Troubleshooting
The table below shows the most common troubleshooting procedures. Note that some actions must only be done by authorized workshops or qualified service technicians.
Problem |
Reason |
Action |
---|---|---|
Tool does not start |
No air flow to the tool |
Do a check of air connection and compressor |
Rotor in dead position |
Disconnect air supply and then turn spindle quickly | |
Air filter in tool air inlet blocked |
Clean air filter carefully | |
Throttle valve broken |
* | |
Motor jammed |
* | |
Inconsistent idling speed |
Unstable air pressure |
Do a check of air pressure regulator |
Resonance from exhaust |
Start tool rapidly and slowly until noise disappear | |
Worn governor |
* | |
Low power |
Low air pressure |
Do a check of air pressure |
Too long length or too small inner diameter of air supply hoses and pipes |
Do a check of air hoses and air pipes | |
Too small inner diameter of air connections |
Do a check of air connections | |
Blocked air supply filters |
Clean or replace filters | |
Air filter in tool air inlet blocked |
Clean air filter carefully | |
Too humid air (high dew point) |
Do a check of the compressor | |
Worn throttle valve |
* | |
Worn governor |
* | |
Worn vanes |
* | |
Too hot angle gear |
Too much or too little grease in gear box |
Do a check of grease level (to little grease may cause premature wear) |
Blocked air relief passage |
* | |
Damaged seals |
* | |
Damaged needle bearing |
* | |
Damaged spindle bearing |
* | |
Damaged gear wheels |
* | |
Tool too cold by exhaust |
Because of pressure drop of inlet air exhaust air gets cold |
Assemble exhaust hose |
Vanes wear fast |
High friction in motor |
Add oil into inlet air to increase life length of vanes |
Dirty air might wear vanes |
Do a check of filters in tool air inlet and in air supply | |
Gear wear fast |
Too little grease in angle gear |
Refill correct amount of grease regularly. |
Loose oil plug and spindle lock |
Tighten oil plug or spindle lock | |
Worn or damaged seals |
* | |
Damaged o-rings |
* | |
Damaged bearings |
* | |
Grease leakage |
Loose oil plug and spindle lock |
Tighten oil plug or spindle lock |
Worn or damaged seals |
* | |
Damaged o-rings |
* | |
Damaged bearings |
* | |
Too much grease in gear housing |
Do a check of that angle gear has correct amount of grease | |
Tool starts unexpectedly |
Valve pin jammed in start position |
Replace pin and bushing |
Damaged security meachanism |
Replace lever | |
Damaged throttle valve |
* | |
Vibrations |
Worn or damaged grinding wheel |
Replace wheel |
Autobalancer not working properly |
Replace autobalancer | |
Damaged spindle |
* | |
Worn or damaged flange washers |
Replace flange washers | |
Too high idle speed |
Governor |
* |
Too high air pressure |
Do a check of air pressure | |
Abnormal or high sound |
Resonance from exhaust |
Restart tool rapidly and slowly until noise dissapear |
Exhaust hose is missing |
Assemble exhaust hose | |
Too little grease in gear housing |
* | |
Damaged gear |
* | |
Damaged spindle |
* | |
Bad noise from gears |
* | |
Worn bearings |
* |
* This service must only be done by authorized workshop or qualified service technician.