Troubleshooting Guide - MIRKA RPS 300CV Instructions D'utilisation

Symptom
Low power and/or low free
speed.
Air leakage through the Speed
Control and/or Valve Stem.
Vibration/rough operation.
DOC A3230

Troubleshooting Guide

Possible Cause
Insufficient air pressure.
Clogged Muffler)s(.
Plugged Inlet Screen.
One or more worn or broken Vanes.
Internal air leakage in the Motor Housing
indicated by higher than normal air con-
sumption and lower than normal speed.
Motor parts worn.
Worn or broken Spindle Bearings.
Dirty, broken or bent Valve Spring, Valve
or Valve Seat.
Incorrect Pad.
Addition of interface pad or other material.
Improper lubrication or buildup of foreign
debris.
Worn or broken rear or front Motor
Bearing(s).
For vacuum machines it is possible to
have too much vacuum while sanding on a
flat surface, causing the pad to stick to the
sanding surface.
Check airline pressure at the inlet of the tool
while the tool is running at free speed. It must be 6.2
bar (90 psig/620 kPa).
The Muffler can be back-flushed with a clean, suitable
cleaning solution until all contaminants
and obstructions have been removed. If the Muffler
cannot be properly cleaned then replace it.
Clean the Inlet Screen with a clean, suitable cleaning
solution. If the Screen cannot be cleaned, replace it.
Install a complete set of new Vanes (all vanes must
be replaced for proper operation(. Coat all vanes with
quality pneumatic tool oil.
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.
Overhaul Motor. Contact authorized Mirka Service
Center.
Replace the worn or broken Bearings.
Disassemble, inspect and replace worn or damaged
parts.
Only use Pad sizes and weights designed for the
machine.
Only use abrasives and/or interfaces designed for the
machine. Do not attach anything to the Backing Pad
that was not specifically designed to be used with the
Pad and tool.
Disassemble the tool and clean in a suitable cleaning
solution. Reassemble the tool.
Replace the worn or broken Bearings.
For CV machines reduce vacuum through the vacu-
um system and/or add extra washer)s( to the pad.
31
Solution
Rev 02/13/17