LSV39 SA12-125 EN Troubleshooting
© Atlas Copco Industrial Technique AB - 9839 0621 01
17
Troubleshooting
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 regula-
tor
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 con-
nections
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 reg-
ularly.
Loose oil plug and spindle lock Tighten oil plug or spindle lock
Worn or damaged seals *
Damaged o-rings *
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