-39-
Immediately stop
using the tool.
〇
Ask your YOKOTA dealer
for repair.
The tool does not rotate under no load.
The tool rotates under no load.
Countermeasures
Symptoms
Supposed causes
●
Symptoms of troubles and countermeasures
The tool
does not
work.
(No pulsing)
The oil pulse
unit slips.
When under load
Main shaft does
not rotate even
if it is turned by
fingers.
Main shaft
rotates if it
is turned by
fingers.
The tool
does not
stop even
after a
throttle lever
is released.
Dust contamination
Seized main shaft bushing
Damaged ball bearing
Damaged vane
Motor part seizure
Motor part seizure
Too low air pressure
Too low air pressure
Faulty assembled motor
Pulse unit seizure
Damaged spring for blades
Damaged knock pin of the liner
Damaged spring for blades
Oil leak
Low T
emperature
Malfunction of a throttle
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
