Caterpillar Cat 623G Wheel Tractor (Prefix DBC) Service Repair Manual (DBC00001 and up).pdf

Shutdown SIS
Previous Screen
Product: WHEEL TRACTOR
Model: 623G WHEEL TRACTOR DBC
Configuration: 623G Wheel Tractor DBC00001-UP (MACHINE) POWERED BY C15 Engine
Disassembly and Assembly
621G and 623G
Wheel Tractor-Scrapers
Power Train
Media Number -RENR7497-00 Publication Date -01/08/2005 Date Updated -04/08/2005
i02330950
Retarder and Bearing Cage (Drive Shaft) - Disassemble
SMCS - 3120-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 138-7575 Link Bracket 2
B
1P-0510 Driver Gp 1
8B-7551 Bearing Puller Gp 1
C
8B-7551 Bearing Puller Gp 1
8B-7548 Push-Puller Tool Gp 1
3H-0465 Push-Puller Plate 4
5F-7353 Washer 1
8B-7550 Push-Puller Leg 2
126-7176 Forcing Screw 1
D - Forcing Bolts1/2 - 13 NC by 3 inch 2
E 1P-0510 Driver Gp 1
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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisw...

Illustration 1 g01049519
1. Remove bolts (3) and retainer (4). Remove bolts (2) from stator (1) .
2. Install Tooling (A) and a suitable lifting device to stator (1). Remove stator (1) from
housing (5). The weight of stator (1) is approximately 23 kg (50 lb).
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3. Remove bolts (6) and spider (7) .
4. Remove deflector (10) from spider (7). Use Tooling (B) and a suitable press to remove
bearing (9). Remove retainer (8) .
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5. Install Tooling (A) and a suitable lifting device to rotor (12). Remove rotor (12) and shaft
(11) from housing (5) .
6. Remove rings (13) and rings (14) from both sides of the rotor.
7. Use Tooling (C) to remove carriers (15) from both sides of rotor (12) .
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8. Remove gear (16) from shaft (11) .
9. Remove bolts (17) .
10. Use Tooling (D) in order to remove cover (18) from housing (5) .
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11. Remove nut (19), retainer (20), and gear (21) .
12. Remove O-ring seal (22), washer (23), washer (25), and shaft (26) from gear (21) .
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13. Use Tooling (E) and a suitable press to remove bearing (24) from gear (21) .
14. Remove O-ring seal (27), bearing (28), and seal (29) from cover (18) .
15. Remove plugs (30), (31), and (32) from housing (5) .
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat Apr 10 18:44:37 UTC+0800 2021
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Shutdown SIS
Previous Screen
621G and 623G
Power Train
i02042129
Retarder and Bearing Cage (Drive Shaft) - Assemble
SMCS - 3120-016
Assembly Procedure
Table 1
Required Tools
A 138-7575 Link Bracket 2
E 1P-0510 Driver Gp 1
1. Install plugs (30), (31), and (32) into housing (5) .
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2. Install seal (29) and bearing (28) into cover (18). Install O-ring seal (27) onto cover (18) .
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3. Use Tooling (E) and a suitable press to install bearing (24) into gear (21) .
4. Install washer (25), shaft (26), washer (23), and O-ring seal (22) into gear (21) .
5. Install gear (21), retainer (20), and nut (19) .
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6. Install cover (18) and bolts (17) onto housing (5) .
7. Install gear (16) onto shaft (11) .
8. Install carriers (15) (not shown) onto both sides of rotor (12). Install rings (13) and rings
(14) onto both sides of rotor (12) .
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9. Install shaft (11) into housing (5) .
10. Install Tooling (A) and a suitable lifting device to rotor (12). Install rotor (12) onto housing
(5) .
11. Install retainer (8) onto spider (7). Use Tooling (E) and a suitable press to install bearing (9).
Install deflector (10) onto spider (7) .
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12. Install spider (7) and bolts (6) .
13. Install Tooling (A) and a suitable lifting device to stator (1). Install stator (1) onto housing
(5). The weight of stator (1) is approximately 23 kg (50 lb).
14. Install bolts (2) into stator (1). Tighten bolts (2) to a torque of 50 ± 7 N·m (37 ± 5 lb ft).
Install retainer (4) and bolts (3) .
Sat Apr 10 18:45:32 UTC+0800 2021
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Shutdown SIS
Previous Screen
621G and 623G
Power Train
i02042131
Retarder and Bearing Cage (Drive Shaft) - Install
SMCS - 3120-012
Installation Procedure
Table 1
Required Tools
A 2D-1201 Eyebolt 1
B 140-7742 Sleeve 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. Install Tooling (A) into retarder (2). Use Tooling (B) in order to protect the lifting strap
from other components of the machine. The weight of retarder (2) is approximately 109 kg
(240 lb).
3. Position retarder (2) and install bolts (7) .
4. Connect hose assembly (3) .
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5. Install tube assembly (4). Install hose (6) and tighten clamps (5) .
6. Connect hose assembly (1) .
End By:
a. Install the retarder hydraulic control valve. Refer to Disassembly and Assembly, "Retarder
Hydraulic Control Valve - Install".
b. Install the flywheel scavenge pump. Refer to Disassembly and Assembly, "Flywheel
Scavenge Pump - Install".
c. Install the drive shaft. Refer to Disassembly and Assembly, "Drive Shaft - Remove and
Install".
d. Install the secondary steering pump. Refer to Disassembly and Assembly, "Secondary
Steering Pump - Install".
Sat Apr 10 18:46:28 UTC+0800 2021
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Shutdown SIS
Previous Screen
621G and 623G
Power Train
i02301147
Bearing Cage (Drive Shaft) - Remove
SMCS - 3267-011
Removal Procedure
Table 1
Required Tools
A 2D-1201 Eyebolt 1
B 140-7742 Sleeve 1
C Forcing Bolt7/16 - 14 NC by 3.5 inch 2
ZZ
6V-9832 Cap As 2
6V-9511 Plug 2
Start By:
A. Remove the secondary steering pump. Refer to Disassembly and Assembly, "Secondary
Steering Pump - Remove".
B. Remove the drive shaft. Refer to Disassembly and Assembly, "Drive Shaft - Remove and
Install".
C. Remove the flywheel scavenge pump. Refer to Disassembly and Assembly, "Flywheel
Scavenge Pump - Remove".
Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN
PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS
SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.
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At operating temperature, the hydraulic oil is hot and under pressure.
Hot oils can cause burns.
To prevent possible personal injury, release the pressure in the work
tool hydraulic circuit (boom, stick, bucket, and swing), travel circuits,
and the hydraulic oil tank at the filler cap before any hydraulic lines or
components are disconnected or removed.
Remove the filler cap only when the engine is stopped and the filler cap
is cool enough to touch.
NOTICE
assembly.
contamination.
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, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
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1. Disconnect hose assembly (1) .
2. Install Tooling (A) into retarder housing (2). Use Tooling (B) in order to protect the lifting
strap from other components of the machine. The weight of retarder housing (2) is
approximately 109 kg (240 lb).
3. Disconnect hose assembly (3) .
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4. Loosen clamps (5) and remove hose (6). Remove tube assembly (4). Use a suitable
container to catch fluid leakage.
5. Remove bolts (7). Use Tooling (C) and remove retarder housing (2). The weight of retarder
housing (2) is approximately 109 kg (240 lb).
Sat Apr 10 18:47:24 UTC+0800 2021
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Shutdown SIS
Previous Screen
621G and 623G
Power Train
i02301148
Bearing Cage (Drive Shaft) - Disassemble
SMCS - 3267-015
Disassembly Procedure
Table 1
Required Tools
A Forcing Bolts1/2 - 13 NC by 3 inch 2
B 1P-0520 Driver Gp 1
C 1P-0510 Driver Gp 1
D 8B-7551 Bearing Puller Gp 1
Start By:
A. Remove the bearing cage. Refer to Disassembly and Assembly, "Bearing Cage (Drive
Shaft) - Remove".
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1. Remove bolts (1) and retainer (2) .
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2. Remove bolts (3). Use Tooling (A) in order to remove cover (4) .
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3. Remove spacer (9), gear (8), bearing (7), and shaft (6) from cover (4). Use Tooling (B) to
remove seal (5) .
4. Remove nut (10), retainer (11), bolt (17), seal (16), thrust washer (15), gear (14), and
bearing (13). Use Tooling (C) to remove thrust washer (12) .
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5. Remove bolts (20), spider (19), and deflector (18) .
6. Use Tooling (C), Tooling (D), and a suitable press to remove bearing (21) and retainer (22)
from spider (19) .
Sat Apr 10 18:48:19 UTC+0800 2021
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Shutdown SIS
Previous Screen
621G and 623G
Power Train
i02040714
Bearing Cage (Drive Shaft) - Assemble
SMCS - 3267-016
Assembly Procedure
Table 1
Required Tools
B 1P-0520 Driver Gp 1
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1. Install retainer (22) onto spider (19). Raise the temperature of bearing (21). Install bearing
(21) onto spider (19) .
2. Install deflector (18), spider (19), and bolts (20) .
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3. Install thrust washer (12), bearing (13), gear (14), thrust washer (15), seal (16), bolt (17),
retainer (11), and nut (10) onto cover (4) .
4. Use Tooling (B) to install seal (5). Install shaft (6), bearing (7), gear (8), and spacer (9) onto
cover (4) .
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5. Install cover (4) and bolts (3) .
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6. Install retainer (2) and bolts (1) .
End By: Install the bearing cage. Refer to Disassembly and Assembly, "Bearing Cage (Drive
Shaft) - Install".
Sat Apr 10 18:49:15 UTC+0800 2021
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Shutdown SIS
Previous Screen
621G and 623G
Power Train
i02044770
Bearing Cage (Drive Shaft) - Install
SMCS - 3267-012
Installation Procedure
Table 1
Required Tools
A 2D-1201 Eyebolt 1
B 140-7742 Sleeve 1
NOTICE
assembly.
contamination.
1/3(W)
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Caterpillar Cat 623G Wheel Tractor (Prefix DBC) Service Repair Manual (DBC00001 and up).pdf

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Caterpillar Cat 623G Wheel Tractor (Prefix DBC) Service Repair Manual (DBC00001 and up).pdf