259D Skid Steer Loaders Machine Systems – Piston Pump – Assemble – High Flow

Assembly Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1P-0510     Driver Gp     1    
B     8T-5096     Dial Indicator Group     1    
C     6V-2055     Grease     1    



    Illustration 1g03384548



    Illustration 2g03384371

  1. Install O-ring seal (44) .

  1. Use Tooling (A) to install lip seal (43) in pump housing (6). Install the lip seal until the seal is just below the face of the pump housing. Do not seat the lip seal at this time. Install lip seal (43) and retaining ring (42) into pump housing (6) .

  1. Install retaining ring (42) on top of lip seal (43) .

  1. Use Tooling (A) in order to press retaining ring (42) and lip seal (43) into pump housing (6). Press retaining ring (42) and lip seal (43) until retaining ring (42) is installed in the groove in pump housing (6) .



    Illustration 3g03384370

  1. Lower the temperature of bearing cup (41) .

  1. Install bearing cup (41), bearings (40), and screws (39). Tighten screws (39) to a torque of 5 ± 1 N·m (44.3 ± 8.9 lb in).



    Illustration 4g03384555

  1. Lower temperature of bearing cone (38). Install bearing cone (38) onto shaft assembly (21) .



    Illustration 5g03384588

  1. Install shaft assembly (21) in pump housing (6) .



    Illustration 6g03384680

  1. Do not install shim (24) at this time. Install bearing cone (23) onto shaft (21). Assemble the pump without shim (24) in order to check the preload of bearing cone (23) .



    Illustration 7g03384698

  1. Install head (5) on pump housing (6). Install bolts (4) .



    Illustration 8g03384703



    Illustration 9g03384704

  1. Install Tooling (B) onto pump housing (6). Use the dial indicator to determine the end play of shaft (21). Be sure that you move shaft assembly (21) completely in both directions. Use appropriate tools to move shaft assembly (21) .

  1. Record the measurement.

    Note: The bearing preload should be 0.00 to 0.050mm (0.000 to 0.0020 inch).

  1. The thickness of the required shim should equal the end play measurement plus 0.0508 mm (0.00200 inch). For example, if the end play is 2.1590 mm (0.08500 inch) then the shim thickness should be 2.2098 mm (0.08700 inch).

  1. If necessary, grind the shim to the determined measurement.



    Illustration 10g03384698

  1. Remove bolts (4) and head (5) from pump housing (3) .

  1. Remove the bearing from the shaft.

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