BOOM & BEARING AS 2255901 - Caterpillar

Removal Procedure
Start By:
Remove the rear chassis support. Refer to Disassembly and Assembly, "Rear Chassis Support - Remove".
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.
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, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: Put identification marks on all hoses, on all hose assemblies, on all harness assemblies, and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.
Illustration 1 g01382078
Disconnect hose assemblies (1) and (3). Remove tube assembly (2) .
Illustration 2 g01382083
Attach a suitable lifting device to piston pump (5). The weight of piston pump (5) is approximately 52 kg (115 lb).
Remove bolts (4) in order to remove piston pump (5) from the machine.
Illustration 3 g01382119
Remove O-ring seal (6) from piston pump (5) .