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Providing all maintenance conditions have been met, follow this systematic approach to diagnosis.
1. MORE THAN ONE PULL IS REQUIRED TO BREAK FASTENER.
a)
Tool needs to be bled. (See filling and bleeding procedures pgs. 11-12).
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 LEVER (704345) IS DEPRESSED.
a)
Polyseal (A-1118) and o'rings (400789) on piston (704507) could be worn or damaged. Replace.
b)
Back-up ring (S908) and o'ring (A-201) on piston rod assembly (744136) could be worn or damaged. Replace.
c)
Muffler (744143) or filter inside valve spool assembly (744140) may be plugged with dirt. Clean thoroughly and back-blow
with compressed air.
d)
Hole in metering screw in valve spool assembly (744140) may be blocked or damaged. Hole diameter should be .028" (.71 mm).
Clear and size or replace.
3. NO OPERATION WHEN LEVER (704345) IS DEPRESSED.
a)
Tool seized due to mechanical failure or damaged parts.
4. OIL LEAKAGE.
a)
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 must 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 (744138), valve spool assembly (744140), 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.
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.
GB704SH-5 PNEUDRAULIC INSTALLATION TOOL..
TROUBLESHOOTING
DISCONNECT AIR FROM
13
TOOL, remove the nose from the tool and disassemble.
12/21 REV 4/22
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