320D2 GC Excavator Machine Systems Travel Motor - Disassemble Caterpillar


Travel Motor - Disassemble
`
1.1. Disassembly Procedure

Disassembly Procedure

Start By:

  1. Remove the travel motor.


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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.

Dispose of all fluids according to local regulations and mandates.


  1. Thoroughly clean the outside of the travel motor prior to disassembly.

  2. Fasten the travel motor to a suitable holding fixture in a vertical position. The weight of the travel motor is 60 kg (132 lb).

  3. Put an alignment mark across the head and the body of the travel motor for assembly purposes. The head must be reinstalled in the head's original position on the body of the travel motor.


    Illustration 1g00510326

    Note: During the removal of head (2) from the body of the travel motor, be careful not to scratch or damage the mating surfaces of the components.

  4. Remove socket head bolts (1).

  5. Remove head (2) from the body of the travel motor.


    Illustration 2g00510341


    Illustration 3g00510349

  6. Turn over head (2).

  7. Remove O-ring seal (6), shims (5), port plate (4), and bearing (3) from the head.

  8. Remove the two check valve assemblies from the head.

    Note: There is a retainer under spring (9). This retainer is a press fit in head (2). Do not remove the retainer.

  9. Insert a dowel rod with a small diameter into hole (X). Tap the dowel rod with a plastic hammer in order to remove spring (9), poppet (8) and seat (7) from the head.


    Illustration 4g00510351

  10. Remove three fittings (10) and plugs (11) from the head. Remove the O-ring seal from each fitting.


    Illustration 5g00510352

  11. Remove three O-ring seals (12) and washer set (13) from the body of the travel motor.

  12. Place a shop towel over brake piston (14). Retain brake piston (14) by hand, and apply approximately 525 kPa (75 psi) of shop air pressure to brake release port (Y). Make sure that the shop air pressure is free of water. Brake piston (14) will move up the piston guide, and out of the piston guide. Remove brake piston (14) from the body of the travel motor.


    Illustration 6g00510353

  13. Remove O-ring seal (15) from the brake piston. Remove backup ring (16) from the brake piston.

  14. Remove O-ring seal (17) from the brake piston. Remove backup ring (18) from the brake piston.


    Illustration 7g00510356

  15. Remove piston guide (19), five friction plates (20) and the four steel plates from the body of the travel motor.


    Illustration 8g00510359

  16. Remove O-ring seal (21) from the piston guide. Remove backup ring (22) from the piston guide.


    Illustration 9g00510365

    Note: Do not allow the components of barrel assembly (23) to come apart during the removal from the travel motor. All of the components in the barrel assembly must be reinstalled in the component's original location.

  17. Use two large screwdrivers, as shown. Slowly remove barrel assembly (23) from the body of the travel motor. Do not allow the components to fall apart.


    Illustration 10g00510502

    Note: Shoe retainer (24) and piston shoe assemblies (25) are not serviced separately. Prior to the removal of the shoe retainer and the piston shoe assemblies from barrel (26), put identification marks on piston shoe assemblies (25) for assembly purposes. Identification marks are used to identify the piston shoe assembly's location in shoe retainer (24) and barrel (26). The piston shoe assemblies must be reinstalled in the piston shoe assembly's original bores in the shoe retainer and the barrel.

  18. Remove shoe retainer (24) and piston shoe assemblies (25) from barrel (26). Separate the piston shoe assemblies from the shoe retainer.


    Illustration 11g00510504

  19. Remove guide (27), spacer (28) and springs (29) from the barrel.


    Illustration 12g00510547

  20. Remove cam plate (30) from the body of the travel motor.


    Illustration 13g00510550

  21. Remove two keys (31) and the two locating pins (not shown) from the body of the travel motor.


    Illustration 14g00510551

  22. Remove O-ring seal (33) from the body of the travel motor.

  23. Use a soft faced hammer to remove shaft assembly (34) from the body of the travel motor. Remove the shaft assembly in the direction that is indicated by the arrow. Refer to Illustration 14.


    Illustration 15g00510595

  24. Remove retaining rings (35) from each side of bearing (36). Push shaft (34) out of bearing (36) with a press.


    Illustration 16g00510598

  25. Remove inner race (37) from shaft (34).


    Illustration 17g00510599

  26. Remove lip seal (38) from the body of the travel motor.


    Illustration 18g00510605

  27. Remove two stoppers (39) and the two pistons from the body of the travel motor.

Information System:

320D2 GC Excavator Machine Systems Travel Motor - Remove and Install
320D2 GC Excavator Machine Systems Counterbalance Valve (Travel) - Assemble
320D2 GC Excavator Machine Systems Counterbalance Valve (Travel) - Disassemble
320D2 GC Excavator Machine Systems Counterbalance Valve (Travel) - Remove and Install
320D2 GC Excavator Machine Systems Sprocket - Remove and Install
320D2 GC Excavator Machine Systems Hydraulic Track Adjusters - Assemble
320D2 GC Excavator Machine Systems Hydraulic Track Adjusters - Disassemble
An Improved Foot Valve Assembly and Valve Kit for the Fuel Transfer Pump is Now Available on Certain Excavators, Front Shovels, and Mobile Hydraulic Power Units {1256}
320D2 GC Excavator Machine Systems Recoil Spring - Assemble
320D2 GC Excavator Machine Systems Recoil Spring - Disassemble
320D2 GC Excavator Machine Systems Front Idler and Recoil Spring - Remove and Install
320D2 GC Excavator Machine Systems Track - Connect
320D2 GC Excavator Machine Systems Travel Motor - Assemble
Information on A/D/G Coatings for Bolts, Spacers, and Washers {7000, 7553, 7553}
320D2 GC Excavator Machine Systems Final Drive - Remove and Install
320D2 GC Excavator Machine Systems Final Drive - Disassemble
320D2 GC Excavator Machine Systems Final Drive - Assemble
320D2 GC Excavator Machine Systems Swivel - Remove and Install
Installation of the <NOBR>488-1414</NOBR> Coupler Control Ar on Certain Hydraulic Excavators {1408, 1901, 5057, 6129, 7405, 7557}
Installation Procedure for the <NOBR>491-0551</NOBR> Front Lines Gp On Certain Hydraulic Excavators {5057}
Installation of the 494-4245 Chassis Wiring Gp On Certain Hydraulic Excavators {1408}
320D2 GC Excavator Machine Systems Swivel - Disassemble
Installation of the <NOBR>488-1415</NOBR> Coupler Control Ar on Certain Hydraulic Excavators {1408, 1901, 5057, 5639, 6129, 7405, 7451, 7557}
Installation Procedure for the <NOBR>492-2301</NOBR> Front Lines Gp On Certain Hydraulic Excavators {5057}