259D Skid Steer Loaders Machine Systems – Piston Pump – Remove and Install – High Flow

Removal Procedure

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

Personal injury can result from hydraulic oil pressure and hot oil.

Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.

Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.


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  1. Raise the lift arms and position the cylinder lock (1) .

  1. Tilt the cab.

  1. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change".

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  1. Disconnect hose (2) and hose assemblies (3) .

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  1. Disconnect hose assembly (4) .

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  1. Remove bolts (5). Use two people to remove piston pump (6). The weight of piston pump (6) is approximately 27 kg (60 lb).

Installation Procedure

  1. Install piston pump (6) in the reverse order of removal.

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