16575128_ed2
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Troubleshooting Guide
Trouble
Probable Cause
Solution
Low power or low free speed
Insufficient air pressure at the inlet
Check the air pressure at the inlet of the Tool. It must
be 90 psig (6.2 bar/620 kPa).
Plugged Screen
Clean the Inlet Bushing Screen in a clean, suitable, cleaning
solution. If it cannot be cleaned, replace it.
WARNING
Never operate a Grinder without an Inlet Screen.
Ingestion of dirt into the Grinder can, in some cases,
cause an unsafe condition.
Worn or broken Vanes
Replace a
complete
set of new Vanes.
Worn or broken Cylinder
Replace the Cylinder if it appears cracked or if the bore is
wavy or scored.
Improper lubrication or dirt build-up in
the motor
Lubricate the Grinder as instructed in
LUBRICATION
.
If lubrication does not result in satisfactory operation,
disassemble the motor, clean and inspect all parts.
Rough operation
Worn or broken Rear Rotor Bearing
Assembly or Front Rotor Bearing
Examine each bearing. Replace the Rear End Plate Assembly
if worn or damaged or replace the Front Rotor Bearing.
NOTICE
Rear End Plate Assembly is a matched set. See
disassembly and assembly instructions.
Worn or broken Bevel Gear or Pinion
Check for worn or broken teeth. If a replacement is necessary,
install both the Bevel Gear and Pinion. They are a matched
set and must not be mismatched.
Bent Arbor
Mount the Arbor on centers. Check bearing diameter runout
with an indicator. Replace the Arbor if runout exceeds 0.002”
(0.051 mm) Total Indicator Reading.
Scoring
Improper assembly
Make certain that
all
motor parts are properly aligned prior
to installing the Handle Assembly into the Arbor Housing.
Air leaks
Worn Valve Seat or Valve Seat Washer
Replace worn parts.
Worn Throttle Valve Seals
Replace both Seals.
Oil Chamber Plug worn or not tight
Tighten the Plug. If the problem persists, replace the Plug.
High free speed
Worn Rear End Plate Assembly and/or
Controller Assembly
Replace the Rear End Plate Assembly if the large inside
diameter of the Rear End Plate is worn to 1.156” (38.506 mm)
or larger
Grinder will not run
Coupling Nut too tight
Loosen Coupling Nut and retighten to 47.5 to 52.5 ft-lb (64.5
to 71.5 Nm) torque.
WARNING
Do not exceed 52.5 ft–lb (71.5 Nm) torque.
Related Documentation
For additional information refer to:
Product Safety Information Manual 04584959 and 04580387.
Product Information Manual 80221740, 80221757, 80221765 and 80221773.
Parts Information Manual 16574071.
Manuals can be downloaded from ingersollrandproducts.com