal
4. Install the M10 threaded lifting eyes to lift the
cover.

27 - Driveline
27 - 131 9813/6850-2 27 - 131
5. Carefully lift off the cover and make sure that you
keep it square to the housing.
6. Make sure that you remove and discard all the
O-ring1 seals.
7. Remove the jacking bolt.
8. Remove and discard the cover O-ring seal.
9. Prise out and discard the oil seal2 carefully and
make sure that the seal housing in the cover is
not damaged.
10. Install the special locking plates to prevent the
clutch assembly from rotating.
Special Tool: Locking Plates (Qty.: 2)
Figure 572.
AH
H
J
K
L
A Cover attaching bolts (x18) H Special screws
J Clutch assembly K Special locking plate
L Housing
11. Use the cover attaching bolts and the special
screws that are supplied with the locking plates,
to lock the clutch assembly to the housing.
12. Remove all the clutch drum bolts.

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27 - 132 9813/6850-2 27 - 132
Figure 573.
M
N
P Q
M Clutch drum bolts (x12)
N Plug1
P M8 threaded lifting eye (x2)
Q Clutch drum
13. Remove the locking plate.
14. Install the M8 threaded lifting eyes to the clutch
drum.
15. Attach suitable lifting equipment to the clutch
drum.
16. Carefully remove the clutch drum, hub and the
pressure plate assembly.
17. Install the special pack retainers to the clutch
plate carrier.
Special Tool: Clutch Pack Retainers (Qty.: 2)
Figure 574.
R
U
T
S
V
R Special pack retainers (x2)
S Clutch plates
T Thrust washer1
U Plate carrier
V Thrust washer2
18. Remove the carrier together with the clutch
plates and the thrust washer1.
19. Remove the thrust washer2.
20. Remove the button head capscrews.
21. Remove the oil baffle plate.
22. Rotate the drum carrier to align the five holes with
countersunk capscrews.
23. Remove the countersunk capscrews.

27 - Driveline
27 - 133 9813/6850-2 27 - 133
Figure 575.
Y
M
W
M
Z
L
X
Z
AA
AB
M Clutch drum bolts (x12)
L Housing
W Button head capscrews (x5)
X Oil baffle plate
Y Countersunk capscrews
Z JCB multigasket
AA Drum carrier
AB M10 jacking bolts2 (x3)
24. Install the M10 jacking bolts2 and jack the drum
carrier to remove it from the housing.
25. Make sure that you install the drum bolts that
will assist you to lift the drum carrier clear of the
housing.
26. The drum carrier will be removed completely with
the PTO (Power Take-Off) input gear and the
bearing.
27. It is not necessary to remove the clutch housing
unless it is damaged or the PTO/splitter gearbox
needs to be disassembled.
Figure 576.
L
Z
AD
AC
AB
L Housing
Z JCB multigasket
AB Verbus-ripp bolts (x12)
AC O-ring2
AD Cross drilling blanking plug2
28. The clutch house removal.
28.1. Remove and discard all the Verbus-ripp
bolts.
28.2. Use a soft faced hammer to separate the
housing from the PTO/splitter gearbox.
28.3. Remove the clutch housing.
29. After you remove the clutch from the housing
there will be three main sub assemblies.
29.1. Remove the Clutch drum, hub and
pressure plate sub-assembly. Refer to
Figure 577.

27 - Driveline
27 - 134 9813/6850-2 27 - 134
Figure 577.
29.2. Remove the clutch plates and plate carrier
sub-assembly. Refer to Figure 578.
Figure 578.
29.3. Remove the clutch drum carrier and input
gear PTO sub-assembly.
Figure 579.
Install
Installation is the opposite of the removal procedure
but make sure that additionally you follow the
instructions below.
1. If it is necessary to replace the clutch housing
with a new one then make sure that the cross
drilling blanking plug2 is installed to the new
housing.
2. Tighten the plug2 to the correct torque value.
3. Make sure that the oil feed cross drillings are
clear.
4. Carefully clean all the traces of the sealing
compound from the clutch and the smoothshift
gearbox housing mating surfaces.
5. Lightly lubricate with oil and install a new O-ring2.
6. Apply even beads of JCB Multigasket to the
Smoothshift Gearbox housing (around the outer
diameter and around each threaded bolt hole).
Consumable: JCB Multi-Gasket
7. Make sure that you install new Verbus-ripp bolts.
8. Tighten the Verbus-ripp bolts to the correct
torque value.
9. Make sure that the clutch components are
carefully checked for any signs of wear or
damage.
10. If any of the friction or counter plates are
damaged or if any of the friction plates are
excessively worn (thickness less than 3.5 mm or
oil grooves less than 0.1 mm deep) replace the
complete set of plates.

27 - Driveline
27 - 135 9813/6850-2 27 - 135
11. Make sure that the new friction plates are soaked
in transmission oil before you install them.
12. Check the thrust washer2 for any signs of wear.
13. If the thickness (3.9mm) or the outside diameter
(110.0mm) is less then the mentioned value then
install a new thrust washer2.
14. Before you install the new thrust washer2 soak it
in the transmission oil for at least an hour.
15. Do not apply any kind of thread locking
compound to any of the bolts or screws.
16. Tighten the plug1s to the correct torque value to
prevent oil gallery leakage.
17. It is not possible to locate the clutch drum over
the clutch plates and carrier assembly inside the
housing.
18. First sub-assemble the components on the
bench and then use the retainers to hold the
assembly together.
19. Before you replace the drum, plates, carrier and
hub assembly install the two guide pins to the
M10 threaded holes in the drum carrier.
20. Use a special mandrel to install the new oil seal2.
Special Tool: Mandrel (Qty.: 1)
21. If the clutch plates are replaced with new ones,
check to make sure that the clutch is disengaged
before installing the cover 2.
22. Lightly apply oil and install a new O-ring1 and the
cover O-ring.
Table 244. Torque Values
Item Description Nm
A Cover attaching bolt 56
M Clutch drum bolt 52
W Button head capscrews 12
Y Countersunk capscrews 38
N Plug1(Black) 22
N Plug1(Gold) 12
AB Verbus-ripp bolt 75
AD Cross drilling blanking plug2 15

27 - Driveline
27 - 136 9813/6850-2 27 - 136
Disassemble and Assemble
Special Tools
Peg Socket 892/01045 1
Mandrel 892/01046 1
Clutch Jig 892/01047 1
Clutch Pack Retainers 892/01048 2
Guide Rods 892/01049 2
Slide Hammer Kit 993/68100 1
Consumables
Description Part No. Size
4101/0250 0.01 LJCB Threadlocker
and Sealer (Medium
Strength)
4101/0251 0.05 L
Master Clutch- Clutch Drum and Hub
Disassembly
1. Remove the lubrication nozzles.
2. Remove the bolts.
3. Remove the release springs and the spring
pillars then discard the springs.
4. Remove the oil baffle plate from the locating
dowel 1.
5. Remove the pressure plate.
6. Make sure that you do not lose the dowel 1 and
dowel 2
7. Remove the piston from the drum.
8. Use M6 bolt (x2) and suitable levers to help in
removal of the piston.
9. Remove and discard the outer seal from the
piston.
10. Remove the socket head capscrews (x8).
11. Use a suitable bar to prevent drum rotation.
12. Use a soft faced hammer to tap out the hub from
the drum.
13. Remove and discard the O-ring 1 from the drum.
14. Remove the circlip.
15. Use a suitable drift to tap out the blanking disc
together with the inner bearing.
16. Remove and discard the O-ring 2.
17. Remove and discard the iron sealing ring.
18. Remove and discard the inner piston seal from
the hub.
19. Do not remove the outer bearing unless it is to be
replaced with a new one.
20. At the time of removal the bearing can be
damaged. When the bearing is removed it must
be replaced.
21. To remove the outer bearing, screw in two jacking
bolts at their correct location on the hub.
22. If the bronze bush is to be replaced, then remove
it with a suitable puller and slide hammer.
Special Tool: Slide Hammer Kit (Qty.: 1)

27 - Driveline
27 - 137 9813/6850-2 27 - 137
Figure 580.
A
H
K
L
K
H
Y
X
B
V
N
Q
R
P
L
Z
Z
T
S
U
Y
W
D
C
E
F
L
J
M
W
G

27 - Driveline
27 - 138 9813/6850-2 27 - 138
Table 245.
Item Description
A Lubrication nozzles
B Bolts
C Springs
D Spring pillars
E Oil baffle plate
F Pressure plate
G Piston
H Drum
J Outer seal
K Socket head capscrews
(x8)
L Hub
M O-ring 1
N Circlip
P Blanking disc
Q Inner bearing
R O-ring 2
S Sealing ring
Item Description
T Inner piston seal
U Outer bearing
V Bronze bush
W M8 bolt (x2)
X Dowel 1
Y Dowel 2
Z Jacking bolts (x2)
Assembly
Assembly is the opposite of the disassembly
procedure but additionally follow the steps below.
1. Check that the oil feed slots and drillings are
clear.
2. Check the condition of the pressure plate, if it is
excessively scored then replace with a new one.
3. If it is necessary to replace the pressure plate,
dowel 1 and dowel 2 must be installed to the plate
before assembly.

27 - Driveline
27 - 139 9813/6850-2 27 - 139
Figure 581.
A
H
K
X
B
Y
Y
W
D
C
E
F
L
J
M
W
G
A Lubrication nozzles B Bolts
C Springs D Spring pillars
E Oil baffle plate F Pressure plate
G Piston H Drum
J Outer seal K Socket head capscrews (x8)
L Hub M O-ring 1
W M8 bolt (x2) X Dowel 1
Y Dowel 2
4. The larger dowel 2 must be tapped into the blind
holes on one face of the plate and the smaller
dowel 1 must be tapped onto the through holes
on the opposite face so that they reach through
the plate but do not protrude.
5. Check the faces of the drive tangs on the drum
and if you find any small burrs then carefully use
a file to remove the small burrs.
6. Check the pressure relief ball valve in the piston,
the ball should be free to move against its spring.
7. Check the pressure relief valve for leakage.
Refer to Figure 582.
7.1. Put a drop of paraffin in the orifice of the
valve.

27 - Driveline
27 - 140 9813/6850-2 27 - 140
Figure 582.
AC
AC Valve orifice
7.2. There should not be any leakage on the
other side of the ball.
7.3. If there is leakage then the piston or the
valve assembly must be replaced with a
new one.
8. If the bronze bush is to be replaced then make
sure that the oil grooves must align with the oil
feed drillings in the hub.
9. Use a suitable mandrel to push the bush until it
is 0.5mm below the end face of the hub.
Special Tool: Mandrel (Qty.: 1)
10. Lubricate and install a new O-ring 1 to the drum.
11. Align the oil feed holes in the hub with the oil feed
slots in the drum. Refer to Figure 583.
Figure 583.
12. Keep the hub square to the drum to avoid
damage to the O- ring 1.
13. Install the socket head capscrews.
14. Gradually tighten the capscrews to the correct
torque value.
15. Align the threaded holes in the piston with the
guide hole in the hub. Refer to Figure 584.
Figure 584.
LG
AA AB
AB AA
G Piston
L Hub
AA Threaded holes in piston
AB Guide holes in hub
16. Locate the piston inside its groove.
17. Locate the larger dowel (dowel2) pins on the
pressure plate into the drilled holes in the piston.
18. Use a suitable press to push the pressure plate
and the plate will push the piston down.
19. Remove the pressure plate and make sure that
there is no evidence of damaged seals in the
form of small slices of seal material.
20. If damage is suspected, remove the piston, install
new seals and then assemble again.
21. Make sure that the pressure plates are aligned
correctly.
22. Replace the oil baffle plate on the locating dowel
1.
23. Install new springs.
24. Remove any debris that may have been pushed
from the bolt holes into the hub.
25. If the drum and the hub are separated then
the outer bearing and the capscrews must be
replaced with a new one.
26. Before you install the outer bearing make sure
that the spring is installed already.

27 - Driveline
27 - 141 9813/6850-2 27 - 141
27. Use a suitable press to install the outer bearing
and apply force only on to the inner race.
28. Note that the piston rings cannot be installed
before the outer bearing.
29. Apply one drop of JCB Threadlocker and Sealer
to one or two threads from the end, on the
lubrication nozzles.
Consumable: JCB Threadlocker and Sealer
(Medium Strength)
30. Install new piston rings with extreme care, as the
rings can break very easily.
31. Note the interlocking end of the piston rings.
Figure 585.
V
N
Q
R
P
L
Z
Z
T
S
U
AD
N Circlip P Blanking disc
Q Inner bearing R O-ring 2
S Sealing ring T Inner piston seal
U Outer bearing V Bronze brush
L Hub Z Jacking bolts (x2)
AD Piston ring interlocking end
Table 246. Torque table
Item Description Torque value
A Lubrication nozzles 15 N·m
B Bolts 28 N·m
K Socket head capscrews 85 N·m
Master Clutch- Clutch Plates and Plate
Carrier
Disassembly
1. Remove the friction plates and counter plates
from the plate carrier.
2. The plates can only be removed from one end of
the carrier. There are six friction plates and five
counter plates.
3. If the thrust washer is not removed at the time of
removal then remove it now.

27 - Driveline
27 - 142 9813/6850-2 27 - 142
Figure 586.
E
H
G
F
C
B
G
D
C
A
B
B
A
Table 247.
Item Description
A Friction plates
B Counter plates
C Plate carrier
D Thrust washer
E Clutch drum and hub as-
sembly
Item Description
F Guide rods
G Threaded hole
H Clutch pack retainers
Assembly
1. Before you assemble the friction and the counter
plates check them for any signs of damage or
wear.

27 - Driveline
27 - 143 9813/6850-2 27 - 143
2. Friction plates should not be less than 3.5 mm
thick or have oil grooves less than 0.1 mm deep.
If the friction plate thickness is less then 3.5 mm
then it needs to be changed for a new one.
3. Replace the plates in a set, not as a single piece.
4. Check the thrust washer for wear.
5. If the thickness is less than 2.9mm or the outside
diameter is less than 90mm then replace the
thrust washer.
6. Before you install new friction plates and a new
thrust washer soak them in transmission oil for at
least one hour.
7. Start the assembly with a friction plate followed
by a counter plate and so on.
8. Note the correct orientation of oil slots in the
friction plates relative to the plate carrier. Refer
to Figure 587.
Figure 587.
A
C
A Friction plate
C Plate carrier
9. The counter plates should be positioned relative
to the two threaded holes. Refer to Figure 588.
Figure 588.
E
G
F
C
B
G
B Counter plates
C Plate carrier
E Clutch drum and hub assembly
F Guide rods
G Threaded hole
10. It is not possible to replace the clutch drum and
hub assembly inside the clutch housing unless
it is first installed to the plates and plate carrier
assembly.
11. Install the thrust washer to the plate carrier.
12. Install two suitable guide rods to the threaded
holes in the plate carrier.
Special Tool: Guide Rods (Qty.: 2)
13. Use suitable lifting equipment to carefully lower
the drum and hub sub-assembly over the plates.
14. Make sure that the guide rods locate through the
corresponding holes in the drum.
15. Make sure that the drive tangs on the counter
plates engage with the cut-outs in the drum.
16. It may be necessary to rotate the drum and plates
slightly to align them.
17. With the drum and hub fully lowered, remove the
guide rods and install two special pack retainers
to temporarily hold the assembly together.
Special Tool: Clutch Pack Retainers (Qty.: 2)
18. Do not use bolts or screws, mistakenly they may
be left in the place which can make the clutch
inoperative.

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27 - Driveline
27 - 144 9813/6850-2 27 - 144
19. The special retainers prevent further assembly
until they are removed.
20. The drum, hub, plates and plate carrier can
now be replaced inside the clutch housing as a
complete assembly.
Refer to: PIL 27-06-13.
21. Remove the special retainers and install plugs to
the holes in the clutch drum.
22. If the clutch plates are replaced, the plate stack
height is changed.
23. If the stack height is too high then the clutch
will be permanently engaged. Do the following
check.
23.1. Assemble the clutch components inside
the housing.
23.2. Do not install the cover.
Figure 589.
J
K
E
L
E Clutch drum and hub assembly
J Cover
K Bolt
L Splitter input shaft
23.3. Make sure that the bolts are tightened and
the splitter input shaft is engaged in the
clutch plate carrier.
23.4. Turn the clutch drum/hub assembly and, at
the same time hold the splitter shaft so it
does not rotate. Some drag is normal.
Master Clutch- Clutch Drum Carrier and
Power Take Off Input gear
Disassembly
1. To remove the stake nut follow the steps below.
1.1. Use a vice and a suitable jig to position the
assembly as shown.
Special Tool: Clutch Jig (Qty.: 1)

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27 - 145 9813/6850-2 27 - 145
Figure 590.
A
C
B
D
E
A Stake nut B Input gear
C Drum plate carrier D Clutch jig
E Hacksaw
1.2. To avoid damage to the input gear threaded
shaft, use a hacksaw to carefully cut-away
the staked portion of the collar on the stake
nut. Refer to Figure 591.
Figure 591.
A E
A Stake nut
E Hacksaw
1.3. Make sure that the gear shaft is not
damaged.
1.4. The staked portion can now be easily bent
clear of the shaft. Refer to Figure 592.

27 - Driveline
27 - 146 9813/6850-2 27 - 146
Figure 592.
A
F
A Stake nut
F Bent on the stake
1.5. Use a special peg socket to loosen the
stake nut. The nut is very tight.
Special Tool: Peg Socket (Qty.: 1)
1.6. Make sure that the gear shaft is not
damaged.
1.7. Support the input gear and then remove the
stake nut.
1.8. Remove the gear and the bearing retainer
plate from the drum carrier.
1.9. Discard the stake nut.
2. Use a suitable press to push off the bearing and
then remove the loose bearing rib.
Figure 593.
C
G
H
J
BK
A
Table 248.
Item Description
A Stake nut
B Input gear
C Drum plate carrier
G Gear and bearing retain-
er plate
Item Description
H Bearing
J Bearing rib
K Attaching screw holes

Jcb tm420 telescopic wheel loader service repair manual sn 2454001 and up

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Jcb tm420 telescopic wheel loader service repair manual sn 2454001 and up