Ingersoll-Rand HA120RG4, Operation And Maintenance Manual

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MAINTENANCE SECTION
TROUBLESHOOTING GUIDE
Trouble Probable Cause Solution
Front Rotor Bearing runs hot Incorrect installation of the Front
Seal Cup Assembly Reposition the Front Seal Cup Assembly flush
with the face of the Front End Plate Spacer.
Front End Plate Spacer rubbing
the bore of the Front End Plate Replace the Front End Plate and Front End Plate
Spacer combination.
Incorrect Front Rotor Bearing
installation orientation 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.
Slow tool idle Bent or leaky Throttle Valve Replace the Throttle Valve.
Air leakage around Flow Ring Damaged, mutilated or missing
Flange Clamp Replace the Flange Clamp.
Damaged Flow Ring Replace the Flow Ring.
Rough operation/vibration Improper lubrication or dirt
buildup Disassemble the tool and clean in a suitable clean-
ing 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.
Worn or broken Rear Rotor
Bearing or Front Rotor Bearing 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.
Worn or broken Upper Arbor
Bearing or Lower Arbor Bearing Replace the worn or broken Bearing.
Worn or broken Bevel Gear or
Bevel Pinion Examine the Bevel Gear and Bevel Pinion. If
either is worn or damaged, replace both the Gear
and the Pinion because they are a matched set and
must not be used separately.
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.