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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 procedure 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 ACTUATOR ASSEMBLY-AIR (704130) IS DEPRESSED.
a)
O'Ring (403815) and Back-Up Rings (401119) on piston (745310) could be worn or damaged. Replace.
b)
Back-Up Rings (S908) and O'Ring (A-201) on piston rod assembly (745344) could be worn or damaged. Replace.
c)
Muffler (744143) or filter inside Valve Spool Assembly (743142) may be plugged with dirt. Clean thoroughly and back-blow
with compressed air.
d)
Hole in metering screw in valve spool assembly (743142) may be blocked or damaged. Hole diameter should be .028" (.71 mm).
Clear and size or replace.
3. NO OPERATION WHEN ACTUATOR ASSEMBLY-AIR (704130) 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 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 assembly (743142), and valve plug (744142). If worn or damaged, re-
place. Valve sleeve removal tool (744152) is recommended.
6. FASTENER STEM JAMMED IN NOSE ASSEMBLY.
a)
Nose assembly components require service.
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.
WARNING:
Disconnect tool from its power source before actuator removal or installation. Severe personal injury may occur if
power source is not disconnected.
CAUTION:
Actuator assembly-air (704130) can break if not careful.
CAUTION:
Do not over tighten actuator assembly-air (704130). Snug tighten only.
GB745 INSTALLATION TOOL S/N: 3569 AND ABOVE
PLEASE CONTACT GAGE BILT FOR ALL OTHER SERIAL NUMBERS.
TROUBLESHOOTING
DISCONNECT AIR FROM
OVERHAUL
ACTUATOR ASSEMBLY-AIR
REMOVING ACTUATOR ASSEMBLY-AIR (704130)
1.
Remove actuator lever assembly (704343) including pin-slotted (400608) from
handle assembly (744129).
2.
Insert a 5/8" open end / adjustable wrench around actuator assembly-air (704130).
3.
Loosen the actuator assembly-air (704130).
4.
Remove wrench. Unthread and remove the actuator assembly-air (704130) with
fingers from the handle assembly (744129).
INSTALLING ACTUATOR ASSEMBLY-AIR (704130)
1.
Apply Teflon® tape onto threads of actuator assembly-air (704130) one to two wraps.
2.
Thread the actuator assembly-air (704130) all the way into handle assembly (744129) with
fingers.
3.
Insert and turn 5/8" open end / adjustable wrench and snug tight approximately 1/4-1/2 turn.
4.
Re-attach actuator lever assembly (704343) including pin-slotted (400608) to
handle assembly (744129).
14
TOOL, remove the nose from the tool and
Rev. 6/22
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