Yokota YED-90, Manual

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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
Low r.p.m. Faulty motor part
Symptoms
Supposed causes
Faulty
impulse part
The tool rotates under no load
Daily check: Before use, check generated torque of a tool.
● Symptoms of troubles and countermeasures
Reverse lever opening and closing operation failure Too low air pressure Damaged
Ball bearing
Silencer jam Throttle knob opening and closing operation failure Impulse unit
deterioration
Oil leak Pulse number more than the default value Pulse number less than the default value Ball bearing failure Vane worn-out Adjustment failure for a rotor and upper plate Motor case cover tightening failure Incomplete cleaning of motor part Dull sound Faulty fly-out of vane Dust contamination Air leakage by damaged packing
Low torque (Insufficient tightening torque)
Check and countermeasures