EN-9
16575250_ed1
EN
Troubleshooting Guide
Trouble
Probable Cause
Solution
Low power or low free
speed
Low air pressure
Check the air line pressure at the Inlet of the tool. It must not
exceed 90 psig (6.2 bar/620 kPa).
Plugged Inlet Bushing Screen or
Air Strainer Screen
Clean the Screen in a clean, suitable, cleaning solution. If it
cannot be cleaned, replace it.
Worn or broken Vanes
Replace the complete set of Vanes.
Worn or broken Cylinder
Replace the Cylinder if it is worn or broken or if the bore is
scored or wavy.
Scoring of End Plates
Replace End Plates if they are scored.
Improper lubrication or dirt build-
up in the motor
Lubricate the Wrench as instructed in
LUBRICATION
. If
lubrication does not result in satisfactory operation,
disassemble the motor inspect and clean all parts.
Clogged muffler
Clean the Muffler Elements in a clean, suitable, cleaning
solution. If they cannot be cleaned, replace them.
Air leakage to exhaust caused by
missing or damaged Housing
Adapter Seal
Replace Housing Adapter Seal.
Air leakage to atmosphere
caused by missing or damaged
Throttle Valve Housing Seal or
Exhaust Deflector Seal
Replace Housing Adapter Seal.
Gear Case gets hot
Excessive grease
Clean and inspect the Gear Case gearing parts and
lubricate as instructed in
LUBRICATION
.
Worn or damaged parts
Clean and inspect the Gear Case and gearing. Replace
worn or broken components.
Inconsistent
disengagement of
Adjustable Clutch
Improper lubrication.
Remove Adjustable Clutch mechanism and check. Lubricate
per instructions.
Worn or damaged parts.
Remove Adjustable Clutch mechanism and examine parts.
Worn Clutch Spring (using Heavy
Clutch Spring on light torque
application.)
Change to Medium or Light Clutch Spring.
Clutch ratchets
Excessive Gap
Reset gap. See
GAPPING PROCEDURE.
Low air pressure at the inlet
Check air supply. For top performance, the air pressure
must be 90 psig (6.2 bar/620 kPa) at the inlet.
Weak Throttle Ball Spring
Replace Throttle Ball Spring.
Excessive load on Plunger
Return Spring
Remove Spacers as necessary. Refer to
SPACING
PROCEDURE.
Worn or defective Clutch
Assembly
Repair or replace Clutch Assembly.
Motor stalls before
Adjustable Clutch
ratchets
Improper Clutch Adjustment or
improper tool ratio for application
Check Clutch Adjustment and review tool performance vs.
requirements.
Tool stalls before shutoff
Low air pressure at inlet
Check air supply. For top performance, the air pressure
must be 90 psig (6.2 bar/620 kPa) at the inlet.
Inadequate air motor
performance
See
LOSS OF POWER
section.
Improper clutch adjustment
Check
Clutch Adjustment.
Improper gear ratio for
application.
Review tool performance requirements in relationship to the
application.
Tool shuts off while free
speeding
Marginal reset
See
NO RESET
section.
No reset
Inadequate load on Plunger
Return Spring
Add Spacers (72B) as necessary. Refer to
SPACING
PROCEDURE.
Clutch Driver hole full of grease
Clean grease from Clutch Driver hole.
Plugged bleed hole in Throttle
Valve Housing Adapter
Clean 0.025” (0.635 mm) hole or replace Throttle Valve
Housing Adapter.
