MIRKA PROS Serie Instructions D'utilisation page 62

en (original)
Troubleshooting guide
Symptom
Low power and/ or low free speed.
Air leakage at the speed control.
Vibration / rough operation.
Further service
Servicing must always be performed by trained personnel. To keep the tool warranty valid and ensure optimal tool safety
and function, servicing must be carried out by a Mirka authorized service centre. To locate your local Mirka authorized
service centre, contact Mirka Customer Service, your Mirka dealer or go to www.mirka.com
62
Mirka® PROS 150 mm (6"), 125 mm (5")
Possible cause
Speed control set to low speed.
Low air pressure.
Exhaust plug not aligned (DB model).
Clogged muffler.
Plugged air inlet screen.
Internal air leakage in the motor
housing.
Worn or broken vanes.
Housing cracked or damaged.
Worn or broken spindle bearing.
Dirty, broken or bent valve spring,
valve or valve seat.
Incorrect assembly of air valve.
Incorrect backing pad.
Addition of interface or other material.
Damaged backing pad.
Worn or broken motor bearing(s).
Too much vacuum on a flat surface
can increase vibrations.
Low motor speed.
Solution
Turn the speed control to desired
speed.
Check air supply (according to operat-
ing instructions).
Check that one of the four marks on
the exhaust plug is aligned with the
single mark below the exhaust plug.
Clean or replace the muffler.
Clean or replace the screen.
Check motor assembly and alignment.
Check air inlet O-ring alignment on
motor assembly.
Install a complete set of new vanes
and rotor (Kit F).
Contact Mirka authorized service
centre.
Replace the worn or broken bearing
(Kit A).
Disassemble, inspect and replace worn
or damaged parts.
Remove air inlet connection and reas-
semble the air valve (207), with the
valve stem (202) in its upper position.
Only use Mirka backing pad 125 mm
(5"), 150 mm (6").
Only use abrasive and/or interface
designed for the machine.
Replace the pad. Only use Mirka back-
ing pad 125 mm (5"), 150 mm (6").
Replace the worn or broken bearings.
Lower the vacuum of your dust extrac-
tion unit.
Increase motor speed with flow regu-
lator, max 6.2 bar.