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13. If the piston rod seal (30) must be replaced, remove it from the central opening of the gland.
14. If the cylinder gland seal (28) must be replaced, remove it from the groove at the bottom of
the threads in the housing.
WARNING
In the following step, DO NOT grasp the shaft of the piston
assembly with any device that will mar, bur or otherwise damage the shaft or the drive plate
end of the shaft.
15. Pull the piston assembly out of the housing. If the assembly is tight in the housing and
difficult to pull, inject air into the inlet opening while holding the Housing over a container that
will not dam age the piston when it is expelled. If an air hose is not available, temporarily
attach the advance line from the pump and cycle the tool to advance the piston out of the
housing. Hydraulic oil will be emitted with the piston, so the assembly must be held over a
non–damaging container.
16. If the piston seal (26) must be replaced, remove it from the piston.
17. Push on the small end of the end plug (24) to remove it from the housing.
17 A. For the 56581 model, insert a 1" square drive extension into the small hole in the end plug
of the 56581. Unscrew the end plug from the splined sleeve. Once the two pieces are fully
unscrewed, slip the splined sleeve out of the end with the swivel inlets. Push the end plug
out of the cylinder end of the housing. If the end plug is tight in the housing, gently tap it out
with a flat face drift without cocking it.
18. If the end plug seal (25) must be replaced, remove it from the end plug.
19. If the smalley ring (23) needs replacement, use a thin blade screwdriver to work it out of the
groove.
GENERAL INSTRUCTIONS
1.
Use extra care not to score, nick or damage surfaces that will contain hydraulic oil under
pressure.
2.
Whenever grasping a tool in a vise, always use leather–covered or copper–covered vise
jaws to protect the surface of the part and help prevent distortion.
3. Apply o–ring lubricant to all o–rings before final assembly.
ASSEMBLY OF THE SQUARE DRIVE TOOL
1.
If the smalley ring (23) was removed from the housing (1), install it in the internal groove
near the inlet end of the Housing.
2. Grasp the housing in leather–covered or copper–covered vise jaws with the inlet end
downward.
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ASSEMBLY
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