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WARNING
Always turn off the power supply, bleed off hydraulic fluid from the hose connections on
the cylinder assembly and disconnect the hoses before attempting to repair or perform
maintenance on this tool. Always wear eye protection when operating or performing
maintenance on this tool.
GENERAL INSTRUCTIONS
1. Do not disassemble the tool any further than necessary to replace or repair damaged parts.
2. Use extra care not to score, nick or damage surfaces that will contain hydraulic oil under
pressure.
3. 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.
4. Do not remove any part that is press fit in or on an assembly unless the removal of that part
is necessary for repairs or replacement.
5. Do not disassemble the hydraulic cylinder assembly unless you have a complete set of
seals and o–rings for replacement.
DISASSEMBLY OF THE REACTION ARM ASSEMBLY
1. Push the reaction arm retract button (8) toward the reaction arm boot (4) and separate the
reaction arm assembly from the housing (1).
2. While holding the button down, use a hex wrench to unscrew and remove the reaction arm
spline screw (9).
3. Apply some downward pressure to the reaction arm engagement pin (7) and unscrew the
reaction arm retract button from the engagement pin.
4. Remove the engagement pin by sliding it out of the top of the reaction arm (3).
5. Pull the reaction arm splined sleeve (10) out of the reaction arm (3).
6. Using a hooked tool through the spline screw opening, pull the reaction arm pin spring (6)
out of the reaction arm.
7. To remove the reaction arm boot, use a hex wrench to unscrew the two boot mounting
screws (5) and pull the boot off the reaction arm.
DISASSEMBLY OF THE SQUARE DRIVE TOOL
1. Before attempting to disassemble a square drive tool, connect the tool to a pump and
operate the tool until the piston assembly (27) is in the fully retracted position.
2. Grasp the housing (1) in copper–covered or leather–covered vise jaws with the inlet end
upward and using a 3/4" wrench, unscrew and remove the two swivel inlets (33) with their
attached couplers (34).
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MAINTENANCE SECTION
DISASSEMBLY
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