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3. Reposition the Motor Housing in the vise jaws so that
the vise jaws grip the end of the rotor shaft and the
Housing is horizontal. Tap the edges of the Housing
surrounding the motor bore with a plastic hammer to
separate the Housing from the motor. Refer to
Dwg. TPD1298.
4. Remove the motor from the vise jaws and remove the
Front End Plate (25), Front End Plate Bearing (27),
Cylinder Assembly (20) and Vanes (24) from the Rotor.
5. On the table of an arbor press, support the Rear End
Plate (18) with blocks as close to the Rotor as possible
and press the Rotor out of the Rear End Plate and Rear
Rotor Bearing (19).
6. To remove the Rear Rotor Bearing from the Rear End
Plate, use a small drift or pin punch through the central
opening of the Rear End Plate to tap the Bearing out of
the End Plate. Refer to Dwg. TPD1299.
Do not enlarge or damage the shaft hole in the End
Plate.
7. Press the Reverse Lever Pin (4) out of the Reverse
Lever (2) and remove the Reverse Lever, Reverse Lever
Seal (3), Throttle Valve Spring (9) and the Throttle
Ball (10).
8. Spread the end of the Suspension Bail (17), where the
ends enter the Motor Housing, and remove the Bail.
MAINTENANCE SECTION
(Dwg. TPD1298)
(Dwg. TPD1299)
22
9. Using a pin punch, tap the Throttle Lever Pin (8) and
the Deflector Retaining Pin (16) out of the Handle.
Remove the Throttle Lever (7), Throttle Plunger (11)
and the Exhaust Deflector Assembly (15).
10. Push the Reverse Valve Assembly (5) out the throttle
lever end of the Housing and Remove the two Reverse
Valve Bushing Seals (14) if they need to be replaced.
11. Unscrew and remove the Inlet Bushing (13).
ASSEMBLY
General Instructions
1. When 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.
2. Always press on the inner ring of a ball–type bearing
when installing the bearing on a shaft.
3. Always press on the outer ring of a ball–type bearing
when pressing the bearing into a bearing recess.
4. Except for bearings and mechanism parts, always clean
every part and wipe every part with a thin film of oil
before installation.
5. Wipe a thin film of mechanism fluid on all internal
mechanism components before installing them in the
mechanism.
6. Apply a film of O–ring lubricant to every O–ring before
installation.
Assembly of the Motor
1. Thread the Inlet Bushing (13) into the threaded hole at
the rear of the handle of the Motor Housing (1) and
tighten it between 30 and 35 ft–lb (40 and 47 Nm)
torque.
2. Position the Exhaust Deflector Assembly (15) in the
hole at the rear of the motor housing handle and install
the Deflector Retaining Pin (16) to secure it in position.
It may be necessary to slide the Assembly in or out
in order to align the groove in the Assembly with the
pin hole.
3. Install two new Reverse Valve Bushing Seals (14) in the
grooves inside the reverse valve bushing, if they were
removed.
4. Install the Reverse Valve Seal (6) in the groove next to
the large hub of the Reverse Valve (5).
5. Install the Reverse Valve Assembly, seal end trailing,
into the lever side oif the Motor Housing. Make certain
the square depression on the shft of the Valve faces
forward toward the output end of the tool.
6. Install the Reverse Lever Seal (3) in the groove on the
small hub of the Reverse Lever (2).
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