312B Excavator Machine Systems Caterpillar

Installation Procedure

1. Make sure that the mating surfaces of the travel motor and the travel brake valve are thoroughly clean.

2. Check the condition of the three O-ring seals that are used between the travel motor and the travel brake valve. If the O-ring seals are damaged, use new parts for replacement.

3. Install the three O-ring seals in the travel motor.

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Illustration 1	g00483963

4. Place travel brake valve (3) in position on the travel motor. Install six bolts (4). Tighten the six bolts to a torque of 80 ± 8 N·m (60 ± 6 lb ft).

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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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

5. Check the condition of the O-ring seals that are used in the ends of two hose assemblies (5). If the O-ring seals are damaged, use new parts for replacement.

6. Connect two hose assemblies (5) to the travel brake valve. Tighten the hose assemblies to a torque of 80 ± 7 N·m (60 ± 5 lb ft).

Note: Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the proper filling procedure and the proper levels for the hydraulic system.

7. Fill the hydraulic oil tank with hydraulic oil to the correct level.

8. Start the machine and check for leaks. Check the operation of the travel motors.

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Illustration 2	g00483962

9. Install cover (2). Install the washers and four bolts (1). Tighten the four bolts to a torque of 130 ± 10 N·m (95 ± 7 lb ft).