Caterpillar Cat 627G Wheel Tractor (Prefix CEX) Service Repair Manual Instant Download.pdf

Service Repair Manual
Models
627G Wheel Tractor

Shutdown SIS
Previous Screen
Product: WHEEL TRACTOR
Model: 627G WHEEL TRACTOR CEX
Configuration: 627G Wheel Tractor CEX00001-UP (MACHINE) POWERED BY 3406E Engine
Disassembly and Assembly
627G Wheel Tractor Power Train
Media Number -RENR4228-02 Publication Date -01/08/2007 Date Updated -17/08/2007
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/siswe...

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.
Wed May 5 15:29:55 UTC+0800 2021
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Shutdown SIS
Previous Screen
i07232119
Transfer Gears - Assemble
SMCS - 3159-016
Assembly Procedure
Table 1
Required Tools
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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Shutdown SIS
Previous Screen
i02301157
Transfer Gears - Install - Off Chassis
SMCS - 3159-012
Installation Procedure
Table 1
Required Tools
1. Install O-ring seals (5) to transmission (1). Install O-ring seal (4) to transfer gear assembly
(2) .
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2. Attach Tooling (A) and a suitable lifting device to transfer gear assembly (2), as shown. The
weight of transfer gear assembly (2) is approximately 340 kg (750 lb).
3. Connect transfer gear assembly (2) to transmission (1) .
4. Install the nuts and bolts (3) that hold transfer gear assembly (2) to transmission (1). Tighten
the nuts to a torque of 55 ± 10 N·m (41 ± 7 lb ft).
5. Remove Tooling (A) from transfer gear assembly (2) .
End By:
a. Install the speed sensor. Refer to Disassembly and Assembly, "Speed Sensor (Transmission)
- Install".
b. Install the transmission, the torque converter and the transfer gears. Refer to Disassembly
and Assembly, "Transmission, Torque Converter and Transfer Gears - Install".
Wed May 5 15:31:47 UTC+0800 2021
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Shutdown SIS
Previous Screen
i02038459
Transfer Gears - Install - In Chassis
SMCS - 3159-012
Installation Procedure
Table 1
Required Tools
C 1/2 - 13 NC by 6 inch Threaded Rod 2
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 the O-ring seal to the transfer gear case.
4. Install Tooling (C) in the transmission case.
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5. Use Tooling (A) and a suitable lifting device to position the transfer gear case to the
transmission.
6. Remove Tooling (C). Install the nuts (not shown) and bolts (3) that secure the transfer gear
case to the transmission case. Tighten the nuts (not shown) and bolts (3) to a torque of 105 ±
20 N·m (77 ± 15 lb ft).
7. Install the piston pump for the cushion-hitch. Refer to Machine Systems Disassembly and
Assembly, "Piston Pump (Cushion-Hitch) - Install".
8. Install the vane pump for the hydraulic system and the steering system. Refer to Machine
Systems Disassembly and Assembly, "Vane Pump (Hydraulic and Steering) - Install".
9. Install the drive shaft. Refer to Disassembly and Assembly, "Drive Shaft - Remove and
Install".
10. Install the speed sensor. Refer to Disassembly and Assembly, "Speed Sensor (Transmission)
- Install".
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11. Install drain plugs (1) and (2). Fill the transmission case with oil. Refer to Operation and
Maintenance Manual for the appropriate oil and the procedure to fill the transmission case.
12. Install the power train guard. Refer to Disassembly and Assembly, "Power Train Guard
(Transmission) - Remove and Install".
Wed May 5 15:32:43 UTC+0800 2021
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Shutdown SIS
Previous Screen
i02036659
Torque Converter - Remove
SMCS - 3101-011
Removal Procedure
Table 1
Required Tools
A 1P-2420 Transmission Repair Stand 1
B 138-7575 Link Bracket 2
C 2P-8312 Retaining Ring Pliers 1
Start By:
A. Remove the transmission hydraulic control valve. Refer to Disassembly and Assembly,
"Transmission Hydraulic Control Valve - Remove".
B. Separate the transfer gears from the transmission. Refer to Disassembly and Assembly,
"Transfer Gears - Separate".
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1. Install the transmission onto Tooling (A) (not shown). Attach Tooling (B) and a suitable
lifting device to transmission planetary (1). Remove the bolts that hold transmission
planetary (1) to case (2) .
2. Remove transmission planetary (1) and torque converter (3) as a unit from case (2). The
weight of transmission planetary (1) and torque converter (3) as a unit is approximately 703
kg (1550 lb).
3. Position transmission planetary (1) and torque converter (3) as a unit onto blocks. Remove
Tooling (B) and the suitable lifting device from transmission planetary (1) .
4. Attach Tooling (B) and a suitable lifting device to case (2). Remove case (2) from Tooling
(A). The weight of case (2) is approximately 90 kg (200 lb).
5. Use Tooling (B) and a suitable lifting device to position transmission planetary (1) and
torque converter (3) onto Tooling (A) (not shown).
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6. Use Tooling (C) in order to remove retaining ring (4) from shaft (6). Remove washer (5)
from shaft (6) .
7. Remove nuts (7) that hold torque converter (3) to transmission planetary (1). Remove torque
converter (3) from transmission planetary (1). The weight of torque converter (3) is
approximately 70 kg (154 lb).
Wed May 5 15:33:38 UTC+0800 2021
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Shutdown SIS
Previous Screen
i02121675
Torque Converter - Disassemble
SMCS - 3101-015
Disassembly Procedure
Table 1
Required Tools
A 2P-8312 Retaining Ring Pliers 1
B 1P-0510 Driver Group 1
C 3/8 by 16 Forcing Screw 2
Start By:
A. Remove the torque converter. Refer to Disassembly and Assembly, "Torque Converter -
Remove".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the
component should be thoroughly cleaned. This will help to prevent dirt from entering the internal
mechanism.
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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 press in
order to remove the sleeve bearing from carriage support assembly (2) .
2. Remove bolts (4) and the washers from torque converter impeller (5). Remove bolts (6), the
washers, and clamp plate (7) from impeller hub (8) .
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3. Install Tooling (C) in torque converter impeller (5). Use Tooling in order to remove torque
converter impeller (5) and impeller hub (8) from housing (9) .
4. Remove metal seal ring (10) from torque converter impeller (5). Remove impeller hub (8)
from torque converter impeller (5) .
5. Remove thrust bearing (11) from carrier assembly (12) .
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6. Remove carrier assembly (12) and torque converter stator (13) as a unit from housing (9) .
7. Position carrier assembly (12) and torque converter stator (13), as shown. Use Tooling (A)
in order to remove retaining ring (14) from torque converter stator (13). Remove thrust race
(15) from torque converter stator (13) .
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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.
8. Remove freewheel rollers (16) and freewheel springs (17) from freewheel cam (18).
Remove torque converter stator (13) from carrier assembly (12) .
9. Use Tooling (A) in order to remove retaining ring (19) from torque converter stator (13).
Remove side plate (20) from torque converter stator (13) .
10. Use Tooling (B) and a suitable press in order to remove freewheel cam (18) (not shown)
from torque converter stator (13) .
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11. Remove thrust bearing (21) from carrier assembly (12). Remove sleeve bearing (22) from
carrier assembly (12) .
12. Remove torque converter turbine (23) and hub (3) as a unit from housing (9) .
13. Remove thrust bearing (24) and thrust race (25) from hub (3) .
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14. Position torque converter turbine (23), as shown. Remove thrust race (26) from hub (3). Put
an alignment mark on torque converter turbine (23) and hub (3) for installation purposes.
Remove bolts (27) from torque converter turbine (23) .
15. Remove clamp ring (28) and torque converter 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) .
Wed May 5 15:34:34 UTC+0800 2021
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Shutdown SIS
Previous Screen
i02121676
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
D 8T-5096 Dial Indicator Group 1
1. Use Tooling (B) and a suitable press in order to install sleeve bearing (33) to flange (32) .
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2. Install bolts (31) and flange (32) to housing (9). Tighten bolts (31) to the torque 120 ± 15
N·m (89 ± 11 lb ft).
3. Install thrust bearing (29) and thrust race (30) to housing (9) .
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Suggest:
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4. Install torque converter turbine (23) and clamp ring (28) to hub (3) .
5. Install bolts (27) to torque converter turbine (23). Tighten bolts (27) to a torque of 50 ± 7
N·m (37 ± 5 lb ft). Install thrust race (26) to hub (3) .
6. Install thrust race (25) and thrust bearing (24) to hub (3) .
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