The document provides instructions for disassembling and assembling the travel motor of a 325F excavator. It includes 30 steps for disassembly, removing components like the spring, spool, relief valve, head assembly, housing assembly and more. The 31 steps for assembly include installing lips seals, keys, cam plate, barrel assembly, piston guide and more. Detailed illustrations accompany each step to ensure proper reassembly. Precautions are provided to prevent injury from released springs and to correctly install parts like the cam plate.
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2. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 325F EXCAVATOR NDJ
Configuration: 325F L Excavators NDJ00001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
325F Excavator Machine Systems
Media Number -UENR6794-05 Publication Date -01/09/2018 Date Updated -18/09/2018
i07505849
Travel Motor - Disassemble
SMCS - 4351-015
S/N - NDJ1-UP
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
1P-2420 Transmission Repair Stand 1
FT-0957 Positioning Gp 4
B
- M16x2 Threaded Rod 3
8T-1757 Nut 6
9X-8268 Washer 6
C 421-5662 Lifting Eye Assembly 1
D 421-5663 Lifting Eye Assembly 2
E
1U-9895 Crossblock 1
3H-0465 Push-Puller Plate 2
8T-0298 Bolt 2
Start By:
a. Remove the travel motor.
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3. Illustration 1 g06341880
1. Attach the travel motor to Tooling (A) and (B). The weight of the travel motor is
approximately 70 kg (154 lb).
2. Remove plugs (1) and the O-ring seals.
Illustration 2 g06344110
3. Remove plug (2) and the O-ring seal. Repeat for the opposite side.
Illustration 3 g06341912
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4. 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.
4. Remove plug (2A) and the O-ring seal. Repeat for the opposite side.
Illustration 4 g06341915
5. Remove spring (3).
Illustration 5 g06341917
6. Remove spool (4).
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5. Illustration 6 g06341942
Illustration 7 g06342000
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.
7. Remove bolts (5) and cap (6). Repeat for the opposite side.
8. Remove O-ring seal (10) from cap (6). Remove guide (9), spring (8), and washer (7) from
the head assembly. Repeat for the opposite side.
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6. Illustration 8 g06342005
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.
9. Remove plug (11), O-ring seal (12), spring (13), and ball (14) from cap (6). Repeat for the
other cap.
Illustration 9 g06342009
10. Remove spool (15).
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7. Illustration 10 g06343314
Illustration 11 g06343315
11. Remove relief valve (16). Remove O-ring seal (17) from relief valve (16).
12. Repeat for the opposite side.
Illustration 12 g06343359
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8. 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.
13. Remove the nuts of Tooling (B). Remove bolts (19) from head assembly (18).
Illustration 13 g06343366
14. Use Tooling (C) and a suitable lifting device to remove head assembly (18). The weight of
head assembly (18) is approximately 21 kg (47 lb).
Illustration 14 g06343374
15. Remove control plate (20) and bearing (21) from head assembly (18).
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9. Illustration 15 g06343381
16. Remove pins (22) and springs (23).
17. Remove O-ring seals (24) and (25).
Illustration 16 g06343383
18. Use Tooling (D) and a suitable lifting device to remove housing assembly (26) from
Tooling (A) and place on a suitable bench.
Illustration 17 g06343417
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10. To avoid personal injury, always wear eye and face protection when
using pressurized air.
19. Attach Tooling (E) to housing (26). Use air pressure to unseat brake piston (27). Remove
Tooling (E) and brake piston (27).
Illustration 18 g06343437
20. Remove back up rings (28) and O-ring seals (29) from brake piston (27).
Illustration 19 g06343462
21. Remove brake piston guide (30).
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11. Illustration 20 g06343464
22. Remove O-ring seal (31) from brake piston guide (30).
Illustration 21 g06343466
Illustration 22 g06343469
Note: Note the orientation of friction discs (32) and plates (33) for assembly purposes.
23. Remove friction discs (32) and plates (33).
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12. Illustration 23 g06343638
24. Remove rotating group (34) from housing (26).
Illustration 24 g06343777
25. Remove pistons (35) and retainer (36) from barrel (37).
Illustration 25 g06343783
26. Remove hold down ball (38) and springs (39) from barrel (37).
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13. Illustration 26 g06343786
27. Remove swashplate (40) from housing (26).
Illustration 27 g06343788
Illustration 28 g06343793
28. Remove pistons (41).
29. Remove springs (42) and shaft (43).
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14. Illustration 29 g06343795
30. Remove balls (46).
31. Remove bearing (44) and lip seal (45).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Jun 10 13:06:56 UTC+0800 2020
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15. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 325F EXCAVATOR NDJ
Configuration: 325F L Excavators NDJ00001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
325F Excavator Machine Systems
Media Number -UENR6794-05 Publication Date -01/09/2018 Date Updated -18/09/2018
i01894672
Travel Motor - Assemble
SMCS - 4351-016
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
C 1P-0510 Driver Gp 1
D 5P-3413 Pipe Sealant 1
E 9S-3263 Thread Lock Compound 1
F 1U-6396 O-Ring Assembly Compound 1
G 5P-0960 Molybdenum Grease 1
1. Make sure that all of the components of the travel motor are thoroughly clean and free of
dirt and debris prior to assembly.
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16. Illustration 1 g00510595
2. Install retaining ring (35) in the groove on shaft assembly (34).
3. Raise the temperature of bearing (36). Install bearing (36) on shaft assembly (34). Install the
bearing until the bearing contacts the retaining ring.
4. Install the other retaining ring on the opposite side of bearing (36).
Illustration 2 g00510598
5. Install inner race (37) on the end of shaft assembly (34) until the inner race is seated against
the shoulder on the shaft assembly.
Illustration 3 g00651891
(a) Body
6. Use Tooling (D) to apply a thin coat on Surfaces (Y) of the body of the travel motor.
7. Use Tooling (C) in order to install lip seal (38).
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17. 8. Install lip seal (38) in the body of the travel motor. Install the lip seal so that the sealing lip
is facing in the direction that is shown. Make sure that the lip seal contacts the counterbore
in the body of the travel motor.
Note: Slowly rotate shaft assembly (34) during the installation in order to make sure that the
shaft assembly does not bind in the body of the travel motor.
9. Apply clean hydraulic oil on the lip of lip seal (38).
10. Use a press to install shaft assembly (34) in the body of the travel motor. Slowly rotate the
shaft during the installation in order to make sure that the shaft does not bind. Make sure
that the bearing on the shaft contacts the counterbore in the body of the travel motor.
Illustration 4 g00651960
NOTICE
The locating pin on each key is not centered. In order to prevent
damage to the barrel assembly during assembly of the travel motor, the
keys must be installed as shown. Also, the keys must be installed in the
key's original location in the body of the travel motor.
11. Install the two locating pins and two keys (31) in the body of the travel motor, as shown.
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18. Illustration 5 g00510547
12. Install cam plate (30) in the body of the travel motor in the cam plate's original location.
Make sure that the two pistons and two keys (31) in the body of the travel motor engage
properly with the cam plate.
Illustration 6 g00510504
13. Install springs (29) in the barrel. Install spacer (28) and guide (27) on the barrel.
Illustration 7 g00878253
14. Install piston shoe assemblies (25) in the piston shoe assembly's original bores in shoe
retainer (24).
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19. 15. Apply clean hydraulic oil in the bores of the barrel and on piston shoe assemblies (25).
Install the piston shoe assemblies with the shoe retainer in the piston shoe assembly's
original bore in barrel (26).
NOTICE
Make sure that the cam plate is correctly engaged with the two pistons
in the body of the travel motor prior to installing the barrel assembly.
When the body of the travel motor is tilted to allow the installation of
the barrel assembly, the cam plate can slide off of the two pistons. The
remaining parts of the travel motor can be assembled with the cam
plate in the incorrect position.
Extensive damage will result from the incorrect installation of the cam
plate. Follow the exact installation procedure to prevent damage.
16. Apply clean hydraulic oil on the sliding surfaces of the cam plate, on the piston shoe
assemblies and on the splined shaft of the travel motor.
Illustration 8 g00485953
17. Route a piece of strong string through an opening for the cam plate tension adjusters. Route
the string over the sliding surface of cam plate (30) and through the opposite opening for the
cam plate tension adjusters. Hold the string taut in order to keep cam plate (30) correctly
engaged with keys (31). Keep the string taut and position the body of the travel motor on the
body's side. Do not release the tension on the string at this time. Install barrel assembly (23)
as a unit on the shaft. Pull the string out of the body of the travel motor. It may be necessary
to pull the barrel assembly and the piston shoe assemblies away from the cam plate slightly
in order to release the string.
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20. Illustration 9 g00651967
18. Install O-ring seal (21) and backup ring (22) on piston guide (19), as shown.
Illustration 10 g00510356
19. Place the body of the travel motor in a vertical position.
20. Apply clean hydraulic oil on five friction plates (20) and the four steel plates. Install the
plates in alternating order in the body of the travel motor. Start with a friction plate and end
with a friction plate.
21. Install piston guide (19) in the body of the travel motor until the piston guide contacts the
counterbore in the body of the travel motor.
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21. Illustration 11 g00878297
Note: Make sure that brake piston (14) is thoroughly clean and free of dirt and debris.
22. Install O-ring seal (16). Install backup ring (15).
23. Install O-ring seal (17). Install backup ring (18).
24. Apply a thin coat of hydraulic oil on the surfaces of brake piston (14) which contact the
body of the travel motor. Install brake piston (14) in the body of the travel motor by hand. It
may be necessary to use a soft faced hammer to seat the brake piston correctly.
Illustration 12 g00878299
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22. Illustration 13 g01000124
25. Install washer set (13) in piston (14), as shown.
26. Install O-ring seals (12) in the body of the travel motor, as shown.
Illustration 14 g00510605
27. Install the two pistons and two stoppers (39) in the housing of the travel motor. Tighten the
stoppers to a torque of 140 ± 14 N·m (105 ± 10 lb ft).
Illustration 15 g00510351
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23. 28. Install the O-ring seals on fittings (10). Use Tooling (D) on the threads of fittings (10).
Install the fittings in the head, as shown.
29. Install plugs (11) in the head. Tighten each plug to a torque of 15 ± 2 N·m (11 ± 1 lb ft).
Illustration 16 g00510349
Illustration 17 g00510341
30. Use Tooling (E) on the threads of the check valves. Install the check valves in the head.
31. Install seat (7), poppet (8) and spring (9) in the head at Location (X).
32. Install O-ring seal (6) in the head, as shown.
33. Install bearing (3) in the head until the bearing contacts the counterbore in the cover.
34. Use Tooling (F) on port plate (4). Install the port plate in the port plate's original position on
the motor cover.
35. Use a shim or shims (5) so that the following requirements are met.
Note: During the following checks, turn the travel motor output shaft in a clockwise
direction.
a. The travel motor output shaft does not rotate with an applied torque of 440 N·m
(325 lb ft) or more with the parking brake release port open.
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24. b. The travel motor output shaft rotates with an applied torque of 29 N·m (21 lb ft) or
less when the parking brake release port is pressurized to 780 kPa (115 psi) with both
the inlet port and the outlet port open to the hydraulic oil tank.
Note: It may be necessary to remove head (2) several times in order to determine the correct
thickness of shim or shims (5) that are used to adjust the rolling torque of the travel motor
output shaft.
36. Use Tooling (G) on shims (5). Install the shim or shims on the head. The grease will hold
the shim or shims in place during the installation of the head. Install the head on the body of
the travel motor.
Illustration 18 g00510326
37. Place head (2) in the head's original position on the travel motor. Install socket head bolts
(1) that secure the head. Tighten the socket head bolts to a torque of 175 ± 18 N·m
(130 ± 13 lb ft).
NOTICE
To prevent possible damage to the travel motor, fill the unit with oil at
least to the fill port before operating the machine. Refer to the
Operation and Maintenance Manual for the correct oil specification.
End By:
a. Install the travel motor. Refer to Disassembly and Assembly, "Travel Motor - Install" in this
manual.
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Jun 10 13:07:52 UTC+0800 2020
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25. Thank you very much for
your reading. Please Click
Here. Then Get COMPLETE
MANUAL. NO WAITING
NOTE:
If there is no response to
click on the link above,
please download the PDF
document first and then
click on it.
26. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 325F EXCAVATOR NDJ
Configuration: 325F L Excavators NDJ00001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
325F Excavator Machine Systems
Media Number -UENR6794-05 Publication Date -01/09/2018 Date Updated -18/09/2018
i07505850
Travel Motor - Assemble
SMCS - 4351-016
S/N - NDJ1-UP
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
1P-2420 Transmission Repair Stand 1
FT-0957 Positioning Gp 4
B
- M16x2 Threaded Rod 3
8T-1757 Nut 6
9X-8268 Washer 6
C 421-5662 Lifting Eye Assembly 1
D 421-5663 Lifting Eye Assembly 2
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27. Illustration 1 g06343795
1. Install lip seal (45) and bearing (44).
2. Install balls (46).
Illustration 2 g06343793
Illustration 3 g06343788
3. Install shaft (43) and springs (42).
4. Install pistons (41).
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28. Illustration 4 g06343786
5. Install swashplate (40) into housing (26).
Illustration 5 g06343783
6. Install springs (39) and hold down ball (38) into barrel (37).
Illustration 6 g06343777
7. Install retainer (36) and piston (35) into barrel (37).
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