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The tool does not rotate under no load.
The tool rotates under no load.
●
Symptoms of troubles and countermeasures
Symptoms
Supposed causes
Immediately stop
using the tool.
〇
Ask your YOKOTA dealer
for repair.
Countermeasures
If there is no improvement with
above countermeasures and repair.
W
arming-up operation
Confirmation of air pressure
The repair is authorized.
Yes
Repair
No
Main shaft
rotates if it
is turned by
fingers.
Main shaft does
not rotate even
if it is turned by
fingers.
The tool
does not
stop even
after a
throttle lever
is released.
When under load
The tool
does not
work.
(No pulsing)
The oil pulse
unit slips.
Dust contamination
Too low air pressure
Motor part seizure
Faulty assembled motor
Dust contamination
Damaged vane
Damaged
Ball bearing
Motor part seizure
Malfunction of a throttle
Pulse unit seizure
Damaged spring for blades
Damaged knock pin of the liner
Damaged spring for blades
Oil leak
Low T
emperature
