302.5C Mini Hydraulic Excavator Machine Systems Caterpillar


Main Hydraulic Pump - Assemble

Usage:

302.5C GBB

Assembly Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1P-1861     Retaining Ring Pliers     1    

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




    Illustration 1g01171975

  1. Raise the temperature of bearing (30) and lower the temperature of shaft (29) in order to assemble bearing (30) to shaft (29) .



    Illustration 2g01171931

  1. Install slug (31), slug (32), balls (33), and seal (34) .



    Illustration 3g01171929

  1. Install shaft assembly (29) .

  1. Use Tooling (A) to install retaining ring (28) .



    Illustration 4g01171928

  1. Install swashplate (27) and spring retainer (26) .



    Illustration 5g01171951



    Illustration 6g01171927

    ------ WARNING! ------

    Personal injury can result from being struck by parts propelled by a released spring force.

    Make sure to wear all necessary protective equipment.

    Follow the recommended procedure and use all recommended tooling to release the spring force.

    ----------------------

  1. Install retainer (23) and spring (24) into barrel assembly (17) .

  1. Use a suitable press in order to compress spring (24) .

  1. Use Tooling (A) to install retaining ring (25) .



    Illustration 7g01171926

  1. Install pins (22) .



    Illustration 8g01171925

  1. Install bearing (21) .



    Illustration 9g01171924

  1. Install plate (20) and pistons (19) to barrel assembly (17) .



    Illustration 10g01171923

  1. Install barrel assembly (17) and O-ring seal (18) .



    Illustration 11g01171922

  1. Install plug (15), port plate (14), spring (13), and gasket (12) onto housing (16) .



    Illustration 12g01171921

  1. Install plug (11), O-ring seal (10), and bearing (9) onto cover (6) .



    Illustration 13g01171920

    ------ WARNING! ------

    Personal injury can result from being struck by parts propelled by a released spring force.

    Make sure to wear all necessary protective equipment.

    Follow the recommended procedure and use all recommended tooling to release the spring force.

    ----------------------

  1. Install cover (6) and bolts (7) .

  1. Install plug (8), O-ring seals (5), and coupling (4) onto cover (6) .



    Illustration 14g01171910

  1. Install gear pump (2) onto piston pump (3) and install bolts (1) .

End By: Install main hydraulic pump and gear pump. Refer to Disassembly and Assembly, "Main Hydraulic Pump and Gear Pump (Pilot) - Install".

Caterpillar Information System:

302.5C Mini Hydraulic Excavator Machine Systems Main Hydraulic Pump - Disassemble
302.5C Mini Hydraulic Excavator Machine Systems Gear Pump (Pilot) - Assemble
302.5C Mini Hydraulic Excavator Machine Systems Gear Pump (Pilot) - Disassemble
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