Caterpillar Cat 631G Wheel Tractor (Prefix DFA) Service Repair Manual Instant Download.pdf

Shutdown SIS
Previous Screen
Product: WHEEL TRACTOR
Model: 631G WHEEL TRACTOR DFA
Configuration: 631G Wheel Tractor DFA00001-UP (MACHINE) POWERED BY C18 Engine
Disassembly and Assembly
631G Wheel Tractor-Scraper Power Train
Media Number -RENR8604-01 Publication Date -01/08/2010 Date Updated -09/08/2010
i02301155
Transfer Gears - Disassemble
SMCS - 3159-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
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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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisw...

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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Illustration 1 g01048669
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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18. Use Tooling (E) to remove bearing cup (26) from bearing cage (1). Remove O-ring seal (27)
from bearing cage (1).
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon Jun 14 08:38:06 UTC+0800 2021
8/8(W)
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Shutdown SIS
Previous Screen
i07232119
Transfer Gears - Assemble
SMCS - 3159-016
Assembly Procedure
Table 1
Required Tools
A 138-7575 Link Bracket 1
G 1P-0510 Driver Group 1
H 8T-5096 Dial Indicator 1
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.
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1. Clean all parts and inspect all parts. If any parts are worn or damaged, use new parts for
replacement.
2. Lubricate O-ring seals with the lubricant that is being sealed.
3. Install bearing (17) into bearing cage (14).
4. Use Tooling (G) to install bearing (17) and bearing cage (14) to gear (15). Install bearing
(17) and bearing cage (14) until the retaining ring groove is visible. Install retaining ring
(16) to gear (15).
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5. Position gear (15) and bearing cage (14) in the transfer gear case. Install bolts (13) that
secure bearing cage (14) to the transfer gear case. Tighten bolts (13) to a torque of
55 ± 10 N·m (41 ± 7 lb ft).
6. Install O-ring seal (27) onto bearing cage (1). Lower the temperature of bearing cup (26).
Install bearing cup (26) to bearing cage (1). Check that bearing cup (26) is seated in the bore
of bearing cage (1).
7. Lower the temperature of bearing cup (25). Install bearing cup (25) to bearing cage (9).
Check that bearing cup (25) is seated in the bore of bearing cage (9).
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8. Install O-ring seal (24) to bearing cage (4). Lower the temperature of bearing cup (23).
Install bearing cup (23) to bearing cage (4). Check that bearing cup (23) is seated in the bore
of bearing cage (4).
9. Raise the temperature of bearing cone (22). Install bearing cone (22) on gear (3). Repeat the
procedure for the bearing cone on the opposite side of gear (3).
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10. Raise the temperature of bearing cone (21). Install bearing cone (21) on gear (6). Repeat the
procedure for the bearing cone on the opposite side of gear (6).
11. Raise the temperature of bearing cone (18). Install bearing cone (18) on gear (11). Repeat
the procedure for the bearing cone on the opposite side of gear (11).
12. Position gear (20) on gear (11). Install bolts (19). Tighten bolts (19) to a torque of
55 ± 10 N·m (41 ± 7 lb ft). 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).
13. Lower the temperature of bearing cup (12). Use Tooling (G) to install bearing cup (12) to
the transfer gear case. Check that bearing cup (12) is seated in the bore of the transfer gear
case.
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14. Position gear (11) in the transfer gear case. Install bearing cage (9) and shims (10). Install
bolts (28) that hold bearing cage (9) in position. Tighten bolts (28) to a torque of
55 ± 10 N·m (41 ± 7 lb ft).
15. Position Tooling (H) in the transfer gear case, as shown. Make sure that the dial indicator is
in contact with gear (11). Use a pry bar to move gear (11) up and down. Adjust shims (10)
to obtain an end play of 0.15 ± 0.05 mm (0.006 ± 0.002 inch). Tighten bolts (28) to a torque
of 55 ± 10 N·m (41 ± 7 lb ft).
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16. Use Tooling (G) to install bearing cups (7) and (8) to the transfer gear case. Check that
bearing cups (7) and (8) is seated in the bore of the transfer gear case.
17. Position gear (6) in the transfer gear case with the internal snap ring groove facing up.
Install bearing cage (4) and shims (5). Install the bolts (29) that hold bearing cage (4) in
position. Tighten bolts (29) to a torque of 55 ± 10 N·m (41 ± 7 lb ft).
18. Attach Tooling (A) and a suitable lifting device to the transfer gear case. Place the transfer
gear case on wood blocks, as shown. Position Tooling (H) on the transfer gear case, as
shown. Make sure that the dial indicator is in contact with gear (6). Use a pry bar to move
gear (6) up and down. Adjust shims (5) to obtain an end play of 0.15 ± 0.05 mm
(0.006 ± 0.002 inch). Tighten bolts (29) to a torque of 55 ± 10 N·m (41 ± 7 lb ft).
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19. Position gear (3) in the transfer gear case. Install bearing cage (1) and shims (2). Install the
bolts (30) that hold bearing cage (1) in position. Tighten bolts (30) to a torque of
55 ± 10 N·m (41 ± 7 lb ft).
20. Position Tooling (H) on the transfer gear case, as shown. Make sure that the dial indicator is
in contact with gear (3). Use a pry bar to move gear (3) up and down. Adjust shims (2) to
obtain an end play of 0.15 ± 0.05 mm (0.006 ± 0.002 inch). Tighten bolts (30) to a torque of
55 ± 10 N·m (41 ± 7 lb ft).
End By:
a. Install the transmission oil pump. Refer to Disassembly and Assembly, "Transmission Oil
Pump - Install".
b. Install the transmission scavenge pump. Refer to Disassembly and Assembly, "Transmission
Scavenge Pump - Install".
c. Install the transmission oil filter base. Refer to Disassembly and Assembly, "Transmission
Oil Filter Base - Remove and Install".
d. Install the transfer gear case. Refer to Disassembly and Assembly, "Transfer Gears -
Install".
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Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon Jun 14 08:39:02 UTC+0800 2021
9/9(W)
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Shutdown SIS
Previous Screen
i02568748
Transmission Planetary - Disassemble
SMCS - 3030-015
Disassembly Procedure
Table 1
Required Tools
A 1P-2420 Transmission Repair Stand 1
B FT-0833 Clamp 2
C 2P-8312 Retaining Ring Pliers 1
D FT-1335 Transmission Fixture 1
E 1P-0520 Driver Group 1
F 138-7575 Link Bracket 2
G 138-7573 Link Bracket 2
H -
Forcing Bolt
3/8 - 16 NC by 3 inch
2
Start By:
A. Separate the transfer gears from the transmission. Refer to Disassembly and Assembly ,
"Torque Converter, Transmission and Transfer Gear - Separate".
B. Remove the transmission hydraulic control valve. Refer to Disassembly and Assembly ,
"Transmission Hydraulic Control Valve - Remove".
NOTICE
1/36(W)
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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, "Caterpillar Dealer Service
Tool Catalog" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
1. Install Tooling (F) and a suitable lifting device onto transmission assembly (1) . Position
transmission assembly (1) onto Tooling (A) . The transmission assembly weighs
approximately 703 kg (1550 lb).
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2. Remove bolts (2) . Remove the transmission assembly from transmission housing (3) .
Position the transmission assembly ontosuitable blocks.
3. Remove bolts (4) from clutch housing (5) .
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.
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4. Use Tooling (B) in order to hold the piston into clutch housing (5) . Install Tooling (F) and a
suitable lifting device onto clutch housing (5) . Remove clutch housing (5) from the
transmission assembly. The weight of clutch housing (5) is approximately 27 kg (60 lb).
5. Remove piston (6) from clutch housing (5) . Remove a seal ring (7) from piston (6) and
from clutch housing (5) .
Note: Friction discs and clutch plates that are removed from each clutch housing should be
kept with the correct clutch housing. Mixing the clutch plates and friction discs may cause
improper operation of the transmission or damage to the transmission.
6. Remove springs (8) , dowels (9) , friction discs (10) and clutch plates (11) from clutch
housing (12) .
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7. Remove ring gear (13) from clutch housing (12) .
8. Use Tooling (B) in order to hold the piston into clutch housing (12) . Install Tooling (F) and
a suitable lifting device onto clutch housing (12) . Remove clutch housing (12) from
housing assembly (14) . The weight of clutch housing (12) is approximately 27 kg (60 lb).
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9. Remove piston (15) from clutch housing (12) . Remove seal rings (16) from piston (15) and
10. Remove springs (17) , dowels (18) , friction discs (19) and clutch plates (20) from housing
assembly (14) .
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11. Remove retaining ring (21) from shaft (22) .
12. Install Tooling (G) and a suitable lifting device onto carrier assembly (23) . Remove carrier
assembly (23) from housing assembly (14) . The weight of carrier assembly (14) is
approximately 34 kg (75 lb).
13. Remove bolts (24) and oil slinger (25) from carrier assembly (23) . Remove bearing (26)
from carrier assembly (23) .
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14. Use a hammer and a punch in order to push pin (27) into shaft (28) .
15. Remove shaft (28) , thrust discs (29) and planetary gears (30) from carrier assembly (23) .
Remove pin (27) from shaft (28) .
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16. Remove bearings (31) from planetary gear (30) .
17. Repeat Steps 14, 15, and 16 in order to remove the remaining shaft assemblies.
19. Remove shaft (33) , thrust discs (34) and gear (35) from carrier assembly (23) . Remove
tube (36) from shaft (33) . Remove pin (32) from shaft (33) .
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20. Remove bearings (37) from gear (35) .
21. Repeat Steps 18, 19, and 20 in order to remove the remaining three shaft assemblies from
the carrier assembly.
22. Remove bolts (39) and plates (40) from clutch housing (41) . Remove ring gear (42) from
clutch housing (41) .
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23. Remove bolts (43) that secure clutch housing (41) to housing assembly (14) .
24. Use Tooling (B) in order to hold the piston into clutch housing (41) . Install Tooling (F) and
a suitable lifting device onto clutch housing (41) . Remove clutch housing (41) from
housing assembly (14) . The weight of clutch housing (41) is approximately 34 kg (75 lb).
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25. Remove piston (44) from clutch housing (41) . Remove a seal ring (45) from piston (44) and
26. Remove springs (46) , friction discs (47) , and clutch plates (48) from housing assembly
(14) .
27. Remove ring gear (49) from housing assembly (14) . Remove plate assembly (50) from
housing assembly (14) .
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28. Remove retaining ring (51) from shaft (22) . Remove sun gear (52) and sun gear (53) from
shaft (22) .
29. Remove bolts (54) in order to remove carrier assembly (55) from housing assembly (14) .
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30. Install Tooling (G) and a suitable lifting device onto carrier assembly (55) . Remove carrier
assembly (55) from housing assembly (14) . The weight of carrier assembly (55) is
approximately 23.5 kg (51.8 lb).
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Caterpillar Cat 631G Wheel Tractor (Prefix DFA) Service Repair Manual Instant Download.pdf

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