Page 6
OVERHAUL
CAUTION: Always disconnect the air supply
before any overhaul or maintenance. The
disassembly and reassembly procedures can be
accomplished by following the instructions below
and the drawings on pages 9 & 10. Use extreme
care during disassembly and reassembly not to
mar, nick or burr any smooth surface that
comes in contact with O-rings. Before installing
O-rings, be sure to apply an O-ring lubricant. It is
recommended that special assembly tools, which
can be ordered under part number G701/G704KT,
be used to overhaul this tool.
Service kit, G746KS, which contains a complete
set of O-rings, back-up rings, screws, washers and
gaskets should be ordered.
Not shown, but included:
701A67 Seal Guide
702B62 Power Cylinder Tool,
703A53 Seal Guide
702A64 Seal Guide
AIR VALVE
Disconnect tool from air supply. Remove
retaining ring (28) and muffler (27). Insert a valve plug extractor (P-1178) into end of valve plug (26) and pull it out. Using the
same procedures, pull out spool assembly (54).
Use needle nose pliers to grasp the end of the spring (20), turn clockwise and pull out to dislodge from groove in handle.
With spring removed, valve sleeve (19) can be pulled out using the valve sleeve removal tool (837B700).
To re-assemble, reverse the above procedures being certain that all O-rings are properly lubricated. To avoid damaging the O-rings (56),
carefully install sleeve (19) with your finger. Gently push and wiggle sleeve to allow O-rings to slip past inner ports. Spring (20) is best
installed using a valve spring installation tool (836B700) to push the large diameter coil into the groove. This requires care as the tool
will not operate if the spring is not anchored firmly.
HEAD SUB-ASSEMBLY
Disconnect air supply and remove the complete pulling head from the tool before attempting to disassemble the head
assembly.
Remove the four socket head cap screws (49). Lift head assembly from the handle (18). Remove O-ring (50) and gasket (51).
Empty the oil into a container by pouring from the handle. Dispose of the oil according to environmental regulations.
Remove end cap (10). Push against threaded end of head piston (4) and slide it out of head body (1). Be careful not to
damage threads or cause burrs on polished head piston rod surface.
O-rings (2) and back-up rings (3) can now be removed using a bent hook. O-ring (8) can be removed in the same manner.
Upon re-assembly, be sure to install O-rings and back-up rings carefully to avoid cutting them. Always lubricate all O-rings. Just
prior to placing the head sub-assembly on to the handle, see Fill and Bleed Instructions. Also make sure to place O-ring (50) and
the gasket (51) on the top of the handle, and that they are properly oriented.
Tighten the four socket-head cap screws (49) uniformly to prevent leakage around the gasket.
Purge system of air using Cherry air bleeder (700A77) according to the “Fill and Bleed Instructions”.
TOOL KIT
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