Caterpillar Cat 980M Wheel Loader (Prefix N8T) Service Repair Manual (N8T00001 and up)

1
Service Repair Manual
Models 980M Wheel Loader
2
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Product WHEEL LOADER Model 980M WHEEL LOADER
N8T Configuration 980M Wheel Loader N8T00001-UP
(MACHINE) POWERED BY C13 Engine
Disassembly and Assembly 980M and 982M Wheel
Loaders Power Train Media Number
-UENR3097-03 Publication Date -01/09/2018
Date Updated -13/09/2018
i06838485
Torque Converter - Assemble - Lock Up Clutch with
Freewheel Stator SMCS - 3101-016 Assembly
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 439-3938 Link Bracket 3
G 8T-5096 Dial Indicator Test Group 1
G 5P-2390 Gauge Tool Group 1
H 1P-0520 Driver Group 1
J - Guide Stud (3/8 - 16 by 8 in) 2
K - Guide Stud (1/2 - 13 by 3 in) 3
L 2P-8312 Retaining Ring Pliers 1
3
Illustration 1
g02752296
1. Install seals (64).
Illustration 2 g02735387 2. Install adapter
(63), hub (62), and bolts (61) onto impeller
(54). Tighten bolts (61) to a torque of 105 14
Nm (77 10 lb ft).
Illustration 3
g02735380
3. Install bearing (60).
4
Illustration 4 g02735374 4. Install carrier
assembly (58) and retaining ring (59) onto
impeller (54).

• Illustration 5 g02744677
• Raise the temperature of bearing (57). Install
  bearing (57) onto hub (55).
• Install seal ring (56).

Illustration 6
g02734776
5
Illustration 7 g02735333 7. Install hub (55) and
retaining ring (56) onto impeller (54).

• Illustration 8 g02732255
• Attach Tooling (A) and a suitable lifting device
  to impeller (54). The weight of impeller
• (54) is approximately 27 kg (60 lb).
• Position impeller (54) onto shaft assembly (39).

Illustration 9 g02731806 10. Install retaining
ring (53) (not shown) and plate (52) onto stator
(46).
6
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• Install freewheel cam (51), freewheel rollers
  (50), and springs (49).
• Note Springs (49) must be installed with the
  maximum number or loops to the outside.
• Install plate (48) and retaining ring (47).

Illustration 10
g02731802
Illustration 11
g02731732

1. Install stator assembly (46).
2. Install bearing (45) and race (44).

8
Illustration 12
g02744699
Illustration 13
g02731651

1. Install hub (43) and turbine (42).
2. Use two of bolts (36) to align the holes.
3. Use suitable blocking to support the bottom of
   shaft assembly (39). Install plate (41) and
   retaining ring (40).

Illustration 14 g02731644 18. Install plate
(38), coupling assembly (37), and bolts (36).
Tighten bolts (36) to a torque of 60 7 Nm (44
5 lb ft).
9
Illustration 15 g02731623 19. Install plate
(32), disk (33), races (34), and bearing (35).
Illustration 16 g02731059 20. Lower the
temperature of bushing (31). Install bushing (31)
into housing (27).
10
Illustration 17 g02730689 21. Install seals (29)
onto piston (28). Install plate (30), piston
(28), and housing (27).
Illustration 18 g02730012 22. Install bolts
(26). Tighten bolts (26) to a torque of 60 7
Nm (44 5 lb ft).
Illustration 19
g02735357
11
23. Lower the temperature of race (25A). If
necessary, use the driver group from Tooling (D)
and a suitable press to install race (25A) into
gear (25).

• Illustration 20 g02729366
• Use a suitable lifting device to reposition the
  torque converter, as shown. The weight of the
  torque converter is approximately 122 kg (269
  lb).
• Install drive gear (25) and bolts (24). Tighten
  the bolts to a torque of 50 7 Nm (37 5 lb
  ft).

Illustration 21 g00872709 26. Install studs (23)
in torque converter housing assembly (2). Tighten
the studs to a torque of 100 15 Nm (74 11 lb
ft).
12
Illustration 22 g00872711 27. Install retaining
ring (21) in the groove of idler gear (13).
Illustration 23 g00872713 28. Use the proper
equipment to handle bearing cup (22). Lower the
temperature of bearing cup (22). Install bearing
cup (22) in idler gear (13).
Illustration 24 g00872715 29. Flip idler gear
(13) to the opposite side. Install bearing cup
spacer (20) in idler gear (13). The notch in
bearing cup spacer (20) must be aligned with
retaining ring (21).
13
Illustration 25 g00872716 30. Use the proper
equipment to handle bearing cup (19). Lower the
temperature of bearing cup (19). Install bearing
cup (19) in idler gear (13).
Illustration 26 g00872718 31. Install bearing
cone (16), bearing cone spacer (17), and bearing
cone (18) in idler gear (13).
Illustration 27 g01112903 32. Apply clean
hydraulic oil on O-ring seal (15). Install O-ring
seal (15) on shaft assembly (14).
14

• Illustration 28 g01112954
• Install Tooling (K) in shaft assembly (14).
• Hold idler gear (13) in position in torque
  converter housing assembly (2). Install shaft
  assembly (14).
• Remove Tooling (K) from shaft assembly (14).

Illustration 29 g01112970 36. Install bolt (12)
that holds shaft assembly (14) in place in torque
converter housing assembly (2). Tighten bolt (12)
to a torque of 120 20 Nm (90 15 lb ft).
Illustration 30 g00872724 37. Use the proper
equipment to handle bearing cones (10). Heat
bearing cones to a maximum temperature of 135 C
(275 F). Install bearing cone (10) on each side
of pump drive gear (9).
15
Illustration 31 g00872801 38. Use the proper
equipment to handle bearing cup (11). Lower the
temperature of bearing cup (11). Install bearing
cup (11) in torque converter housing assembly (2).
Illustration 32 g00872727 39. Install pump drive
gear (9) in torque converter housing assembly (2).
Illustration 33 g00872729 40. Use the proper
equipment to handle bearing cup (6). Lower the
temperature of bearing cup (6).
16

• Illustration 34 g00871319
• Apply clean hydraulic oil on O-ring seal (8).
• Install bearing cup (6), O-ring seal (8), and
  shims (7) on pump adapter (5).

• Illustration 35 g01112978
• Install Tooling (J) in torque converter housing
  assembly (2).
• Install pump adapter (5) on torque converter
  housing assembly (2).

Illustration 36
g01112982
17

• Install bolts (4) and the washers on pump adapter
  (5) and torque converter housing assembly (2).
• Use Tooling (G) to check bearing end play. The
  bearing end play must be 0.15 0.05 mm (0.006
  0.002 inch). Add or remove shims to get the
  correct bearing end play.
• Note If end play is less than 0.10 mm (0.004
  inch) add extra shims. If end play is greater
  than 0.20 mm (0.008 inch) remove shims.

Illustration 37 g00872732 47. Apply clean
hydraulic oil on O-ring seal (3). Install O-ring
seal (3) on torque converter housing assembly (2).
Illustration 38
g02730506
48. Install relief valve assembly (2A).
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Illustration 39
g02752336

• Illustration 40 g02752337
• Install Tooling (J) in the carrier assembly.
• Use Tooling (A) and a suitable lifting devise to
  position torque converter housing assembly
• (2) to position torque converter housing assembly
  (2) on the torque converter, as shown. The weight
  of torque converter housing assembly (2) is
  approximately 144 kg (317 lb). Install two bolts
  (1).

Illustration 41
g00503225
19
51. Install remaining bolts (1) for torque
converter housing assembly (2). Tighten bolts (1)
to a torque of 120 20 Nm (90 15 lb ft). End
By a. Connect the torque converter to the
transmission and to the output transfer gears.
Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Sun Mar 14 221316 UTC0800 2021
20
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Product WHEEL LOADER Model 980M WHEEL LOADER
N8T Configuration 980M Wheel Loader N8T00001-UP
(MACHINE) POWERED BY C13 Engine
Disassembly and Assembly 980M and 982M Wheel
Loaders Power Train Media Number
-UENR3097-03 Publication Date -01/09/2018
Date Updated -13/09/2018
i06838249
Transmission from Output Transfer Gears -
Separate SMCS - 3002-076 Separation
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1U-9200 Lever Puller Hoist 1
B 439-3940 Link Bracket 1
C 395-1094 Link Bracket 3
D 1P-2420 Transmission Repair Stand 1
Start By a. Separate the torque converter from
the transmission.
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Illustration 1
g01105945
Note Typical example

• Illustration 2 g03662427
• Use Tooling (A), Tooling (B), and a suitable
  lifting device to reposition the transmission and
  output transfer gears (1) onto suitable cribbing.
  The weight of the transmission and output
  transfer gears (1) is approximately 1406 kg (3100
  lb).
• Disconnect harness assembly (2). Disconnect tube
  assembly (3).

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Illustration 3
g03728546
Illustration 4
g06136933

• Illustration 5 g06136941
• Attach Tooling (C) and a suitable lifting device
  to housing (4). The weight of housing (4) is
  approximately 108 kg (240 lb). Remove all bolts
  (5).
• Remove three bolts (7).
• Remove bolts (6) and solenoid (9). Remove sleeve
  (8). Remove and inspect O-rings (10) and (11).
  Repeat for remaining solenoids and sleeves.

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6. Remove housing (4).
Illustration 6 g06136944 7. Remove bolts (14)
from manifold (13). Attach Tooling (C) and a
suitable lifting device to transmission (12). The
weight of transmission (12) is approximately 450
kg (992 lb).
Illustration 7
g06136950
8. Place transmission (12) on Tooling (D).
Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Sun Mar 14 221413 UTC0800 2021
24
Shutdown SIS
Previous Screen
Product WHEEL LOADER Model 980M WHEEL LOADER
N8T Configuration 980M Wheel Loader N8T00001-UP
(MACHINE) POWERED BY C13 Engine
Disassembly and Assembly 980M and 982M Wheel
Loaders Power Train Media Number
-UENR3097-03 Publication Date -01/09/2018
Date Updated -13/09/2018
i06839284
Output Transfer Gears - Disassemble SMCS -
3075-015-OJ Disassembly Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1P-0520 Driver Group 1
B 8B-7548 Push-puller 1
B 8B-7551 Bearing Puller Assembly 1
B 9S-9154 Step Plate 1
C 439-3940 Link Bracket 2
D 6L-7283 Bolt 2
Start By a. Remove the transmission from the
output transfer gears.
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Illustration 1
g01108584
1. Remove speed sensors (1).
Illustration 2
g01108586
2. Remove hose assembly (2).
Illustration 3 g01108605 3. Remove bolt (3) and
retainer (4) from the input side of the output
transfer gear case.
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Illustration 4
g01108617
4. Remove O-ring seal (5).
Illustration 5
g01108628
5. Remove yoke (6).
Illustration 6 g01108630 6. Remove bolts (7) and
the washers from bearing cage (8).
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Illustration 7 g01108631 7. Use Tooling (D) to
remove bearing cage (8). Remove bearing cage (8).
Illustration 8 g01108635 8. Use Tooling (A) (not
shown) to remove lip seal (9) and outer bearing
race (10) from bearing cage (8). Remove lip seal
(9) and outer bearing race (10).
Illustration 9 g01108639 9. Remove O-ring seal
(11) from bearing cage (8).
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Illustration 10 g01108665 10. Remove spacer (12)
from transfer shaft (13).

• Illustration 11 g01108680
• Position the transfer case with the output side
  upward, as shown. The weight of the output
  transfer gear group is 545 kg (1202 lb).
• Mark bolts (14) for installation purposes. Remove
  bolts (14) and the washers from bearing cage
  (15).
• Use Tooling (D) to loosen bearing cage (15) from
  the transfer case. Remove bearing cage (15).

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Illustration 12 g01108700 14. Place bearing cage
(15) in a suitable press, as shown. Press
transfer shaft (13) out of bearing cage (15). The
weight of transfer shaft (13) is approximately 27
kg (60 lb). Note Place a suitable block (not
shown) under transfer shaft (13) to prevent
transfer shaft (13) from falling to the ground.
Illustration 13 g01108710 15. Use two people to
remove bearing cage (15) from output gear (16).
The weight of bearing cage (15) is approximately
33 kg (73 lb). Remove bearing cage (15).
Illustration 14 g01108772 16. Remove spacer (17)
from output gear (16).
30
Illustration 15 g01108776 17. Use Tooling (B) to
remove bearing (18) from transfer shaft (13).
Remove bearing (18).
Illustration 16 g01108777 18. Remove O-ring seal
(21), bolts (19), the washers, and retainer (20)
from bearing cage (15).
Illustration 17
g01108778
31
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32

• Illustration 18 g01108779
• Use Tooling (A) and a suitable press to remove
  two bearing cones (22) and two bearing cups (23)
  from bearing cage (15). Remove two bearing cones
  (22) and two bearing cups (23).
• Remove lip seal (24) from bearing cage (15).

• Illustration 19 g01771754
• Mark bolts (25) for installation purposes. Remove
  nine bolts (25) and the washers.
• Remove cover assembly (26) and O-ring seal (27).

33
Illustration 20
g01771954
23. Remove shaft (26A).
Illustration 21 g01771836 24. Remove bolt (26E).
Remove the speed sensor and O-ring seal (26D).
Remove bolts (26B). Remove cage assembly (26C).
34
Illustration 22 g06137100 25. Remove bolts
(26F). Remove cage (26G).
Illustration 23 g01778734 26. Remove retaining
ring (26K). Remove bearing (26H). Remove rotor
(26J).
Illustration 24
g01108784
35
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Friend! Thank you very much for visiting. Full
manual if required, please enter the following
URL into your browser. https//www.aservicemanual
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