308C CR Excavator Hydraulic System – Gear Pump (Pilot) – Assemble

Assembly Procedure

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


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.

Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be deposited on the parts which may cause trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.

Note: Check the O-ring seals, the gaskets, and the seals for wear or for damage. Replace the components, if necessary.

    Illustration 1 g00877739

  1. Use Tooling (A) to install bushings (12) .

    Illustration 2 g00877919

  1. Install idler gear (11) and drive gear (10) in housing (9) .

    Illustration 3 g00877737

  1. Install thrust plate (7) and backup ring (8) in housing (9). Install ring seal (5) and O-ring seal (4) in end frame (6).

    Illustration 4 g00877736

  1. Position the end frame on the housing and install bolts (3). Tighten the bolts to a torque of 32 ± 4 N·m (25 ± 3 lb ft).

    Illustration 5 g00877735

  1. Install O-ring seal (2) .

    Illustration 6 g00877733

  1. Install fittings (1) on the gear pump.