Ingersoll-Rand HA120RG4, Operation And Maintenance Manual

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MAINTENANCE SECTION
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/620 kPa).
Clogged muffler elements Disassemble the tool and agitate bare Motor Hous-
ing and Flange in a clean, suitable, cleaning solu-
tion. If elements cannot be cleaned, replace the
Motor Housing and/or the Flange.
Plugged Inlet Screen Clean the Inlet Screen in a clean, sutable, cleaning
solution or replace the Screen.
Worn or broken Vanes Install a complete set of new Vanes.
Loose Clamp Nut or Arbor
Housing Tighten the Nut or Housing between 20 and
25 ft–lb (27 and 34 Nm) torque.
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.
Grit buildup under the Throttle
Lever restricting full Throttle
Valve Plunger movement. Remove the Throttle Lever and clean the groove
in the Motor Housing.
Bent stem on Throttle Valve Replace the Throttle Valve.
Front Seal Cup Assembly
dragging against the shield of
the Front Rotor Bearing Reposition the Front Seal Cup Assembly.
Excessive runout Bent Arbor Replace the Arbor.
Loose Collet Nut Tighten the Collet Nut until snug.
Worn or damaged Collet or
Collet Nut 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.
Exhausts at wrong direction Incorrect orientation of the Flow
Ring Reverse the face of the Flow Ring against the
Motor Housing.