PM820, PM822, and PM825 Cold Planer Machine Systems Caterpillar


Piston Pump (Hydraulic Fan) - Remove and Install

Usage:

PM825 3C6

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
Loctite ® Moly-Paste™ 

Start By:

  1. Remove the fuel priming pump and primary filter.

  2. Remove the secondary fuel filter base.

  3. Remove the fumes disposal filters.


    Illustration 1g06265895

  1. Disconnect harness assemblies (3) and position out of the way. 5Remove clamps (1) and clamp (4). Remove tube assembly (2).


    Illustration 2g06265912

  2. Engage lever (5) and rotate seat group (6) out of the way.


    Illustration 3g06265915

  3. Open access door (7).


    Illustration 4g06265925

  4. Remove two bolts (8) and remove platform (9).


    Illustration 5g06265931

  5. Remove two bolts (10) and two clamps (11). Remove four cable straps (12).

  6. Disconnect hose assembly (13) , hose assembly (14), hose assembly (15) , hose assembly (16), and the O-ring seals. Position the hose assemblies out of the way.


    Illustration 6g06265957

  7. Remove four cable straps (21).

  8. Disconnect harness assembly (17), harness assembly (18), harness assembly (19), harness assembly (20), harness assembly (22), and harness assembly (23). Position the harness assemblies out of the way.


    Illustration 7g06265967

  9. Disconnect hose assembly (24), hose assembly (25), hose assembly (26), hose assembly (27), hose assembly (28), hose assembly (29), and remove the O-ring seals.


    Illustration 8g06265978

  10. Disconnect harness assembly (30), harness assembly (31), harness assembly (32), harness assembly (33), and remove the O-ring seals. Position the hose assemblies out of the way.


    Illustration 9g06266009

  11. Remove bolts (34). Disconnect hose assembly (35) and remove the O-ring seal.


    Illustration 10g06266013
    View from the bottom of the piston pump (fan).

  12. Remove bolts (36). Disconnect hose assembly (37) and remove the O-ring seal.


    Illustration 11g06266073

  13. Attach suitable lifting device to piston pump (propel) (38) and piston pump (fan) (39) as an assembly. The combined weight of piston pump (propel) (38) and piston pump (fan) (39) is approximately 103 kg (227 lb).


    Illustration 12g06266116

  14. Remove two bolts (40).


    Illustration 13g06266120

  15. Pull piston pump (propel) (38) and piston pump (fan) (39) away from the gearbox to free the spline. Remove O-ring seal (41) and discard. Remove piston pump (propel) (38) and piston pump (fan) (39) as an assembly.


    Illustration 14g06266249

  16. Remove two bolts (42).


    Illustration 15g06266126

  17. Remove piston pump (fan) (39) from piston pump (propel) (38).

Installation Procedure

  1. Install piston pump (fan) (39) in the reverse order of removal.

    1. Tighten bolts (10) to a torque of 15 ± 3 N·m (133 ± 27 lb in).

    2. Apply Tooling (A) to the splines of piston pump (propel) (39) prior to installation.

    3. Apply Tooling (A) to the splines of piston pump (propel) (38) prior to installation.

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