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38 P7440 Edition 10
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.
TROUBLESHOOTING GUIDE
Trouble Probable Cause Solution
Loss of Power Low air pressure Check air supply. For top performance, the air pres-
sure must be 90 psig (6.2 bar/620 kPa) at the inlet.
Plugged Inlet Bushing Screen Clean the Inlet Bushing Screen using a clean, suitable
cleaning solution. If the Screen cannot be cleaned,
replace it.
Worn or broken Vanes Replace a complete set of Vanes.
Worn or broken Cylinder Replace the Cylinder if it is cracked or if the bore
appears wavy or scored.
Exhaust control restricted Make certain the Exhaust Diffuser against the Back
Cap is in the fully open position.
Shutoff Valve too short Lengthen the Shutoff Valve. Refer to “TESTING
THE TOOL” on page 37
Motor won’t run Motor Clamp Washer binding Remove the Gear Case make certain the Washer is
flat and the Motor Seal is properly positioned.
Gears binding Clean and inspect all gearing. Replace any worn or
damaged gearing.
Push Rod worn Install a new Push Rod.
Gear Case gets hot Excessive grease Clean and inspect Gear Case and gearing parts and
lubricate as instructed.
Worn or damaged parts Clean and inspect the gear Case and Gearing.
Replace worn or broken components.
Inconsistent disengagement of
the Adjustable Clutch
Improper lubrication Remove the Adjustable Clutch mechanism and exam-
ine the parts. Lubricate as instructed.
Wrong Clutch Spring (using Heavy
Clutch Spring on light torque
application)
Change to Medium or Light Clutch Spring.
Motor stalls before Adjustable
Clutch ratchets
Improper Clutch adjustment or
improper tool ratio for application
Check Clutch Adjustment and review tool perfor-
mance vs. requirements.
Low pressure at the inlet Check the air supply. For top performance, the air
pressure must be 90 psig (6.2bar/620kPa) at the inlet.
Insufficient grease Lubricate the Clutch as instructed.
Improper exhaust control adjust-
ment
Adjust the exhaust flow to obtain the desired speed.
Tool ratchets before shutoff Push Rod too long Shorten the push Rod. Refer to“TESTING THE
TOOL” on page 37
Tool stalls without shutting off Shutoff Valve too short Lengthen the Shutoff Valve. Refer to “TESTING
THE TOOL” on page 37
Too runs slower than normal Shutoff Valve too short Lengthen the Shutoff Valve. Refer to “TESTING
THE TOOL” on page 37
MAINTENANCE (Continued)