Caterpillar Cat 312C Excavator (Prefix CBT) Service Repair Manual (CBT00001 and up).pdf

Service Repair Manual
Models
312C and 312C L Excavator

Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 312C L EXCAVATOR CBT
Configuration: 312C & 312C L Excavators CBT00001-UP (MACHINE) POWERED BY 3054T Engine
Disassembly and Assembly
312C Excavator Machine Systems
Media Number -RENR7476-00 Publication Date -01/07/2003 Date Updated -22/07/2003
i06252122
Swing Drive - Disassemble - Older Style
SMCS - 5459-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 1P-0510 Driver Gp 1
C 5F-7343 Bearing Puller Gp 1
Start By:
a. Remove the swing motor.
b. Remove the swing drive.
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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312C & 312C L Excavators CBT00001-UP (MACHINE) POWERED BY 3054T Engi...
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Illustration 1 g01001554
1. Use a suitable lifting device to place the swing drive on Tooling (A). The weight of the
swing drive is approximately 84 kg (185 lb).
2. Remove sun gear (1) from carrier assembly (2).
3. Remove carrier assembly (2) from ring gear (3).
4. Use the following procedure to disassemble carrier assembly (2).
a. Use a hammer and a punch to drive spring pin (5) into planetary shaft (4). Repeat for
the remaining planetary shafts.
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b. Remove planetary shafts (4), planetary gears (7), and thrust washers (6) from the
carrier assembly.
c. Remove bearings (8) from planetary gears (7).
d. Use a hammer and a punch to remove pins (5) from planetary shafts (4).
5. Remove washer (9) from the carrier assembly.
6. Remove sun gear (10) and ring gear (11) from the swing drive.
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7. Loosen bolt (12) until approximately one half of the threads are out of the shaft.
8. Use a suitable lifting device to position remaining components with the pinion gear on top.
The weight of the components is approximately 66 kg (145 lb).
9. Remove bolts (13).
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10. Use a suitable lifting device to position carrier assembly (14) and swing drive housing (15)
in a suitable press. Support the bottom of swing drive housing (15) on suitable cribbing.
11. Carefully press bolt (12) in order to force the pinion shaft, the bearings, and the cage out of
carrier assembly (14) and swing drive housing (15).
12. Remove carrier assembly (14) with the bearing cone from the swing drive housing.
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13. Use Tooling (B), Tooling (C), and a suitable press to remove carrier assembly (14) from
bearing cone (18). Support Tooling (C) with suitable blocks. Place support under carrier
assembly (14) in order to prevent carrier assembly (14) from dropping to the floor.
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14. Use the following procedure to disassemble carrier assembly (14).
a. Use a hammer and a punch to drive spring pin (20) into planetary shaft (19). Repeat
for the remaining planetary shafts.
b. Remove planetary shafts (19), thrust washers (21), and planetary gears (22) from the
carrier assembly.
c. Remove bearings (23) from planetary gears (22).
d. Use a hammer and a punch to remove spring pins (20) from planet shafts (19).
15. Remove retainer (24) from carrier assembly (14).
16. Remove spacers (25) and (26) from the remaining pinion and bearing assembly.
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17. Place the pinion and bearing assembly in a suitable press. Use Tooling (B) and Tooling (C)
to remove bearing cone (28) from shaft (27). Place support under shaft (27) in order to
prevent shaft (27) from dropping to the floor.
18. Remove cage (29) from shaft (27).
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19. Remove lip seal (30) from cage (29).
20. Remove bearing cup (31) from swing drive housing (15).
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21. Flip swing drive housing (15) and remove bearing cup (32).
Newer Style
Table 2
Required Tools
A 5F-7343 Bearing Puller Gp 1
Start By:
a. Remove the swing motor.
b. Remove the swing drive.
NOTICE
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312C & 312C L Excavators CBT00001-UP (MACHINE) POWERED BY 3054T E...
2020/5/17

1. Use a suitable lifting device to place the swing drive on table. The weight of the swing drive
is approximately 84 kg (185 lb).
2. Remove sun gear (1) from carrier assembly (2).
3. Remove carrier assembly (2) from ring gear (3).
4. Remove retaining ring (4). Remove thrust washer (5) and planetary gear (6).
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5. Remove bearing assembly (6) and thrust washer (7).
6. Drive spring pin (9) into shaft (8). Remove shaft (8) from carrier assembly (2).
7. Repeat Steps 4 through 6 for the remaining planetary gears.
8. Remove sun gear (10) from the planetary carrier assembly.
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9. Remove ring gear (11) from housing (12).
10. Remove planetary carrier assembly (13) from the pinion shaft.
11. Drive spring pin (15) into shaft (14) in order to remove shaft (14) and the planetary gear
assembly.
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12. Remove shaft (14), thrust washer (16), bearings (17), planetary gear (18), and thrust washer
(19). Repeat Steps 11 through 12 for the remaining planetary gear assemblies.
13. Turn the housing and the pinion shaft assembly over and remove plates (20).
14. Remove retaining ring (21) in order to remove pinion shaft (22).
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15. Use a suitable press to remove pinion shaft (22) from the bearings and housing assembly
(12).
Note: Take some precaution to prevent the pinion shaft from dropping out of the bottom.
16. Remove bearing (23) and seal (24) from the housing.
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17. Use Tooling (A) and a suitable press to remove bearing assembly (25) from pinion shaft
(22). Support Tooling (A) with suitable blocks. Place support under pinion shaft (22) in
order to keep from dropping to the floor.
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All Rights Reserved.
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 312C L EXCAVATOR CBT
Configuration: 312C & 312C L Excavators CBT00001-UP (MACHINE) POWERED BY 3054T Engine
Disassembly and Assembly
312C Excavator Machine Systems
Media Number -RENR7476-00 Publication Date -01/07/2003 Date Updated -22/07/2003
i07420705
Swing Drive - Assemble - Older Style
SMCS - 5459-016
Assembly Procedure
Table 1
Required Tools
A 1P-2420 Transmission Repair Stand 1
B 1P-0510 Driver Gp 1
D FT-1317 Sleeve 1
E 5P-3413 Pipe Sealant -
F - Loctite High Flex Form-In-Place Gasket -
G
5P-8247 Hard Washer 2
5P-8245 Hard Washer 2
4C-5655 Threaded Adapter 2
8B-7550 Push-Puller Leg 2
1U-9895 Crossblock 1
3H-0465 Push-Puller Plate 4
6B-6682 Full Nut 2
9U-5017 Torque Wrench 1
0V-0375 Bolt 1
1F-7958 Full Nut 1
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- Loctite 243 -
NOTICE
1. Apply a thin coating of Tooling (E) to the seal bore in cage (29). Install lip seal (30) in cage
(29).
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2. Install shaft (27) in cage (29).
3. Raise the temperature of bearing cone (28) and place bearing cone (28) on shaft (27).
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4. Use Tooling (B), Tooling (D), and a suitable press to install bearing cone (28) on the shaft.
5. Lower the temperature of bearing cup (32). Install bearing cup (32) in swing drive housing
(15).
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6. Flip swing drive housing (15). Lower the temperature of bearing cup (31). Install bearing
cup (31) in swing drive housing (15).
7. Clean the mating surfaces of swing drive housing (15) and cage (29). Apply a thin coating
of Tooling (F) to the mating surfaces of cage (29) and swing drive housing (15).
8. Install the assembled shaft (27) and cage (29) in swing drive housing (15).
9. Apply Tooling (H) to the threads of bolts (13). Install bolts (13). Tighten bolts (13) to torque
of 33 ± 3 N·m (25 ± 2 lb ft).
5/18
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10. Install spacers (25) and (26).
11. Set up Tooling (G), as shown. Check and record the seal drag torque.
Note: Make sure that the shaft does not turn when the seal drag torque is checked.
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12. Use the following procedure to assemble the carrier assembly:
a. Install bearing (23) in planetary gear (22).
b. Place thrust washer (21) on each side of the assembled bearing and planetary gear.
c. Slide thrust washers (21), bearing (23), and planetary gear (22) into the carrier
assembly.
d. Install planetary shaft (19) so that the hole for spring pin (20) aligns with the hole in
the carrier assembly.
e. Use a hammer to drive spring pin (20) into the carrier assembly and the planetary
shaft.
f. Repeat Steps 12.a through 12.e for the remaining planetary gear sets.
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13. Raise the temperature of bearing cone (18). Use Tooling (B) and Tooling (D) to install
bearing cone (18) on carrier assembly (14).
14. Use a suitable lifting device to place swing drive housing (15) with shaft (27), cage (29),
and bearing cone (28) on Tooling (A). Refer to Illustration 7 in order to view the assembly.
15. Install carrier assembly (14) into swing drive housing (15).
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Caterpillar Cat 312C Excavator (Prefix CBT) Service Repair Manual (CBT00001 and up).pdf

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