Troubleshooting

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

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Motor jammed

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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

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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

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Worn governor

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Worn vanes

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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

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Damaged seals

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Damaged needle bearing

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Damaged spindle bearing

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Damaged gear wheels

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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

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Damaged o-rings

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Damaged bearings

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Grease leakage

Loose oil plug and spindle lock

Tighten oil plug or spindle lock

Worn or damaged seals

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Damaged o-rings

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Damaged bearings

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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

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Vibrations

Worn or damaged grinding wheel

Replace wheel

Autobalancer not working properly

Replace autobalancer

Damaged spindle

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Worn or damaged flange washers

Replace flange washers

Too high idle speed

Governor

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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

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Damaged gear

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Damaged spindle

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Bad noise from gears

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Worn bearings

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