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𝘼𝙣𝙩𝙞𝙦𝙪𝙚 𝙋𝙡𝙖𝙨𝙩𝙞𝙘 𝙏𝙧𝙖𝙙𝙚𝙧𝙨 𝙞𝙨 𝙫𝙚𝙧𝙮 𝙛𝙖𝙢𝙤𝙪𝙨 𝙛𝙤𝙧 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨. 𝙒𝙚 𝙝𝙖𝙫𝙚 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙥𝙡𝙖𝙨𝙩𝙞𝙘 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙪𝙨𝙚𝙙 𝙞𝙣 𝙖𝙪𝙩𝙤𝙢𝙤𝙩𝙞𝙫𝙚 𝙖𝙣𝙙 𝙖𝙪𝙩𝙤 𝙥𝙖𝙧𝙩𝙨 𝙖𝙣𝙙 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙛𝙖𝙢𝙤𝙪𝙨 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙗𝙪𝙮 𝙩𝙝𝙚 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙛𝙧𝙤𝙢 𝙪𝙨.
Over the 10 years, we have gained a strong foothold in the market due to our range's high quality, competitive prices, and time-lined delivery schedules.
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2. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 988K WHEEL LOADER T8E
Configuration: 988K Wheel Loader T8E00001-UP (MACHINE) POWERED BY C18 Engine
Disassembly and Assembly
836K Landfill Compactor, 834K Wheel Dozer and 988K Wheel Loader Power Train
Media Number -KENR6490-06 Publication Date -01/09/2015 Date Updated -05/12/2017
i02719081
Torque Converter (Lockup) - Assemble
SMCS - 3101-016-L7
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
138-7573 Link Bracket 1
138-7575 Link Bracket 2
B 1P-0520 Driver Gp 1
C 188-1456 Metric Eyebolt 1
D 138-7575 Link Bracket 2
E 138-7575 Link Bracket 3
F
1P-0520 Driver Gp 1
8T-5096 Dial Indicator Gp 1
G 1P-1863 Retaining Ring Pliers 1
Note: Cleanliness is an important factor. Before assembly, all parts should be 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.
1. Check the condition of the O-ring seals that are used in the torque converter and torque
converter housing. If any of the seals are damaged, use new parts for replacement.
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3. Illustration 1 g00674989
2. Install five O-ring seals (96) and three plugs (97).
Illustration 2 g00674987
3. Install block (95) and four bolts (94).
Illustration 3 g00674986
4. Install ring (93) and two bearings (92) to idler gear assembly (91).
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4. Illustration 4 g00675821
5. Install idler gear assembly (91).
Illustration 5 g00675822
6. Install idler gear shaft (90).
7. Install bolt (89) and the washer.
Illustration 6 g00674982
8. Install O-ring seal (88) to cover (87).
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5. Illustration 7 g00675823
9. Install three bolts (86) and cover 87.
Illustration 8 g00675717
10. Use the proper equipment in order to handle bearing cup (85).
11. Lower the temperature of bearing cup (85).
12. Install bearing cup (85) into the housing.
Illustration 9 g00675718
13. Use the proper equipment to handle bearing (83).
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6. 14. Heat bearing (83) to a maximum temperature of 135 °C (275 °F).
15. Install bearing (83) onto gear assembly (77).
Illustration 10 g00674959
16. Install plate (82) onto adapter (80).
17. Install retaining ring (81).
Illustration 11 g00674957
18. Install adapter assembly (80) into gear assembly (77).
19. Install retaining ring (79).
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7. Illustration 12 g00675719
20. Use the proper equipment in order to handle bearing (78).
21. Heat bearing (78) to a maximum temperature of 135 °C (275 °F).
22. Install bearing (78) onto gear assembly (77).
Note: Allow the bearing and the gear assembly to reach a uniform temperature.
23. Use a hammer and a suitable punch in order to reset the bearing around the inside race of
the bearing. This will ensure that the bearing is seated correctly.
Illustration 13 g00675721
24. Install gear assembly (77) and entire shim pack (84).
25. If both pump drives were removed, repeat Steps 10 through 24 for the remaining pump
drive.
Illustration 14 g00716568
26. Lower temperature of bearing cup (75). Install bearing cup (75) into adapter (73). Ensure
that the bearing cup (75) is seated.
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8. Illustration 15 g00716572
Note: DO NOT install the seals to the adapters at this time.
27. Use two persons in order to install adapters (73) and (77) on the torque converter housing.
The weight of adapter (73) is 30 kg (65 lb).
28. Install seven bolts (72) and six bolts (78). The torque for bolts (72) and (78) is
240 ± 40 N·m (177 ± 30 lb ft).
29. When possible, rotate either the torque converter or the outer housing in order to ensure that
the bearings are properly seated.
Illustration 16 g00675824
30. Use Tooling (F) in order to check bearing end play. The bearing end play must be
0.15 ± 0.05 mm (.006 ± .002 inch). Remove shims (84) in order to attain the correct bearing
end play.
31. Remove the pump adapters from the torque converter housing.
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9. Illustration 17 g00674954
32. Use Tooling (B) in order to install seal (76) into adapter (73).
33. Lightly lubricate seal (76) with oil.
Illustration 18 g00674953
34. Install two O-ring seals (74) on adapter (73).
35. Lubricate the O-ring seals (74) prior to assembly.
36. Install two O-ring seals and one lip seal on the remaining adapter.
Illustration 19 g00716572
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10. 37. Install the correct amount of shims (84) to the torque converter housing. The correct shim
thickness was determined in the above steps.
38. Use two persons in order to install adapters (73) and (77) on the torque converter housing.
The weight of adapter (73) is 30 kg (65 lb).
39. Install seven bolts (72) and six bolts (78). The torque for bolts (72) and (78) is
240 ± 40 N·m (177 ± 30 lb ft).
40. When possible, rotate either the torque converter or the outer housing in order to ensure that
the bearings are properly seated.
41. Use Tooling (F) in order to recheck the bearing end play. If necessary, repeat the above
procedure.
Illustration 20 g00674791
42. Install seal (71) onto piston (70).
Illustration 21 g00674790
43. Install piston (70).
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11. Illustration 22 g00674788
Illustration 23 g00674750
44. Install two wear plates (68) and two friction discs (69).
Illustration 24 g00674748
45. Install plate (67) and retaining ring (66).
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12. Illustration 25 g00674744
Illustration 26 g00674747
46. Install clutch adapter (65) and hub (63) to turbine (64).
47. Install 24 bolts (62). The torque for bolts (62) is 105 ± 15 N·m (77 ± 11 lb ft).
Illustration 27 g00674727
48. Install bearing (61).
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13. Illustration 28 g00674725
49. Install O-ring seal (59) and two plugs (60).
Illustration 29 g00675696
50. Use the appropriate equipment in order to turn the housing assembly onto the opposite side,
as shown.
51. Install turbine assembly (64) into housing assembly.
Illustration 30 g00675769
52. Install the ring and the plate below bearing (58).
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14. 53. Install bearing (58).
Illustration 31 g00675437
54. Use the proper equipment in order to handle bearing (57).
55. Heat bearing (57) to a maximum temperature of 135 °C (275 °F).
56. Install bearing (57) onto the outer shaft.
Note: Allow the bearing and the shaft to reach a uniform temperature.
57. Use a hammer and a punch in order to reset the bearing around the inside race of the
bearing. This will ensure that the bearing is seated correctly.
58. Use the proper equipment in order to handle seal carrier (56).
Note: Allow the ring and the shaft to reach a uniform temperature.
59. Heat seal carrier (56) to a maximum temperature of 135 °C (275 °F).
60. Install seal carrier (56) onto the outer shaft.
Illustration 32 g00675571
61. Use a hammer and a suitable punch in order to install pin (55).
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15. Illustration 33 g00674523
62. Install seal (52).
63. Install two seals (53).
64. Install retaining ring (54).
Illustration 34 g00674522
65. Install seal (51) to sleeve (50).
Illustration 35 g00674521
66. Install sleeve (50) and eight bolts (49). The torque for bolts (49) is 30 ± 5 N·m (22 ± 4 lb ft).
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16. Illustration 36 g00674520
67. Use the proper equipment to handle race (48).
68. Lower the temperature of race (48).
69. Install race (48) in drive gear (47).
Illustration 37 g00674519
70. Install drive gear (47) onto housing assembly (45).
71. Install 12 bolts (46). The torque for bolts (46) is 105 ± 15 N·m (77 ± 11 lb ft).
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17. Illustration 38 g00674514
72. Install Tooling (E) in order to housing assembly (45).
73. Attach a suitable hoist and lifting slings to housing assembly (45).
74. Use a suitable lifting device in order to install housing assembly (45) to outer shaft
assembly. The weight of housing assembly (45) is 45 kg (100 lb).
Illustration 39 g00674516
75. Install seal (44) onto piston (43).
Illustration 40 g00674512
76. Install piston (43).
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18. Illustration 41 g00674510
77. Install two friction discs (42) and one wear plate.
Illustration 42 g00674508
78. Install plate (41).
79. Install two bolts (22) on the underside of plate (41).
Illustration 43 g00674506
80. Install 12 bolts (38) and impeller (36) to adapter assembly (39). The torque for bolts (38) is
105 ± 15 N·m (77 ± 11 lb ft).
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19. Illustration 44 g00674505
81. Use the proper equipment in order to handle race (37).
82. Lower the temperature of race (37).
83. Install race (37) in impeller (36).
Illustration 45 g00674507
84. Install the ring and the plate below bearing (40).
85. Install bearing (40).
86. Install the plate above bearing (40).
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20. Illustration 46 g00674504
87. Use two persons in order to install the impeller (36) onto the shaft assembly. The weight of
impeller (36) is 29 kg (65 lb).
Illustration 47 g00674503
88. Install retaining ring (35).
Illustration 48 g00674501
89. Install the ring and the plate below bearing (34).
90. Install bearing (34).
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21. Illustration 49 g00674499
91. Install spacer (33).
Illustration 50 g00674498
92. Install race (32) and retaining ring (31).
Note: Inspect the splines on the stator. If the splines were damaged during disassembly,
replace the stator with a new part.
Illustration 51 g00675434
Typical Example
93. Use proper equipment in order to handle stator (24).
94. Heat stator (24) to a maximum temperature of 121 °C (250 °F) for one hour.
95. Install stator (24) onto cam (30).
96. Install retaining ring (29).
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22. Illustration 52 g00675433
97. Install plate (28) and retaining ring (27) onto stator (24). Repeat this procedure for the
opposite side.
Illustration 53 g00673889
98. Install 13 springs (25) and 13 rollers (26).
99. Install springs (25) in the deepest part of the groove. Assemble the springs so that the
maximum number of loops face toward the outside of the cam.
100. Install rollers (26) in the narrowest part of the groove.
Illustration 54 g00673888
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23. 101. Install stator (24) to carrier assembly (23).
Illustration 55 g00673887
102. Carefully rotate carrier assembly into the upright position. The springs and the rollers will
hold the stator in place.
103. Install Tooling (D) to carrier assembly (23).
104. Attach a suitable lifting device and slings to carrier assembly (23).
105. Use a suitable lifting device in order to install carrier assembly (23) to the torque converter
housing. The weight of carrier assembly (23) is 132 kg (290 lb).
Illustration 56 g00673885
106. Install 36 bolts (21). The torque for bolts (21) is 60 ± 7 N·m (45 ± 5 lb ft).
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24. Illustration 57 g00675572
107. Use the proper equipment in order to handle seal carrier (20).
108. Heat seal carrier (20) to a maximum temperature of 135 °C (275 °F).
109. Install seal carrier (20) onto inner shaft (18).
110. Use the proper equipment in order to handle bearing (19).
111. Heat bearing (19) to a maximum temperature of 135 °C (275 °F).
112. Install bearing (19) onto inner shaft (18).
Note: Allow the bearing and the shaft to reach a uniform temperature.
113. Use a hammer and a suitable punch in order to reset the bearing around the inside race of
the bearing. This will ensure that the bearing is seated correctly.
Illustration 58 g00673883
114. Install Tooling (C) to shaft assembly (18).
115. Attach a suitable lifting device and a suitable lifting sling to Tooling (C).
116. Use the suitable lifting device in order to install shaft assembly (18). The weight of shaft
assembly (18) is 17 kg (38 lb).
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25. Illustration 59 g00673879
117. Carefully position the torque converter onto the side, as shown.
Illustration 60 g00673881
118. Install washer (17), retainer (16), and two bolts (15). The torque for bolts (15) is
105 ± 15 N·m (77 ± 11 lb ft).
Illustration 61 g00673880
119. Install cover (14) and six bolts (13). The torque for bolts (13) is 60 ± 7 N·m (44 ± 5 lb ft).
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26. Illustration 62 g00660849
120. Position the torque converter upright.
121. Install gasket (10).
122. Install O-ring seals (11) and (12).
Illustration 63 g00660847
123. Use Tooling (B) in order to install seal (9) into retainer (8).
Illustration 64 g00660846
124. Install retainer (8) and eight bolts (7). The torque for bolts (7) is 60 ± 7 N·m (45 ± 5 lb ft).
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27. Note: It is necessary to install the torque converter into the torque converter housing prior to
installation of the idler gear.
Illustration 65 g00665414
125. Install Tooling (A) to the torque converter housing.
126. Attach a suitable lifting device and lifting chains to Tooling (A), as shown.
127. Use the suitable lifting device in order to install the torque converter housing to the torque
converter. The weight of the torque converter housing is 270 kg (600 lb).
Illustration 66 g00665412
128. Install eleven bolts (6) and the washers.
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28. Illustration 67 g00665121
129. Install yoke (5).
130. Install O-ring seal (4).
Illustration 68 g00665406
131. Install bolt (2) and retainer (3). The torque for bolt (2) is 240 ± 25 N·m (175 ± 20 lb ft).
Illustration 69 g00660841
132. Install speed sensor (1).
End By:
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29. a. Install the transmission oil pump. Refer to Disassembly and Assembly, "Transmission Oil
Pump - Install" for the machine that is being serviced.
b. Install the torque converter outlet relief valve. Refer to Disassembly and Assembly, "Relief
Valve (Torque Converter Outlet) - Install" for the machine that is being serviced.
c. Install the modulating valve for the torque converter impeller clutch. Refer to Disassembly
and Assembly, "Modulating Valve (Torque Converter Impeller Clutch) - Install" for the
machine that is being serviced.
d. Install the modulating valve for the torque converter lockup clutch. Refer to Disassembly
and Assembly, "Modulating Valve (Torque Converter Lockup Clutch) - Install" for the
machine that is being serviced.
e. Install the torque converter. Refer to Disassembly and Assembly, "Torque Converter -
Install" for the machine that is being serviced.
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sun Feb 7 02:12:30 UTC+0800 2021
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31. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 988K WHEEL LOADER T8E
Configuration: 988K Wheel Loader T8E00001-UP (MACHINE) POWERED BY C18 Engine
Disassembly and Assembly
836K Landfill Compactor, 834K Wheel Dozer and 988K Wheel Loader Power Train
Media Number -KENR6490-06 Publication Date -01/09/2015 Date Updated -05/12/2017
i05590451
Modulating Valve (Torque Converter Lockup Clutch) -
Remove and Install
SMCS - 3139-010-VC
Removal Procedure
Start By:
a. Connect the steering frame lock.
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting, and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat products.
Dispose of all fluids according to local regulations and mandates.
Personal injury can result from hot oil spray.
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32. Make sure all attachments have been lowered, oil is cool and the
pressure has been released from the hydraulic system before removing
any components or lines.
Be sure there is no pressure in the tubing before it is disconnected from
the fitting.
Do not allow hot oil or components to contact skin.
Note: The modulating valve for the torque converter lockup clutch is mounted on the torque
converter below the steering pump.
Illustration 1 g03548757
1. Disconnect harness assembly (2). Remove two bolts (3) and modulating valve (1).
Illustration 2 g00681068
2. Remove seal (4) from modulating valve (1).
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33. Illustration 3 g01141308
3. Remove nut (5) and coil assembly (6).
Illustration 4 g01141309
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
4. Remove cartridge assembly (7) from valve body (8).
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