PULLEY 4M9123 - Caterpillar

Start By:
Remove the bucket. Refer to Disassembly and Assembly, "Bucket - Remove".
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.
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.
Illustration 1 g01176078
Start the machine and install Tooling (A) in order to support the boom, as shown. The stick must be above the ground slightly when the boom is resting on Tooling (A) in order to prevent pressure on the pin assembly.
Stop the engine.
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".Note: Put identification marks on all hose assemblies, fittings and ports so that all the components can be reassembled in the original configuration. Plug all of the hose assemblies and cap all of the fittings. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
Illustration 2 g01176079
Attach a suitable lifting device to stick cylinder (1). The weight of stick cylinder (1) is approximately 193 kg (425 lb).
Put a slight lifting tension on stick cylinder (1). Remove bolt (2) and pin assembly (3). Position a suitable block under stick cylinder (1) and lower stick cylinder (1) .
Illustration 3 g01176081
Disconnect hose assemblies (4). Repeat this step for the opposite side.
Illustration 4 g01176082
Illustration 5 g01176083
Reinstall pin assembly (3) and bolt (2) onto stick (5) and attach a suitable lifting device, as shown. Attach Tooling (B) and a suitable lifting device to the opposite end of stick (5), as shown. The weight of stick (5) is approximately 1451 kg (3200 lb). Put a slight tension on stick (5) .
Illustration 6 g01176084
Illustration 7 g01176085
Remove bolt (6) .
Attach Tooling (C) and a suitable lifting device to pin assembly (7). The weight of Tooling (C) and pin (7) is approximately 152 kg (335 lb). Remove pin assembly (7) .
Remove stick (5) .