Ingersoll-Rand 61H Series, Maintenance Information

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15. Thread the Throttle Handle Assembly into the assembled Arbor
Housing and tighten the joint between 74 and 100 ft-lb (100 and
135 Nm) torque.
16. Install the two Rear End Plate Retaining Screws flush with the
handle surface or one thread below flush. If the Screws protrude
above the handle surface, the Rear End Plate Assembly is not
properly engaged and is out of position.
17. After assembling the tool, test the Grinder. If the Controller
length “B” and nozzle face length “C” were within tolerance and
the Controller locks the Grinder in an inoperable condition when
tested, replace the Controller Assembly.
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. 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 Rotor Seal Assembly
if worn or damaged or replace the Front Rotor Bearing.
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 Seal
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 and/or the outside diameter of the Controller Seal is
worn to 1.511” (38.379 mm) or smaller.
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, 04580288.
Product Information Manual 16573214, 16576100, 16576118, 16576126.
Parts Information Manual 16573263.
Manuals can be downloaded from ingersollrandproducts.com.