Caterpillar Cat 637K Wheel Tractor Scraper (Prefix WTX) Service Repair Manual Instant Download.pdf

Product: WHEEL TRACTOR
Model: 637K WHEEL TRACTOR WTX
Configuration: 637K Wheel Tractor Scraper WTX00001-UP (MACHINE)
Disassembly and Assembly
631K and 637K Wheel Tractor Scraper Power Train
Media Number -M0067918-02 Publication Date -01/03/2018 Date Updated -03/04/2018
i02176953
Torque Converter - Disassemble
SMCS - 3101-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 2P-8312 Retaining Ring Pliers 1
B 1P-0510 Driver Group 1
C -
Forcing Bolts
3/8 - 16 NC by 4 inch
2
Start By:
a. Remove the torque converter. Refer to Disassembly and Assembly, "Torque Converter -
Remove".
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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisw...

Illustration 1 g01102574
1. Use Tooling (A) in order to remove retaining ring (1) from carriage support assembly (2).
Remove carriage support assembly (2) from hub (3). Use Tooling (B) and a suitable
hydraulic press in order to remove the sleeve bearing from carriage support assembly (2).
2. Remove bolts (4) from impeller (5). Remove bolts (6) and clamp plate (7) from impeller
hub (8).
3. Install Tooling (C) into impeller (5). Use Tooling (C) in order to remove impeller (5) and
impeller hub (8) from housing (9).
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4. Remove thrust race (10) from impeller (5). Remove impeller hub (8) from impeller (5).
5. Remove thrust bearing (11) and seal ring (12A) from carrier assembly (12).
6. Remove carrier assembly (12) and stator (13) as a unit from housing (9).
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7. Position carrier assembly (12) and stator (13), as shown. Use Tooling (A) in order to
remove retaining ring (14) from stator (13). Remove thrust race (15) from stator (13).
8. Remove freewheel rollers (17) and freewheel springs (16) from freewheel cam (18).
Remove stator (13) from carrier assembly (12).
9. Use Tooling (A) in order to remove retaining ring (19) from stator (13). Remove side plate
(20) from stator (13).
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10. Use Tooling (B) and a suitable press in order to remove freewheel cam (18) from stator
(13).
11. Remove thrust bearing (21) from carrier assembly (12). Remove sleeve bearing (22) from
carrier assembly (12).
12. Remove turbine (23) and hub (3) as a unit from housing (9).
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13. Remove thrust bearing (24) and thrust race (25) from hub (3).
14. Position turbine (23), as shown. Remove thrust race (26) from hub (3). Put an alignment
mark on turbine (23) and hub (3) for installation purposes. Remove bolts (27) from turbine
(23).
15. Remove clamp ring (28) and turbine (23) from hub (3).
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16. Remove thrust bearing (29) and thrust race (30) from housing (9).
17. Remove bolts (31) and flange (32) from housing (9).
18. Remove sleeve bearing (33) from flange (32).
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i04351575
Torque Converter - Disassemble - Scraper
SMCS - 3101-015
Disassembly Procedure
Table 1
Required Tools
A 138-7575 Link Brackets 3
B 1P-2420 Transmission Repair Stand 1
C 1P-0520 Driver Gp 1
D 8H-0663 Bearing Puller Gp 1
E
1P-2322 Combination Puller 1
1P-0546 Puller Jaw 1
1P-0510 Driver Gp 1
F 1P-0074 Slide Hammer Puller Gp 1
Start By:
a. Separate Torque Converter, Transmission, and Transfer Gear.
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1. Attach Tooling (A) and a suitable lifting device to housing assembly (2) . Reposition
housing assembly (2) onto Tooling (B). The weight of housing assembly (2) is
approximately 73 kg (160 lb).
2. Remove bolts (1) and lift housing assembly (2) from torque converter assembly (3).
3. Reposition torque converter assembly (3) on Tooling (B) as shown. The weight of torque
converter assembly (3) is approximately 34 kg (76 lb).
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4. Remove bolts (4).
5. Attach Tooling (A) and a suitable lifting device to cover assembly (5). Remove cover
assembly (5) from torque converter assembly (3).
6. Remove clutch piston (6).
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7. Remove friction disk (7). Remove bolts (10) and shaft retainer (8). Remove hub (9) and seal
rings.
8. Remove bolts (12). Remove bearing retainer (11). Remove retaining ring (13). Remove
upper bearing race (16). Remove retaining ring (14). Remove bearing (15).
9. Reposition torque converter assembly (3) on Tooling (B) as shown. The weight of torque
converter assembly (3) is approximately 34 kg (76 lb).
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10. Remove bolts (17).
11. Attach Tooling (A) to impeller wheel assembly (18). Remove impeller wheel assembly (18).
The weight of impeller wheel assembly (18) is approximately 34 kg (76 lb).
12. Remove retaining ring (19) from bearing (20).
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13. Use Tooling (E) to separate shaft assembly (21) from bearing assembly (20) and carrier
assembly (22).
14. Remove bolts (23). Use Tooling (F) to remove stator assembly (24) from carrier assembly
(22) and impeller wheel assembly (18).
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15. Remove bolts (25). Use Tooling (C) to remove carrier assembly (22) from impeller wheel
assembly (18).
16. Using Tooling (C) and a suitable press to remove bearing (26) and gear (27) from carrier
assembly (22).
17. Remove seal ring (28).
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18. Remove seal rings (29). Remove retaining ring (30) from shaft assembly (21).
19. Install Tooling (D).
Note: Tooling (D) must be seated on the shoulder of turbine (31) in order to support turbine
and prevent damage. Tooling (D) must not contact the splines on shaft (21).
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20. Use a suitable press to remove shaft assembly (21) from turbine (31). Remove bearing race
(32) and the spacer from turbine (31).
21. Position housing assembly (2) as shown.
22. Remove bolts (33) and gear (34).
23. Remove retaining rings (35) from gear (34).
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24. Use a suitable press and Tooling (C) in order to remove bearing (36) and shaft from gear
(34).
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i04578058
Torque Converter - Assemble - Scraper
SMCS - 3101-016
Assembly Procedure
Table 1
Required Tools
A 138-7575 Link Brackets 3
B 1P-2420 Transmission Repair Stand 1
C 1P-0520 Driver Gp 1
G -
Threaded Rod
3/8-16 by 4.00
1
H - Locktite 242 1
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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1. Use a suitable press and Tooling (C) to install bearing (36) and shaft into gear (34).
2. Install retaining ring (35) on each side of gear (34) .
3. Position housing assembly (2) as shown.
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4. Install gear (34). Install bolts (33) .
5. Lower the temperature of shaft assembly (21). Install retaining ring (30). Install shaft
assembly (21) in the turbine (31) until ring (30) rests on the turbine (31). Install seal rings
(29) .
6. Install the spacer. Raise the temperature of bearing race (32). Install bearing race (32) on
shaft assembly (21) .
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7. Install seal ring (28) .
8. Install gear (27) to carrier assembly (22) .
9. Raise the temperature of bearing (26). Install bearing (26) on carrier assembly (22) .
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10. Position lower part of carrier assembly (22) under impeller wheel assembly (18) .
11. Install Tooling (G) to align carrier assembly (22) with impeller wheel assembly (18) .
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12. Install bolts (25). Tighten bolts (25) to a torque of 50 ± 7 N·m (37 ± 5 lb ft).
13. Position stator assembly (24) on carrier assembly (22). Apply Tooling (H) to bolts (23).
Install bolts (23). Tighten bolts (23) to a torque of 40 ± 5 N·m (30 ± 4 lb ft).
14. Install carrier assembly (22) and impeller wheel assembly (18) on turbine (31) and shaft
assembly (21) .
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Note: Install bearing (20) with Radius Side (X) facing down, toward carrier assembly (22).
15. Raise the temperature of bearing (20). Install bearing. Install retaining ring (19) .
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16. Attach Tooling (A) and a suitable lifting device to impeller wheel assembly (18). The
weight of impeller wheel assembly (18) is approximately 34 kg (76 lb). Install impeller
wheel assembly (18) into torque converter assembly (3) .
18. Reposition torque converter assembly (3) on Tooling (B). The weight of torque converter
assembly (3) is approximately 64 kg (142 lb).
19. Lower the temperature of bearing (15) and install bearing. Install retaining ring (14). Install
upper bearing race (16) and retaining ring (13) .
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20. Install bearing retainer (11). Install bolts (12). Tighten bolts (12) to a torque of 50 ± 7 N·m
(37 ± 5 ft).
21. Install hub (9). Install shaft retainer (8) and the seal rings. Install bolts (10). Tighten bolts
(10) to a torque of 50 ± 7 N·m (37 ± 5 lb ft). Install friction disk (7) .
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22. Install clutch piston (6) .
Note: When lowering cover assembly (5) down over clutch piston (6), align pins in cover
assembly (5) into notch on clutch piston (6).
23. Attach Tooling (A) and a suitable lifting device to cover assembly (5). Install cover
assembly (5) into torque converter assembly (3) .
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25. Attach Tooling (A) and a suitable lifting device to housing assembly (2). The weight of
housing assembly (2) is approximately 119 kg (263 lb). Lower housing assembly (2) onto
torque converter assembly (3). Install bolts (1) .
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Caterpillar Cat 637K Wheel Tractor Scraper (Prefix WTX) Service Repair Manual Instant Download.pdf

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