8
Rev. 3/13
OVERHAUL
The disassembly and re-assembly procedure can be accomplished by utilizing the following instructions and drawings. Use extreme
care during disassembly and re-assembly not to mar or nick any smooth surface that comes in contact with seals. Before installing
seals, always apply a good lubricant, such as Lubriplate®, to the surfaces. It is recommended that tool kit (GB740TK) be used to
facilitate overhaul. A complete overhaul can be achieved by the use of Service Kit 740002 which contains a complete set of o'rings,
back-up rings, screws, washers and gasket. It is recommended that this service kit be kept available for spare parts.
WARNING:
DEPRESS TRIGGER AND DISCONNECT FROM AIR WITH HEAD PISTON IN THE REAR POSITION BEFORE
OVERHAUL. SEVERE PERSONAL INJURY MAY OCCUR IF AIR HOSE IS NOT DISCONNECTED.
USE
CAUTION
WHEN FORCING PISTON ROD ASSEMBLY DOWNWARD WITH HEAD CYLINDER ASSEMBLY REMOVED,
HYDRAULIC FLUID WILL EJECT FORCIBLY FROM HANDLE.
HEAD
Remove nose assembly and adapter from tool before attempting disassembly of head assembly.
Remove end cap (740112). Push against threaded end of head piston (740308) to slide it out of head cylinder (740109). Be careful not
to damage threads or cause burrs on polished piston rod surface.
WARNING:
DISPOSE OF HYDRAULIC FLUID IN ACCORDANCE WITH ALL ENVIRONMENTAL LAWS AND REGULATIONS
APPLICABLE TO YOUR AREA..
The re-assembly sequence is the opposite of disassembly. (See Filling and Bleeding instructions.) Apply Loctite® #242 and torque
the button head cap screws (402479) uniformly to 40 inch lbs. to prevent leakage around the gasket.
GB740TK Service Tool Kit Includes:
704149
Piston Rod Wrench Assembly
704150
Packing Plug Wrench Assembly
704151
Power Cylinder Tool
704152
Seal Guide
S1178
Valve Extractor
744151
Valve Spring Installation Tool
744152
Valve Sleeve Removal Tool
704214
STEM CATCHER BAG
704149
PISTON ROD WRENCH
704151
POWER CYLINDER TOOL
704152
SEAL GUIDE
704150
PACKING PLUG WRENCH
704153
BLEEDER BOTTLE
744151
VALVE SPRING
INSTALLATION TOOL
744152
VALVE SLEEVE
REMOVAL TOOL
S1178
VALVE EXTRACTOR
(704214 CATCHER BAG SHOWN ABOVE IS SOLD SEPARATELY)
400787 - O'RING
A-294 - O'RING
740109
HEAD CYLINDER
S945 - O'RING
740101
NOSE FITTING
740112 - CAP
740308 - PISTON
401208
SOC. HD. CAP SCREW
402482 - BUT HD CAP SCREW
S572
STAT-O-SEAL
401208
SOC. HD. CAP SCREW
S108 - BACK-UP RING
S945 - O'RING
