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Disassembly of the Motor
1. If the motor was not removed from the Housing (1) when
the tool was disassembled, slide the Motor Clamp
Washer (33) off the shaft of the Rotor (27) and remove
the Motor Seal (32).
2. Tap the Motor Housing on a block of wood to remove the
motor assembly from the Motor Housing.
3. Using snap ring pliers, remove the Rear End Plate
Assembly Retainer (23) from the shaft of the Rotor.
4. Pull the Rear End Plate Face Plate (22) and Rear End
Plate Assembly (21) off the hub of the Rotor.
5. Using a piece of leather or other type of protective
material, grasp the shaft of the Rotor and pull the Rotor
out of the Cylinder (24).
6. Remove the Vanes (28) from the Rotor.
7. Support the Front End Plate Assembly (29), as near the
rotor body as possible, on the table of an arbor press and
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 to protect
the surface of the part and help prevent distortion. This is
particularly true of threaded members and housings.
4. Except for bearings, always clean every part and wipe
every part with a thin film of oil before installation.
5. Apply O-ring lubricant to all O-rings before final assembly.
6. Check every bearing for roughness. If an open bearing
must be cleaned, wash it thoroughly in a clean, suitable
cleaning solution and dry with a clean cloth. Sealed or
shielded bearings should never be cleaned. Lubricate
all open bearings with grease before installation.
Assembly of the Housing
1. Lubricate the Housing O-ring (2) with O-ring lubricant and
install it at the bottom of the cylinder bore in the Motor
Housing (1).
2. Inspect the face and Reverse Valve Seal (5) on the hub
of the Reverse Valve Assembly (4) for nicks or damage.
Replace the Reverse Valve Assembly or Seal if any
damage is evident.
3. Lubricate the Reverse Valve Seal with O-ring lubricant
and insert the Assembly, seal end leading, into the
cylinder bore of the Motor Housing. Push the Assembly
toward the bottom of the cylinder bore until it "snaps" into
its proper location.
4. Rotate the Valve inside the Housing until the threaded
hole into the side of the Valve aligns with the hole for the
Housing Plug (3) in the side of the Motor Housing.
5. Insert the pin end of the Housing Plug into the hole in the
Reverse Valve and fit the remainder of the Plug into the
recess in the Motor Housing.
6. While holding the Plug in position, from the inlet end of
the Housing, slide the Housing Plug Cover (20) onto the
Housing. Make certain it captures the Plug when it moves
along the Housing and stops against the housing
shoulder.
Assembly of the Motor
1. Place the Front End Plate (29) on the splined shaft of the
Rotor (27) with the bearing recess away from the rotor
body.
2. Place the Front Rotor Bearing (31) onto the shaft and
using a sleeve or piece of tubing that makes contact with
the inner race of the Bearing, press the Bearing onto the
EN-3
press the Rotor from the Front Rotor Bearing (31).
Remove the Bearing from the Front End Plate.
Disassembly of the Housing
1. Pull the Housing Plug Cover (20) off the inlet end of the
Motor Housing (1).
2. If the Housing Plug (3) does not drop out of the Housing
when the Cover is removed, tap the inlet end of the
Housing on a block of wood to dislodge the Plug from the
Housing.
3. Insert a 5/16" wooden dowel between 6 and 8 inches
long, into the inlet end of the Motor Housing and push the
Reverse Valve Assembly (4) out the motor end of the
Housing.
4. Use a hooked tool to pull the Housing O-ring (2) out of
the Motor Housing.
shaft until the Front End Plate nearly contacts the rotor
body.
NOTICE
In the following step, the measurement must be made at
the end corner of the large rotor body.
3. The clearance between the Front End Plate and Rotor is
critical. While pressing downward with your finger on the
outer edge of the Front End Plate on the bearing side of
the End Plate, insert a 0.004" (0.1 mm) feeler gauge
between the face of the rotor body and the face of the
End Plate at a point that is 180 degrees away from where
the pressure is applied. Refer to Dwg. TPA1740. To
increase the gap, support the End Plate and lightly tap
the rotor shaft with a plastic hammer; to decrease the
gap, press the Bearing farther onto the rotor shaft.
Measurement of Front End Plate Clearance
PRESSURE
(Dwg. TPA1740)
4. Wipe each Vane (28) with a light film of Ingersoll Rand
No.10 Oil and place a Vane in each slot in the Rotor.
5. One end of the Cylinder Assembly (24) has a notch that
breaks the outer wall and end face of the Cylinder. With
that end trailing, install the Cylinder Assembly over the
Rotor and Vanes against the Front End Plate. Make
certain the Cylinder Front Alignment Pin (26) enters the
hole in the Front End Plate.
6. Install the Rear End Plate Assembly (21), flat face
leading, on the rear hub of the Rotor. Make certain the
Cylinder Rear Alignment Pin (25) enters the hole in the
Rear End Plate.
7. Examine the Rear End Plate Face Plate (22) for
scratches. If it is scratched, replace it. If it is not, slide it
FEELER
GAUGE
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