2480 & 2481 series Hydraulic Installation Tools (HK970)
11
DISASSEMBLE CYLINDER ASSEMBLY
1. Place spacer over threaded end of piston; then thread
piston assembly tool onto the piston. If the cylinder
contains fluid, push the piston rearward and drain the
fluid into a container. Discard the fluid.
2. Remove pintail deflector from end cap by twisting and
pulling in one motion.
3. With a 1-5/16 open-end wrench, unscrew end cap.
4. Using optional Piston Assembly Tool, press piston, with
unloading valve, and end cap/rear gland out through
the rear of the tool. (Figure 9)
5. Slide end cap and unloading valve from piston; then
remove piston insertion tool and spacer.
6. Use a small diameter pointed rod to remove all seals,
wipers, O-rings and back-up rings from components
and discard them.
Do not re-use any seals.
Clean parts,
including O-ring grooves. Examine all components for
wear or defects, and replace as required.
Disassembly Procedure
Remove Pintail Deflector and unscrew End Cap.
Press piston assembly with remaining components
through the back of the tool, and remove them in
the order shown (1-5).
Remove and discard all seals from subassemblies.
3
4
5
1
2
Front
Gland
Assembly
PRESS
123111-2 Piston
Assembly Tool
123112-2
Spacer
End Cap
Pintail Deflector
Unloading Valve
Rear
Gland
Assembly
Piston
Figure 9
TOOL SHOWN WITH HANDLE HALVES REMOVED AND PISTON ASSEMBLY TOOL INSTALLED
