336D 2L and 340D 2L Excavators Machine Systems Gear Pump (Pilot) - Remove and Install Caterpillar


Gear Pump (Pilot) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.


NOTICE

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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.

Dispose of all fluids according to local regulations and mandates.


------ 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.


  1. Drain the hydraulic fluid into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Refill Capacities".


    Illustration 1g06033894

  2. Open door (1).


    Illustration 2g01211317

  3. Disconnect hose assembly (2) and remove fitting (5).

  4. Remove bolts (3) and pilot gear pump (4).

Installation Procedure

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 3g01211317

  1. Position pilot gear pump (4) and install bolts (3).

  2. Install fitting (5) and connect hose assembly (2).


    Illustration 4g06033894

  3. Close door (1).

  4. Fill the hydraulic system with oil. Refer to Operation and Maintenance Manual, "Refill Capacities".

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