BEARING 4856996 - Caterpillar

Removal procedure
Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed.Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death.Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.
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.
Illustration 1 g06103036
Fully extend the cylinder. Remove bolt (1) and pin assembly (2).
Retract the cylinder.
Illustration 2 g06102088
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "System Pressure - Release" for more information.
Disconnect hose assemblies (3).
Illustration 3 g06103087
Attach a suitable lifting device to cylinder (4). The weight of cylinder (4) is approximately 50 kg (110 lb).
Remove bolt (5), pin assembly (6), and shims (7).
Remove cylinder (4).Installation Procedure
Install cylinder (4) in the reverse order of removal.Disassembly and Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 127-4904 Repair Stand 1
B - Loctite C5A (Copper Anti-Seize Loctite) 1
Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed.Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death.Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.
Illustration 4 g06103061
Lubricate the threads of piston assembly (9) with a minimal amount of the lubricant that is being sealed. Tighten piston assembly (9) to a torque of 980 N.m (722 lb ft).
Tighten valve group (8) to a torque of 115 N.m (85 lb ft).
Illustration 5 g06103063
Apply Tooling (B) to the threads of bolts (10) before assembly. Tighten bolts (10) as per sequence shown in Illustration 5. Tighten bolts (10) to a torque of 75 N.m (55 lb ft).