Service Repair Manual for 325C FM EXCAVATOR

Service Repair Manual
Models
325C FM EXCAVATOR

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Product: EXCAVATOR
Model: 325C FM EXCAVATOR Y4P
Configuration: 325C FOREST SWING MACHINES Y4P00001-UP (MACHINE) POWERED BY 3126B Engine
Disassembly and Assembly
325C Forest Machines Machine Systems
Media Number -RENR5477-00 Publication Date -01/06/2004 Date Updated -11/06/2004
i02012672
Final Drive - Disassemble
SMCS - 4050-015
S/N - S3M1-UP
S/N - Y4P1-UP
Disassembly Procedure
Start By:
A. Remove the final drive. Refer to Disassembly and Assembly, "Final Drive - Remove".
Table 1
Required Tools
Tool Part Number Part Description Qty
A
3H-0468 Puller Plate 2
5F-7366 Forcing Screw 1
8B-7548 Push-Puller Tool Gp 1
8T-0070 Bolt 2
8T-3282 Hard Washer 2
1P-0520 Driver Gp 1
B 1U-8223 Lifting Sling 2
C 1P-2321 Combination Puller 1
D 4C-8358 Eyebolt 3
E 156-7100 Slide Hammer Puller Gp 1
1/16325C FOREST SWING MACHINES Y4P00001-UP (MACHINE) POWERED BY 31...
2020/6/28https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

M5x0.8x1.5 Bolt 1
F 10mm Drill 1
G 1P-7407 Eyebolt 2
H 199-6557 Spanner Socket 1
I 4C-8359 Eyebolt 2
J 127-8458 Final Drive Bench Ar 1
K 127-8468 Reaction Bar As 1
L
3S-6224 Electric Hydraulic Pump Gp 1
8T-0820 Hydraulic Pressure Gauge 1
3B-7722 Pipe Bushing 2
1P-2376 Quick Connect Coupler 2
1P-2377 Dust Plug 2
8F-0024 Hose As 2
M 128-4075 Shaft As 1
N 194-3885 Adapter Plate 1
Q 4C-8359 Eyebolt 2
R 1U-8758 Retaining Ring Pliers 1
S 1P-1863 Retaining Ring Pliers 1
T 1P-1859 Retaining Ring Pliers 1

Illustration 1 g00903052
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.
1. Install Tooling (A). Apply slight pressure to plate (1). Use Tooling (R) to remove retaining
ring (2) .
2. Carefully remove Tooling (A) .
3. Remove plate (1) .
4. Remove O-ring seal (3) .
5. Remove springs (4) .
6. Remove piston (5) .

a. Remove piston seals (6) from piston (5) .
7. Remove coupler (7) .
8. Remove brake discs (8) .

9. Remove bottom brake plate (9) .
10. Turn over the final drive.
11. Attach Tooling (B). Use a suitable lifting device. Remove sprocket (10). The weight of
sprocket (10) is approximately 48 kg (106 lb).
12. Remove cover (11).
13. Remove sun gear (12). Remove planetary gear set (13). Use Tooling (S) to remove retaining
rings (14) .

Typical example
a. Install Tooling (C). Remove gears (15) .
b. Cut a notch in the bearing cup. Remove one row of bearing rollers through the notch.
After the bearing rollers are out, the remaining parts will drop out. Remove the
retaining ring from the bearing cup.

14. Remove planetary gear set (16) .
a. Use Tooling (T) to remove retaining rings (17) .
Typical example
b. Install Tooling (C). Remove gear (18) .

15. Remove bolts (19) .
16. Use Tooling (T) to remove retainer ring (19A) .
17. Install Tooling (D). Use a suitable lifting device. The weight of planetary gear set (20) is
approximately 36 kg (80 lb).

a. Install Tooling (C). Remove gear (21) .
b. Use Tooling (R) to remove retaining ring (22) .
18. Rotate ring (23) for one notch.

19. Remove ring (23) .
20. Install Tooling (E) into dowel pin (24). Remove dowel pin (24) from locknut (25) .
Note: The threads for the nut will be damaged from the dowel pins.
21. Use Tooling (F) to drill the holes in order to remove the damaged threads.
127-8458 Final Drive Disassembly and Assembly Bench
Note: The following procedure is for the 127-8458 Final Drive Disassembly and Assembly
Bench .
Note: Refer to the Tool Operating Manual, NEHS0673 for further procedures concerning 127-
8458 Bench .
1. Remove the hoist from Tooling (Q) and attach four chains and a hoist to the upper half of
Tooling (J) .
10/16325C FOREST SWING MACHINES Y4P00001-UP (MACHINE) POWERED BY ...

2. Remove the upper half of Tooling (J). The weight of the upper half is approximately 816 kg
(1800 lb).
3. Install Tooling (N) onto the lower half of Tooling (J). The weight of Tooling (N) is
approximately 100 kg (221 lb).
4. Fasten Tooling (Q) and a hoist to the final drive. Keep the hoist attached.
5. Fasten the final drive onto the lower half of Tooling (N).
6. Install bolts (27) in the final drive through adapter ring (26) .

7. Fasten Tooling (G) and a hoist to Tooling (H) .
8. Lower Tooling (H) into the final drive. Make sure that the notches in nut (25) are aligned
with the keys on Tooling (H). The weight of Tooling (H) is approximately 45 kg (100 lb).
9. Remove Tooling (Q) and the hoist.
10. Place Tooling (K) onto Tooling (H) .
11. Fasten a hoist to the upper half of Tooling (J) and install the upper half of Tooling (J) to the
lower half of Tooling (J). Pin the two halves together.

12. Attach Tooling (L) to the pressure reducing valve manifold, as shown.
13. Set the torque level for the bench to 2000 psi (14500 lb ft). Do not exceed this pressure.
Refer to the Tool Operating Manual, NEHS0673 for setting the torque level.
14. Place Tooling (M) through the bench and into Tooling (K) .
15. Remove locknut (25). The breakaway torque will vary. The nut will loosen usually at 1400
psi (10750 lb ft).
16. Fasten a hoist to the upper half of Tooling (J) .
17. Remove the upper half of Tooling (J) .
Disassembly Procedure for the Main Housing and the Motor
Housing

1. Fasten Tooling (Q) and a hoist to main housing (29), as shown.
2. Separate the main housing (29) from the motor housing (30). The weight of the main
housing is approximately 123 kg (270 lb).
Note: Two outer races and one roller bearing will be removed with the main housing. The
other roller bearing and the two Duo-cone seal kits will remain with the motor housing.
3. Disassemble motor housing (30), as follows:
a. Use two screwdrivers and remove bearing (31) from the motor housing.
b. Remove the Duo-cone seal kit (32) from the motor housing.

c. Remove the two backup rings and O-ring seal (33) from the motor housing.
4. Disassemble the main housing (29), as follows:
a. Remove bearing (34) from the main housing (29) .

b. Turn main housing (29) over 180 degrees, as shown.
c. Remove seal (35) .
d. Remove bearing (36) .
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sun Jun 28 10:51:50 UTC+0800 2020

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Product: EXCAVATOR
Model: 325C FM EXCAVATOR Y4P
Configuration: 325C FOREST SWING MACHINES Y4P00001-UP (MACHINE) POWERED BY 3126B Engine
Disassembly and Assembly
325C Forest Machines Machine Systems
Media Number -RENR5477-00 Publication Date -01/06/2004 Date Updated -11/06/2004
i02013082
Final Drive - Assemble
SMCS - 4050-016
S/N - S3M1-UP
S/N - Y4P1-UP
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
3H-0468 Puller Plate 2
5F-7366 Forcing Screw 1
8B-7548 Push-Puller Tool Gp 1
8T-0070 Bolt 2
8T-3282 Hard Washer 2
1P-0520 Driver Gp 1
B 1U-8223 Lifting Sling 2
D 4C-8358 Eyebolt 3
G 1P-7407 Eyebolt 2
H 199-6557 Spanner Wrench As 1
J 127-8458 Final Drive Bench Ar 1
K 127-8468 Reaction Bar As 1

L
3S-6224 Electric Hydraulic Pump Gp 1
8T-0820 Hydraulic Pressure Gauge 1
3B-7722 Pipe Bushing 2
1P-2376 Quick Connect Coupler 2
1P-2377 Plug As 2
8F-0024 Hose As 2
M 128-4075 Shaft As 1
N 154-9315 Thread File 1
P 126-3994 Duo-Cone Seal Installer As 1
Q 4C-8359 Eyebolt 2
R 1U-8758 Retaining Ring Pliers 1
S 1P-1863 Retaining Ring Pliers 1
T 1P-1859 Retaining Ring Pliers 1
Assembly Procedure for the Main Housing
1. Assemble main housing (3), as follows:
a. Install bearing race (2) .
b. Install seal (1) .

c. Turn main housing (3) over 180 degrees, as shown.
d. Install bearing (4) .
2. Assemble motor housing (6), as follows:
a. Install the two backup rings and O-ring seal (7) in the motor housing.

b. Install bearing (8) .
c. Use Tooling (P) to install Duo-cone seal kit (9) .
3. Place main housing (3) on motor housing (6) .
4. Remove Tooling (Q) and the hoist.

5. Use Tooling (N) to clean the threads that are on locknut (10) .
6. Install locknut (10) .
7. Fasten Tooling (G) and a hoist to Tooling (H) .
8. Lower Tooling (H) into the final drive. Make sure that the notches in locknut (10) are
aligned with the keys on Tooling (H). Tooling (H) weighs approximately 45 kg (100 lb).
9. Place Tooling (K) onto Tooling (H) .
10. Fasten a hoist to the upper half of Tooling (J) and install the upper half of Tooling (J) to the
lower half of Tooling (J). Pin the two halves together.

11. Attach Tooling (L) to the pressure reducing valve manifold, as shown.
12. Set the torque level for the bench to 4000 N·m (2950 lb ft). Do not exceed this pressure.
Refer to the Tool Operating Manual, NEHS0673 for setting the torque level.
13. Place Tooling (M) through the bench and into Tooling (K) .

14. Tighten locknut (10) to a torque of 4000 N·m (2950 lb ft).
15. Fasten a hoist to the upper half of Tooling (J) .
16. Remove the upper half of Tooling (J) .
17. Install dowel pin (11) into locknut (10) .
Note: Do not reuse the old holes for the dowel pins.

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18. Rotate ring (12) for one notch until the ring locks in place.
19. Use Tooling (R) to install retaining ring (15).
20. Install gears (14) .

21. Use Tooling (T) to install retaining ring (13) .
22. Install Tooling (D) and a suitable lifting device to planetary gear (16). The weight of
planetary gear set (16) is approximately 36 kg (80 lb). Position the planetary gear set into
the housing.
23. Install bolts (17) .

24. Install gears (18) .
25. Install planetary gear set (19) .
a. Use Tooling (T) to install retaining ring (20) .

Service Repair Manual for 325C FM EXCAVATOR

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