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Check and Countermeasures
Low r.p.m.
Faulty
impulse part
Faulty motor part
Faulty
shut off
valve
part
Daily check: Before use, check generated torque of a tool.
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Symptoms of troubles and countermeasures
Tool does not shut off.
Symptoms
Supposed causes
Air leakage by damaged packing
Dust contamination
Rust
Faulty fly-out of vane
Dull sound
Incomplete cleaning of motor part
Motor case cover tightening failure
Adjustment failure for a rotor and upper plate
Vane warn-out
Ball bearing failure
Pulse number less than the default value
Pulse number more than the default value
Oil leak
Impulse unit
deterioration
Throttle lever opening and closing operation failure
Silencer jam
Damaged
Ball bearing
Too low air pressure
Reverse lever opening and closing operation failu
re
The repair is authorized.
Yes
Repair
If there is no improvement with
above countermeasures and repair.
No
Immediately stop
using the tool.
〇
Ask your YOKOTA dealer
for repair.
Countermeasures
Switch R and L
securely
Pressure and adjust bolt adjustment
The tool rotates under no load
Dust contamination