Ingersoll-Rand HA120RG4, Operation And Maintenance Manual

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26
MAINTENANCE SECTION
3. Remove the Throttle Valve Spring Seat (4), Throttle
Valve Spring (5) and Throttle Valve (6) from the
Motor Housing (8).
4. If the Throttle Valve Seat (7) must be replaced, insert
a hooked tool through the central opening of the Seat
and, catching the underside of the Seat, pull it from
the Housing.
5. Press the Throttle Lever Pin (10) from the Housing
and remove the Throttle Lever (9). Remove the
Throttle Valve Plunger (11).
ASSEMBLY
General Instructions
1. Always press on the inner ring of a ball–type bearing
when installing the bearing on a shaft.
2. Always press on the outer ring of a ball–type bearing
when pressing the bearing into a bearing recess.
3. Whenever grasping a tool or part in a vise, always use
leather–covered or copper–covered vise jaws. Take
extra care not to damage threads or distort housings.
4. Except for bearings, always clean every part and wipe
every part with a thin film of oil before installation.
5. Check every bearing for roughness. If an open bearing
must be cleaned, wash it thoroughly in clean solution
and dry with a clean cloth. Sealed or shielded
bearings should not be cleaned. Work grease into
every open bearing before installation.
6. Apply a film of o–ring lubricant to every o–ring
before installation.
7. Unless otherwise noted, always press on the stamped
end of a needle bearing when installing a needle
bearing into a recess.
Assembly of the Throttle and Inlet
1. Insert the Throttle Valve Plunger (11) into the Motor
Housing (8).
2. Position the Throttle Lever (9) on the Motor Housing
and using an arbor press, press the Throttle Lever Pin
(10) into the Housing and Lever. The Lever will
retain the Plunger in the Housing.
3. If the Throttle Valve Seat (7) was removed, use a 5/8”
wooden dowel with a flat end to push the Seat into the
Motor Housing.
4. Push the small end of the Throttle Valve Spring (5)
onto the end of the Throttle Valve (6) with the short
stem until the Spring snaps into position around the
hub and remains there. Install the dish end of the
Throttle Valve Spring Seat (4) onto the large end of
the Throttle Valve Spring.
5. Holding the Housing with the Lever downward, make
sure the Plunger is out of the way and insert the
assembled Throttle Valve, long stem end leading, into
the housing recess.
6. Push the Inlet Screen (2), closed end leading, into the
bushing of the Inlet Assembly (1). After moistening
the Inlet Seal (3) with o–ring lubricant and being
careful not to nick the Seal on the threads of the Inlet,
install the Seal on the Inlet.
7. Thread the Inlet Assembly into the Housing and
tighten it between 20 and 25 ft–lb (27.1 and 33.9 Nm)
torque.
Assembly of the Motor
1. If the Rear Rotor Bearing (12) was removed, stand the
Rotor (15) upright on the table of an arbor press with
the threaded end downward. Place the threaded rotor
hub into a hole drilled into a flat, smooth block so that
the Rotor rests against the large rotor body. Press the
Rear Rotor Bearing onto the hub of the Rotor.
2. Install the Rear Rotor Bearing Retainer (14) in the
groove on the hub of the Rotor.
3. Install the Front End Plate (17), counterbored end
trailing, onto the threaded hub of the Rotor. Using
finger pressure, press the Front Seal Cup Assembly
(19), felt end trailing, onto the end of the Front End
Plate Spacer (18) that is opposite the the large internal
bevel. Continue pressing until the felt end is flush
with the end of the Spacer. Saturate the felt with
Ingersoll–Rand No. 50 Oil. Place the assembled
Spacer, Seal Assembly trailing, onto the threaded hub
of the Rotor. Make sure the Seal Assembly enters the
recess in the Front End Plate.
Before performing the next step, be aware that the
Front Rotor Bearing is a flush ground bearing and
must be installed in a specific manner. The end of
the Bearing with a black stain or hash marks
must be away from the Spacer.
4. Stand the small hub of the Rotor on the table of an
arbor press with the threaded end upward and press
the Front Rotor Bearing (20) onto the hub of the
Rotor.
5. Grasp the assembled Rotor in copper–covered or
leather–covered vise jaws with the threaded rotor hub
upward.
6. Thread the Bevel Pinion (26) or Spindle Bearing
Nut (39) onto the Rotor and using a torque wrench,
tighten the Pinion or Nut between 14 and 19 ft–lb
(19.0 and 25.8 Nm) torque.