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

Service Repair Manual
Models
637K Wheel Tractor Scraper

Shutdown SIS
Previous Screen
Product: WHEEL SCRAPER
Model: 637K WHEEL SCRAPER WTT
Configuration: 637K Wheel Tractor Scraper WTT00001-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
i04351575
Torque Converter - Disassemble - Scraper
SMCS - 3101-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
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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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisw...

Illustration 1 g02477139
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).
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Fri Aug 27 00:31:40 UTC+0800 2021
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Shutdown SIS
Previous Screen
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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End By: Connect the torque converter, transmission, and transfer gear.
Fri Aug 27 00:32:36 UTC+0800 2021
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Shutdown SIS
Previous Screen
i06636123
Torque Converter - Assemble
SMCS - 3101-016
Assembly Procedure
Table 1
Required Tools
A 2P-8312 Retaining Ring Pliers 1
B 1P-0510 Driver Group 1
1. Use Tooling (B) and a suitable hydraulic press to install sleeve bearing (33) into flange (32).
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2. Position flange (32) and install bolts (31) onto housing (9). Tighten bolts (31) to a torque of
120 ± 15 N·m (89 ± 11 lb ft).
3. Install thrust bearing (29) and thrust race (30) into housing (9).
4. Install turbine (23) and clamp ring (28) onto hub (3).
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5. Install bolts (27) into turbine (23). Tighten bolts (27) to a torque of 50 ± 7 N·m
(37 ± 5 lb ft). Install thrust race (26) onto hub (3).
6. Install thrust race (25) and thrust bearing (24) onto hub (3).
7. Install turbine (23) and hub (3) as a unit into housing (9).
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8. Use Tooling (B) and a suitable press to install sleeve bearing (22) into carrier assembly (12).
Install thrust bearing (21) onto carrier assembly (12).
9. Install side plate (20) to stator (13). Use Tooling (A) to install retaining ring (19) to stator
(13).
10. Use Tooling (B) and a suitable hydraulic press to install freewheel cam (18) into stator (13).
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11. Install stator (13) to carrier assembly (12). Install freewheel springs (16) and freewheel
rollers (17) to freewheel cam (18). Always install new freewheel springs (16) and freewheel
rollers (17). Install freewheel springs (16) with the maximum number of loops in freewheel
springs (16) to the outside of freewheel cam (18). Stator (13) should turn freely in the
clockwise direction. Stator (13) should not turn freely in the counterclockwise direction.
12. Install thrust race (15) to stator (13). Use Tooling (A) to install retaining ring (14) onto
stator (13).
13. Install carrier assembly (12) and stator (13) as a unit into housing (9).
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14. Install thrust bearing (11) and seal ring (12A) onto carrier assembly (12).
15. Install impeller hub (8) to impeller (5). Install thrust race (10) onto impeller (5).
16. Install clamp plate (7) and bolts (6) onto impeller hub (8). Tighten bolts (6) to a torque of
50 ± 7 N·m (37 ± 5 lb ft).
17. Install bolts (4) into impeller (5). Tighten bolts (4) to a torque of 50 ± 7 N·m (37 ± 5 lb ft).
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18. Use Tooling (B) and a suitable press to install the sleeve bearing in carriage support
assembly (2). Install the sleeve bearing until the sleeve bearing is flush with the outside
machined surface of carriage support assembly (2).
19. Install carriage support assembly (2) onto hub (3). Use Tooling (A) to install retaining ring
(1) onto carriage support assembly (2).
End By:
a. Install the torque converter. Refer to Disassembly and Assembly, "Torque Converter -
Install".
Fri Aug 27 00:33:32 UTC+0800 2021
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Shutdown SIS
Previous Screen
i02301155
Transfer Gears - Disassemble
SMCS - 3159-015
Disassembly Procedure
Table 1
Required Tools
A 138-7575 Link Bracket 1
B
8B-7548 Push-Puller Tool Gp 1
8B-7551 Bearing Puller Gp 1
1P-0498 Drive Plate 1
C
5P-4170 Step Plate 1
1P-2321 Combination Puller 1
D
8B-7554 Bearing Cup Puller Gp 1
5P-4170 Step Plate 1
1P-0518 Drive Plate 1
E
8B-7560 Step Plate 1
5F-7345 Screw 1
8B-7554 Bearing Cup Puller Gp 1
F -
Bolts
3/8" - 16 NC by 3 inch
3
Start By:
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a. Remove the transfer gear case. Refer to Disassembly and Assembly, "Transfer Gears -
Remove".
b. Remove the transmission oil filter base. Refer to Disassembly and Assembly, "Transmission
Oil Filter Base - Remove and Install".
c. Remove the transmission scavenge pump. Refer to Disassembly and Assembly,
"Transmission Scavenge Pump - Remove".
d. Remove the transmission oil pump. Refer to Disassembly and Assembly, "Transmission Oil
Pump - Remove".
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.
NOTICE
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will
reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always
plug or cap the lines, fittings, or hoses as they are disconnected. Cover
any disassembled components and clean them properly before
assembly.
Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
1. Put identification marks on components for installation purposes.
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2. Remove the bolts that secure bearing cage (1) to the transfer gear case. Use Tooling (F) in
order to separate bearing cage (1) from the transfer gear case.
3. Remove bearing cage (1), shims (2), and pump drive gear (3) from the transfer gear case.
5. Remove bearing cage (4), shims (5), and gear (6) from the transfer gear case.
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6. Remove bearing cups (7) and (8) from the transfer gear case. Attach Tooling (A) and a
suitable lifting device onto the transfer gear case. The weight of the transfer gear case is
approximately 340 kg (750 lb). Turn over the transfer gear case. Remove Tooling (A).
8. Remove bearing cage (9), shims (10), and gear (11) from the transfer gear case.
9. Remove bearing cup (12) from the transfer gear case. Attach Tooling (A) and a suitable
lifting device onto the transfer gear case. Turn over the transfer gear case.
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10. Remove bolts (13) that secure bearing cage (14) to the transfer gear case. If necessary, rotate
the gear until the three threaded holes are visible in bearing cage (14). Install Tooling (F)
through gear (15) and into bearing cage (14). Tighten Tooling (F) evenly until bearing cage
(14) and gear (15) separate from the transfer gear case. Remove bearing cage (14) and gear
(15) as a unit from the transfer gear case.
11. Remove retaining ring (16) from gear (15). Remove bearing (17) and bearing cage (14)
from gear (15).
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12. Remove bearing (17) from bearing cage (14).
13. Remove bolts (19) and separate gear (20) from gear (11). Use Tooling (B) to remove
bearing cone (18) from gear (11). Repeat the procedure for the bearing cone on the opposite
side of the gear.
14. Use Tooling (C) to remove bearing cone (21) from gear (6). Repeat the procedure for the
bearing cone on the opposite side of gear (6).
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15. Use Tooling (C) to remove bearing cone (22) from gear (3). Repeat the procedure for the
bearing cone on the opposite side of gear (3).
16. Use Tooling (D) to remove bearing cup (23) from bearing cage (4). Remove O-ring seal
(24) from bearing cage (4).
17. Remove bearing cup (25) from bearing cage (9).
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