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Trouble
Leaky Throttle Valve
Exhausts at wrong direction
Front Rotor Bearing runs hot
Slow tool idle
Air leakage around Flow Ring
Rough operation/vibration
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.
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MAINTENANCE SECTION
TROUBLESHOOTING GUIDE
Probable Cause
Dirt accumulation on Throttle
Valve or Throttle Valve Seat
Worn Throttle Valve or Throttle
Valve Seat
Excessive dirt build–up beneath
the Throttle Lever
Bent Throttle Valve Plunger
Incorrect orientation of the Flow
Ring
Incorrect installation of the Front
Seal Cup Assembly
Front End Plate Spacer rubbing
the bore of the Front End Plate
Incorrect Front Rotor Bearing
installation orientation
Bent or leaky Throttle Valve
Damaged, mutilated or missing
Flange Clamp
Damaged Flow Ring
Improper lubrication or dirt
buildup
Worn or broken Rear Rotor
Bearing or Front Rotor Bearing
Worn or broken Rear Arbor
Bearing in TX models or Front
Arbor Bearing in TX or TXD
models
Dirt contaminated Front Arbor
Bearing in TX or TXD models
Bent, worn or broken Extension
Arbor on TX or TXD models
31
Solution
Disassemble, inspect and clean parts.
Replace the Throttle Valve and/or Throttle Valve
Seat.
Clean out the slot area.
Replace the Plunger.
Reverse the face of the Flow Ring against the
Motor Housing.
Reposition the Front Seal Cup Assembly flush
with the face of the Front End Plate Spacer.
Replace the Front End Plate and Front End Plate
Spacer combination.
If a black stain or black hashmarks are not visible
on the face of the Bearing when it is assembled
with the End Plate and Rotor, the Bearing is
installed backwards. If possible, remove the Bear-
ing and install it correctly or replace the Bearing.
Replace the Throttle Valve.
Replace the Flange Clamp.
Replace the Flow Ring.
Disassemble the Tool and clean in a suitable
cleaning solution. Assemble the Tool and inject
3 cc of the recommended oil into the Inlet and run
the Grinder long enough to coat the internal parts
with the oil.
Replace the worn or broken Bearings. Examine the
Front End Plate, Front End Plate Spacer Front Seal
Cup Assembly and Rear Rotor Bearing Spacers
and replace any damaged parts. If the rear end
plate is damaged, replace the Rotor.
Replace the worn or broken Bearing.
Replace the Bearing.
Replace the Extension Arbor if, when mounted
between centers, the runout on the arbor body ex-
ceeds 0.002" T.I.R. or 0.0005" T.I.R. on the bear-
ing mounting diameters.
REV.000
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