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Rev. 1/14

TROUBLESHOOTING

Providing all maintenance conditions have been met, follow this systematic approach to diagnosis.
1. MORE THAN ONE PULL IS REQUIRED TO BREAK RIVET.

a)  Tool needs to be bled. (See filling and bleeding instructions.)
b)  Spring has fatigued, replace.
c)  Jaws are stripped or packed with chips. Clean or replace.
d)  Incorrect nose tip.

2. SLOW OR PARTIAL OPERATION WHEN THE AIR ACTUATOR ASS’Y IS DEPRESSED

a)  O’Ring (403815) and Back-Up Rings (401119) could be worn or damaged. Replace.
b)  Back-Up Rings (S908) and O’Ring (A-201) could be worn or damaged. Replace.
c)  Muffler (744143) or filter inside Valve Spool Ass’y (743142) may be plugged with dirt. Clean thoroughly and back-blow

with compressed air.

d) Hole in metering screw in valve spool ass’y (743142) may be blocked or damaged. Hole diameter should be .028". Clear

and size or replace.

3. NO OPERATION WHEN AIR ACTUATOR ASS’Y IS DEPRESSED

a) Tool seized due to mechanical failure or damaged parts.

4. OIL LEAKAGE

DO NOT

OPERATE WITH OIL LEAKING FROM TOOL. HIGH PRESSURE OIL MAY CAUSE SEVERE PERSONAL INJURY.

b) Any oil leaking externally should be traced to its source. An o'ring or seal that leaks should be replaced.

5. AIR BYPASS FROM VALVE HOUSING

a) If the spring (744144) breaks or dislodges, air will flow freely through the muffler (744143). Replace or reset. Valve spring

installation tool (744251) is recommended.

b) Check o'rings on valve sleeve (743144), valve spool ass’y (743142), and valve plug (744142). If worn or damaged, replace.

Valve sleeve removal tool (744152) is recommended.

6. FASTENER STEM JAMMED IN NOSE ASSEMBLY

a) Nose assembly components require service.

DISCONNECT AIR FROM TOOL

, remove the nose from the tool and

disassemble. Replace worn or broken parts. Clean the surface the jaws ride on.

b) Stems lodged side by side in the follower. Disassemble, remove stems, and reassemble.

c) Incorrect follower.

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 (GB745TK) be used to
facilitate overhaul. A complete overhaul can be achieved by the use of Service Kit (745017) which contains a complete set of o'rings,
back-up rings, screws, washers and gasket.

WARNING:

DEPRESS AIR ACTUATOR ASS’Y AND DISCONNECT FROM AIR WITH 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.

(756610 CATCHER BAG SHOWN ABOVE IS SOLD SEPARATELY)

Part No.

Description

745155

Piston Rod Wrench

704150