Caterpillar Cat 980H Wheel Loader (Prefix MHG) Service Repair Manual (MHG00001 and up)

1
Service Repair Manual
Models 980H WHEEL LOADER
2
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Product WHEEL LOADER Model 980H WHEEL LOADER
MHG Configuration 980H Wheel Loader MHG00001-UP
(MACHINE) POWERED BY C-15 Engine
Disassembly and Assembly 980H Wheel Loader Power
Train Media Number -RENR8667-08 Publication Date
-01/09/2018
Date Updated -04/09/2018
i05903287
Torque Converter (Freewheel Stator) -
Disassemble SMCS - 3101-015 Disassembly
Procedure Table 1 Required Tools
Tool Part Number Part Description Qty
A 138-7573 Link Bracket 3
8B-7548 Push-Puller 1
8B-7550 Leg 2
B 8H-0684 Ratchet Wrench 1
8B-7560 Step Plate 1
8H-0663 Bearing Puller Attachment 1
8B-7548 Push-Puller 1
8H-0684 Ratchet Wrench 1
C 8B-7549 Leg 2
5P-4808 Cap 2
8B-7554 Bearing Cup Puller Attachment 1
5F-7343 5F-7343 Bearing Puller Attachment 1
1P-0520 1P-0520 Driver Group 1
D
E 1P-0510 Driver Group 1
F 7
3
Forcing Screw 3/8 - 16 x 3 in
Start By A. Separate the torque converter from
the transmission and from the output transfer
gears. Refer to Disassembly and Assembly, "Torque
Converter from Transmission, Output Transfer
Gears - Separate" for the machine that is being
serviced. 1. Place the torque converter housing
assembly (2) on wood blocks.
Illustration 1 g00503225 2. Remove bolts (1) and
the washers from torque converter housing
assembly (2) .

• Illustration 2 g01111329
• Install Tooling (A) to torque converter housing
  assembly (2) , as shown. Attach a suitable
  lifting device to Tooling (A) . The weight of
  housing assembly (2) is approximately 120 kg (265
  lb).
• Use Tooling (F) to loosen housing assembly (2)
  from the torque converter.

4
5. Remove housing assembly (2) from the torque
converter.
Illustration 3 g00871317 6. Remove O-ring seal
(3) from torque converter housing assembly (2) .
Illustration 4 g00871318 7. Remove bolts (4) and
the washers from pump adapter (5) and torque
converter housing assembly (2) .
5
Illustration 5 g00871264 8. Use Tooling (F) to
remove pump adapter (5) from torque converter
housing assembly (2) .
Illustration 6 g00871319 9. Use tooling (C) to
remove bearing cup (6) , O-ring seal (8) , and
shims (7) from pump adapter (5) . See
illustration 13 for Tooling (C) .
Illustration 7
g00871326
6
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10. Remove pump drive gear (9) from torque
converter housing assembly (2) .
Illustration 8 g00871451 11. Use Tooling (B) to
remove bearing cones (10) from each side to pump
drive gear (9) .
Illustration 9 g00871333 12. Use Tooling (C) to
remove bearing cup (11) from torque converter
housing assembly (2) . See illustration 13 for
Tooling (C) .
8

• Illustration 10 g01112900
• Remove bolt (12) and the washer from torque
  converter housing assembly (2) .
• Use Tooling (F) to push shaft assembly (14) out
  of torque converter housing assembly (2) .
• Remove idler gear (13) from torque converter
  housing assembly (2) .

Illustration 11 g01112903 16. Remove O-ring seal
(15) from shaft assembly (14) .
9
Illustration 12 g00871365 17. Remove bearing
cone (16) , bearing cone spacer (17) , and
bearing cone (18) from idler gear (13) .
Illustration 13 g00871366 18. Use Tooling (C) to
remove bearing cup (19) from idler gear (13) .
Illustration 14 g00871367 19. Remove bearing cup
spacer (20) from idler gear (13) .
10
Illustration 15 g00871368 20. Remove retaining
ring (21) from idler gear (13) .
Illustration 16 g00871369 21. Use Tooling (C) to
remove bearing cups (22) from idler gear (13) .
11
Illustration 17 g00871370 22. Remove studs (23)
from torque converter housing assembly (2) .
Illustration 18 g00871267 23. Remove retaining
ring (24) and bearing carrier (25) from the
carrier assembly.
Illustration 19
g01112906
24. Remove bearing carrier (25) .
12

• Illustration 20 g00871269
• Remove O-ring seal (26) from bearing carrier (25)
  .
• Remove seal ring (27) from ring carrier (28) .

Illustration 21 g00871273 27. Use Tooling (D)
and a press to remove ring carrier (28) from
bearing carrier (25) .
13
Illustration 22 g00871274 28. Remove retaining
ring (29) from bearing carrier (25) .
Illustration 23 g00871275 29. Use Tooling (D)
and a press to remove inner bearing (30) from
bearing carrier (25) .

• Illustration 24 g01112907
• Remove bolts (31) and the washers from drive gear
  (32) .
• Remove drive gear (32) .

14
Illustration 25 g01112910 32. Use Tooling (E)
and a press to remove the outer bearing race
(32A) (not shown) from drive gear (32) .
Illustration 26 g00871278 33. Remove retaining
ring (33) from drive gear (32) .
Illustration 27
g00871279
15
34. Remove bolts (34) and the washers from drive
flange (35) and rotating housing (36) .
Illustration 28 g00871281 35. Use bolts (34) as
forcing screws to remove drive flange (35) from
rotating housing (36) . The weight of drive
flange (35) is 23 kg (51 lb).
Illustration 29 g00871282 36. Remove bolts (37)
from drive flange (35) .
16
Illustration 30 g00871283 37. Remove drive
flange (35) from impeller (38) .

• Illustration 31 g00871284
• Position impeller hub (39) on wood blocks.
• Remove impeller (38) from impeller hub (39) .

Illustration 32
g00870210
17
40. Remove thrust bearing (40) and race (40A)
(not shown) from carrier assembly (41) .
Illustration 33 g00870211 41. Remove carrier
assembly (41) and stator (42) as a unit from
rotating housing (36) .
Illustration 34 g00870212 42. Remove snap ring
(43) from stator (42) . Remove plate (44) from
stator (42) .
18
Illustration 35 g01112913 43. Remove 11
freewheel rollers (45) and 11 freewheel springs
(46) from freewheel cam (47) . Remove stator (42)
from carrier assembly (41) .

• Illustration 36 g01112915
• Remove retaining ring (48) . Remove plate (49) .
• Use Tooling (E) and a hydraulic press in order to
  remove freewheel cam (47) from stator
• (42) .
• Note If necessary, heat the stator to a maximum
  temperature of 135 C (275 F) for approximately
  15 minutes.

Illustration 37 g01112917 46. Remove thrust
bearing (50) from carrier assembly (41) . Remove
sleeve bearing (51) from carrier assembly (41) .
19
Illustration 38 g01112919 47. Remove thrust
bearing race (52) and the thrust bearing.
Illustration 39 g00870286 48. Remove turbine
(53) and turbine hub (54) as a unit from rotating
housing (36) .
Illustration 40 g01112920 49. Remove bolts (55)
and the washers that hold turbine (53) to hub
(54) .
20
Illustration 41
g00870755
50. Remove hub (54) from turbine (53) .
Illustration 42 g00870288 51. Remove retaining
ring (56) from turbine hub (54) .
21
Illustration 43 g01112924 52. Remove two races
(57) and thrust bearing (58) .

• Illustration 44 g00870291
• Remove bolts (59) and the washers from cover
  assembly (60) .
• Remove cover assembly (60) from rotating housing
  (36) .
• Remove ring seal (61) from rotating housing (36) .

Illustration 45 g00870294 56. Remove sleeve
bearing (62) from cover assembly (60) .
Copyright 1993 - 2021 Caterpillar Inc. All Rights
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22
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Previous Screen
Product WHEEL LOADER Model 980H WHEEL LOADER
MHG Configuration 980H Wheel Loader MHG00001-UP
(MACHINE) POWERED BY C-15 Engine
Disassembly and Assembly 980H Wheel Loader Power
Train Media Number -RENR8667-08 Publication Date
-01/09/2018
Date Updated -04/09/2018
i05903427
Torque Converter (Freewheel Stator) -
Assemble SMCS - 3101-016 Assembly Procedure Table
1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 138-7573 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 Pin (3/8 - 16 by 8 in) 2
K - Guide Pin (1/2 - 13 by 3 in) 3
L 2P-8312 Retaining Ring Pliers 1
Note Cleanliness is an important factor. Before
assembly, thoroughly cleaned in cleaning fluid.
Allow the parts to air dry. Wiping cloths or rags
should not be used to dry parts. Lint may be
deposited on the parts which may cause later
trouble. Inspect all parts. If any parts are worn
or damaged, use new parts for replacement. Note
Apply oil to all of the bearings before assembly.
23
Illustration 1 g01112937 1. Use Tooling (H) to
install sleeve bearing (62) in cover assembly
(60) . Sleeve bearing (62) must be even with the
outside surface of cover assembly (60) .

• Illustration 2 g03337064
• Install ring seal (61) to rotating housing (36) .
• Install cover assembly (60) to rotating housing
  (36) .
• Install bolts (59) and the washers to cover
  assembly (60) . Tighten the bolts to a torque of
  30
• 5 Nm (22 4 lb ft).

24
Illustration 3 g00870744 5. Install races (57)
and thrust bearing (58) to cover assembly (60) .
Illustration 4 g00870748 6. Install retaining
ring (56) in turbine hub (54) .
Illustration 5
g00870755
7. Install turbine (53) on hub (54) .
25
Illustration 6 g00870757 8. Install bolts (55)
and the washers to turbine (53) . Tighten the
bolts to a torque of 50 7 Nm (37 5 lb ft).
Illustration 7 g00870759 9. Install hub (54) and
turbine (53) as a unit to rotating housing (36) .
26
Illustration 8 g00870760 10. Install thrust
bearing race (52) and the bearing to the turbine
hub (54) .
Illustration 9 g01112941 11. Use Tooling (H) and
a hydraulic press in order to install sleeve
bearing (51) to carrier assembly (41) . Install
thrust bearing (50) to carrier assembly (41) .
Illustration 10
g01112915
27

• Illustration 11 g01112913
• Use Tooling (H) and a hydraulic press in order to
  install freewheel cam (47) to stator (42) .
• Install plate (49) to stator (42) . Install
  retaining ring (48) to stator (42) .
• Note If necessary, heat stator (42) to a maximum
  temperature of 135 C (275 F). Install the cam
  with the IMPELLER SIDE facing downward. Continue
  with the installation until freewheel cam (47)
  contacts the retaining ring (not shown).
• Install stator (42) to carrier assembly (41) .
  Install freewheel springs (46) and freewheel
  rollers (45) to freewheel cam (47) . Always
  install new freewheel springs (46) and freewheel
  rollers (45) . Install freewheel springs (46)
  with the maximum number of loops in freewheel
  springs (46) to the outside of freewheel cam (47)
  . Use the orientation of stator
• (42) in Illustration 11 in reference to the
  following statement Stator (42) should turn
  freely
• in the clockwise direction. Stator (42) should
  not turn freely in the counterclockwise direction.

Illustration 12 g00870421 15. Install plate (44)
to stator (42) . Install snap ring (43) to stator
(42) .
28
Illustration 13 g00870422 16. Install carrier
assembly (41) and stator (42) as a unit to
rotating housing (36) .
Illustration 14 g00870762 17. Install thrust
bearing (40) and race (40A) (not shown) to the
carrier assembly (41) .
Illustration 15 g00870994 18. Position impeller
hub (39) on a wood block.
29
19. Install impeller (38) on impeller hub (39) .
Illustration 16
g00870995
20. Install drive flange (35) on impeller (38) .
Illustration 17 g00871000 21. Install bolts (37)
on drive flange (35) . Tighten the bolts to a
torque of 80 10 Nm (60 7 lb ft).
30

• Illustration 18 g00871001
• Install drive flange (35) on rotating housing
  (36) . The weight of drive flange (35) is
  approximately 23 kg (51 lb).
• Install bolts (34) and the washers to drive
  flange (35) . Tighten the bolts to a torque of 30
  5 Nm (22 4 lb ft).

Illustration 19 g00871003 24. Install retaining
ring (33) in the groove of drive gear (32) .
31

• Illustration 20 g00870829
• Use the proper equipment to handle outer bearing
  race (32A) . Lower the temperature of outer
  bearing race (32A) .
• Install outer bearing race (32A) in drive gear
  (32) . Make sure that outer bearing race (32A)
  contact retaining ring (33) .

• Illustration 21 g00870763
• Install drive gear (32) on drive flange (35) .
• Install bolts (31) and the washers on drive gear
  (32) . Tighten the bolts to a torque of 50 7
  Nm (37 5 lb ft).

Illustration 22 g00871006 29. Use the proper
equipment to handle inner bearing (30) . Heat
inner bearing (30) to a maximum temperature of
135 C (275 F). Install inner bearing (30) on
bearing carrier (25) .
32
Illustration 23 g00871007 30. Install retaining
ring (29) in the groove of bearing carrier (25) .
Illustration 24 g00871009 31. Use the proper
equipment to handle ring carrier (28) . Heat ring
carrier (28) to a maximum temperature of 135 C
(275 F). Install ring carrier (28) on bearing
carrier (25) .
Illustration 25
g00871012
33
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34

1. Install seal ring (27) on ring carrier (28) .
2. Install O-ring seal (26) on bearing carrier (25) .

Illustration 26 g00871014 34. Install bearing
carrier (25) in drive flange (35) .
Illustration 27 g00871015 35. Install retaining
ring (24) and bearing carrier (25) on carrier
assembly (28) .
35
Illustration 28 g00872709 36. Install studs (23)
in torque converter housing assembly (2) .
Tighten the studs to a torque of 100 15 Nm (74
11 lb ft).
Illustration 29 g00872711 37. Install retaining
ring (21) in the groove of idler gear (13) .
Illustration 30
g00872713
36
38. 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 31 g00872715 39. 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) .
Illustration 32 g00872716 40. Use the proper
equipment to handle bearing cup (19) . Lower the
temperature of bearing cup (19) . Install bearing
cup (19) in idler gear (13) .
37
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manual if required, please enter the following
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