GASKET 7H9984 - Caterpillar

Disassembly Procedure
Table 1
Tools Needed    
Tool    Part Number    Part Description    Qty    
A     1P-0510     Driver Group     1    
B         Hydraulic Cylinder Repair Stand (1)     1    
C     9U-7868     Spanner Wrench     1    
D     127-8069     Adapter Plate     1    
( 1 ) Refer to the tool guide, NEHC2004, "Hydraulic Cylinder Repair Stands".Start By:
Remove the cylinder. Refer to Disassembly and Assembly, "Tilt Cylinder - Remove". Refer to Disassembly and Assembly, "Lift Cylinder - Remove". Refer to Disassembly and Assembly, "Steering Cylinder - Remove".Note: The disassembly and the assembly procedure for each cylinder is similar. The procedure which follows shows the lift cylinder.
Illustration 1 g00280279
Check the condition of bearing (1). If necessary, use Tooling (A) to replace the bearings with new parts.
Put the cylinder on Tool (B). The weight of the lift cylinder is 57 kg (125 lb). The weight of the tilt cylinder is 60 kg (130 lb). The weight of the steering cylinder is 23 kg (50 lb).
Use Tool (B) to extend the cylinder.
Use Tooling (C) to remove head (8) from cylinder body (2) .
Use Tool (B) to move cylinder body (2) away from rod assembly (9) .
Remove bolt (3) and washer (4) from piston (7) .
Remove piston (7) and head (8) from rod assembly (9) .
Remove seal assembly (5) and wear ring (6) from piston (7) .
Remove the following items from head (8) : O-ring seal (10), backup ring (11), wear ring (12), seal assembly (13), U-cup seal (14), retaining ring (16) and lip seal (15) .Note: Check the condition of all seals and of all components. If any parts are worn or damaged, use new parts for replacement.