Mirka PROS 650CV 8995650111 [53/216] Troubleshooting guide

Mirka PROS625CV [53/216] Troubleshooting guide
52 MirkPROS • 150 mm (6") • 125 mm (5") MirkPROS • 150 mm (6") • 125 mm (5") 53
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Troubleshooting guide
Symptom Possible cause Solution
Low power and/ or low free speed. Speed control set to low speed. Turn the speed control to desired speed.
Low air pressure. Check air supply (according to operating
instructions).
Clogged muffler. Clean or replace the muffler.
Plugged air inlet screen. Clean or replace the screen.
Internal air leakage in the motor housing. Check motor assembly and alignment.
Check air inlet O-ring alignment on motor
assembly.
Worn or broken vanes. Install a complete set of new vanes and
rotor (Kit F).
Housing cracked or damaged. Contact Mirka authorized service centre.
Worn or broken spindle bearing. Replace the worn or broken bearing
(Kit A).
Air leakage at the speed control. Dirty, broken or bent valve spring, valve
or valve seat.
Disassemble, inspect and replace worn or
damaged parts.
Incorrect assembly of air valve. Remove air inlet connection and
reassemble the air valve (207), with the
valve stem (202) in its upper position.
Vibration / rough operation. Incorrect backing pad. Only use Mirka backing pad 125 mm (5"),
150 mm (6").
Addition of interface or other material. Only use abrasive and/or interface
designed for the machine.
Damaged backing pad. Replace the pad. Only use Mirka backing
pad 125 mm (5"), 150 mm (6").
Worn or broken motor bearing(s). Replace the worn or broken bearings.
Too much vacuum on a flat surface can
increase vibrations.
Lower the vacuum of your dust extraction
unit.
Low motor speed. Increase motor speed with flow regulator,
max 6.2 bar.

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