9
TROUBLESHOOTING GUIDE
Symptom
Possible Cause(s)
Corrective Action
Tool does not
run at a normal
speed or at a
variable speed
Air supply is not enough
(air pressure not at required
standard)
Check the air hose to see whether it is blocked
or twisted causing less air supply
Speed controller/switch
breaks down
Check the air compressor to gain the correct
air pressure required
The motor
blocks
Rotor blades break or wear
out
Replace rotor blades
Dust gets into the motor
Disassemble the tool and clean the inner
structure under proper instructions
Automatic start
when
connected to
compressed air
Throttle lever or starting
trigger malfunctions
Check and fix the throttle lever or starting
trigger for accurate operation
Air leakage
Check the air leakage and fix it under proper
instruction
Reduced
torque
Bearing(s) damaged
Replace damaged bearing(s)
Abnormal
vibration (Heat
rising from the
housing)
Corresponding O-Ring(s)
wear out or out of position
Replace damaged O-Ring(s) or put it back in
correct position
Lack of lubrication
Oil/lubricate the tool consistently until it gains
the right speed and torque
Note: For any troubles which cannot be resolved, please contact the selling agent, where you
purchased the tool
WARNING: Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect the air supply before servicing.
