PUMP GP-PISTON 2959655 - Caterpillar

Removal Procedure
Start By:
Remove the cab. Refer to Disassembly and Assembly, "Cab - Remove" for the machine that is being serviced.
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.
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 attachments have been lowered, 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.
Note: Thoroughly clean the outside of the parking brake and the adjacent area of the output transfer gear case prior to disassembly. Put identification marks on all lines, on all hoses, on all wires and on all tubes for installation purposes. Plug all lines, all hoses and all tubes. This will help to prevent fluid loss and this will help to keep contaminants from entering the system.Note: Block all four wheels prior to performing work on the parking brake.
Illustration 1 g00627769
Illustration 2 g00627772Note: The parking brake (1) is located on the output transfer gear case.
Disconnect hose assembly (2) from parking brake (1).
Illustration 3 g00627773
Remove three bolts (3) from the storage location in plate (4).
Illustration 4 g00627775
Install three bolts (3) in plate (4), as shown.
Tighten bolts (3) evenly until solid resistance is felt in order to release the parking brake manually.
Illustration 5 g00627776
Illustration 6 g00627777
Disconnect two hose assemblies (5) and place the hose assemblies aside.
Remove two bolts (7) and place bracket assembly (6) aside.
Illustration 7 g00627779
Disconnect hose assembly (8) and place the hose assembly aside.
Illustration 8 g00627781
Remove bolt (9) in order to provide clearance for removal of parking brake (1).
Illustration 9 g00627771
Attach a suitable hoist and a suitable lifting sling to parking brake (1), as shown.
Remove nine bolts (10).
Illustration 10 g00627812
Remove bolt (11) from the output transfer gear case in order to provide clearance.
Use the hoist in order to remove parking brake (1). The weight of parking brake (1) is 59 kg (130 lb).