Mirka RP-300NV 8993540311 [33/124] Troubleshooting guide

Mirka RP-300NV [33/124] Troubleshooting guide
30
DOC A1228 Rev 04/06/16
Symptom Possible Cause Solution
Low power and/or low free
speed.
Insufcient air pressure. Check airline pressure at the inlet of the Polisher
while the tool is running at free speed. It must be 6.2
Bar (90 psig/620 kPa).
Clogged Mufer)s(. See the “Housing Disassembly” section for Mufer re-
moval. The Mufer can be back-ushed with a clean,
suitable cleaning solution until all contaminants
and obstructions have been removed. If the Mufer
cannot be properly cleaned then replace it.
Plugged Inlet Screen. Clean the Inlet Screen with a clean, suitable cleaning
solution. If the Screen cannot be cleaned, replace it.
One or more worn or broken Vanes. Install a complete set of new Vanes (all vanes must
be replaced for proper operation(. Coat all vanes with
quality pneumatic tool oil.
Internal air leakage in the Motor Housing
indicated by higher than normal air con-
sumption and lower than normal speed.
Check for proper Motor alignment and Lock Ring
engagement. Check for damaged O-Ring in Lock
Ring groove. Remove Motor Assembly and reinstall
the Motor Assembly.
Motor parts worn. Overhaul Motor. Contact authorized Mirka Service
Center.
Worn or broken Spindle Bearings. Replace the worn or broken Bearings.
Air leakage through the Speed
Control and/or Valve Stem.
Dirty, broken or bent Valve Spring, Valve
or Valve Seat.
Disassemble, inspect and replace worn or damaged
parts.
Vibration/rough operation.
Incorrect Pad. Only use Pad sizes and weights designed for the
machine.
Addition of interface pad or other material. Only use abrasives and/or interfaces designed for the
machine. Do not attach anything to the Polisher Pad
face that was not specically designed to be used
with the Pad and Polisher.
Improper lubrication or buildup of foreign
debris.
Disassemble the Polisher and clean in a suitable
cleaning solution. Reassemble the Polisher.
Worn or broken rear or front Motor
Bearing(s).
Replace the worn or broken Bearings.
Note: All sections referred to under “Solution” are located at the end of the manual in “Service Instructions”.
Troubleshooting Guide

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