320D2 GC Excavator Machine Systems Travel Motor - Assemble Caterpillar


Travel Motor - Assemble
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1.1. Assembly Procedure

Assembly Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
1P-0510  Driver Gp 

  1. Make sure that all of the components of the travel motor are thoroughly clean and free of dirt and debris prior to assembly.


    Illustration 1g00510595

  2. Install retaining ring (35) in the groove on shaft (34).

  3. Install bearing (36) on shaft (34) with a press. Install the bearing until the bearing contacts the retaining ring.

  4. Install the other retaining ring on the opposite side of bearing (36).


    Illustration 2g00510598

  5. Install inner race (37) on the end of shaft (34) until the inner race is seated against the shoulder on the shaft.


    Illustration 3g00651891
    (a) Body

  6. Apply a thin coat of 5P-3413 Pipe Sealant on Surfaces (Y) of the body of the travel motor.

  7. Use Tooling (A) in order to install lip seal (38).

  8. Install lip type 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 4g00651960


    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.


    Illustration 5g00510547

  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 6g00510504

  13. Install nine springs (29) in the barrel. Install spacer (28) and guide (27) on the barrel.


    Illustration 7g00878253

  14. Install piston shoe assemblies (25) in the piston shoe assembly's original bores in shoe retainer (24).

  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 8g00485953

  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.


    Illustration 9g00651967

  18. Install O-ring seal (21) and backup ring (22) on piston guide (19), as shown.


    Illustration 10g00510356

  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.


    Illustration 11g00878297

    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 piston (14) which contact the body of the travel motor. Install piston (14) in the body of the travel motor by hand. It may be necessary to use a soft faced hammer to seat the piston correctly.


    Illustration 12g00878299


    Illustration 13g00878239

  25. Install washer set (12) in piston (14), as shown.

  26. Install O-ring seals (13) in the body of the travel motor, as shown.


    Illustration 14g00510605

  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 15g00510351

  28. Install the O-ring seals on fittings (10). Apply 5P-3413 Pipe Sealant 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 16g00510349


    Illustration 17g00510341

  30. Apply a thin coat of 9S-3263 Thread Lock Compound on the threads of the two 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. Apply 1U-6396 O-Ring Assembly Compound 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.

    1. 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.

    2. 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. Apply a thin layer of 5P-0960 Molybdenum Grease on shim or 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 18g00510326

  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:

  1. Install the travel motor.

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