308C CR Excavator Hydraulic System – Main Hydraulic Pump – Install

Installation Procedure

Table 1
Required Tools    
Tool     Part Number     Description     Qty    
A     4C-8359     Eyebolt     1    
189-0408 Shackle     1    


Keep all parts clean from contaminants.

Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.

To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.

Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.


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.

    Illustration 1 g00896189

  1. Install Tooling (A). Use a suitable lifting device. The weight of the main hydraulic pump is approximately 70 kg (155 lb).
  1. Position main hydraulic pump (12) .
  1. Install bolts (11) .

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  1. Install cover (10) .

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  1. Install cover (9) .

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  1. Install cover (8) .

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  1. Install panel (7) .

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  1. Connect oil tube (6) .

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  1. Connect hose assemblies (2) .

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  1. Position pilot oil filter base (3). Install bolts (5) .
  1. Connect hose assemblies (4) on oil filter base (3).

    Illustration 9 g00890740

    Right rear of machine

  1. Install access cover (1) .
  1. Fill the hydraulic tank. The capacity of the hydraulic tank is approximately 55 L (14.5 US gal). Refer to Operation and Maintenance Manual, SEBU7613, “Capacities (Refill)”.

End By:
Remove the hood. Refer to Disassembly and Assembly Manual, “Hood – Remove and Install”.