4
45761848_ed3
Troubleshooting Guide
Trouble
Probable Cause
Solution
Low power or low free
speed
Insufficient air pressure
Check air line pressure at the inlet of the tool. It must
be 90 psig (6.2 bar/620KPa).
Clogged Muffler elements
Disassemble the tool’s inlet, if the Muffler can’t be
cleaned, replace it.
Plugged Inlet Screen
Clean the Inlet Screen with a clean, suitable cleaning
solution or replace the Screen.
Worn or broken vanes
Install a complete set of new Vanes.
Worn or broken Motor Housing
Replace the Motor Housing.
Internal air leakage in the Motor Housing indicated
by high air consumption/low speed or air leaking out
the front and rear exhaust simultaneously.
Replace the Motor Housing.
Bent stem on Throttle Valve
Remove the Throttle Valve.
Angle Gear Wick misaligned or damaged.
Reposition or replace the Wick.
Excessive run out
Bent Arbor
Replace the Arbor.
Loose Collet Nut
Tighten the Collet Nut.
Worn or damaged Collet, Collet Nut or Nosepiece
Replace the damaged component and retest.
Worn or damaged upper Arbor Bearing or lower
Arbor Bearing
Replace the worn or damaged Bearing.
Scoring of end plate
Worn front end plate Spacer or front end plate
Install a new front end plate Spacer and front end plate.
Worn front Rotor Bearing
Install a new front Rotor Bearing.
Leaky Throttle Valve
Dirt accumulation on Throttle Valve or Throttle Valve
Seat.
Disassemble, inspect and clean parts.
Worn Throttle Valve or Throttle Valve Seat
Replace the Throttle Valve and/or Throttle Valve Seat.
Excessive dirt build-up beneath the Throttle Lever.
Clean out the slot area.
Bent Throttle Valve Plunger
Replace the plunger.
Front Rotor Bearing runs
hot
Front end plate Spacer rubbing the bore of the front
end plate
Replace the front end plate and front end plate Spacer
combination.
Slow tool idle
Bent or leaky Throttle Valve
Replace the Throttle Valve.
Rough operation/vibration
Improper lubrication or dirt buildup
Disassemble the tool and clean in a suitable cleaning
solution. Assemble the tool and inject 3 cc of the
recommend oil in the inlet and run the Grinder long
enough to coat the internal parts with the oil.
Worn or broken rear Bearing or front Rotor Bearing
Replace the worn or broken Bearing. Examine the
front end plate. Front end plate Spacer, and rear Rotor
Bearing, 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
Examine 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.
Related Documentation
For additional information refer to:
Product Safety Information Manual 04580288.
Product Information Manual 45760899.
Parts Information Manual 45760923, 45760915 and 45760907.
Manuals can be downloaded from ingersollrandproducts.com.
