20
MAINTENANCE SECTION
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 (16) into the bottom 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 (18) in the
bottom of the motor housing handle and install the
Deflector Retaining Pin (19) 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 the Throttle Rod Seal (6) in the groove on the
large hub of the Throttle Rod (5).
4.
Put the Reverse Lever (11) on the Reverse Valve (8)
and secure it with the Reverse Lever Pin (12).
5.
Start the Reverse Valve into the Throttle Bushing (2).
Install the Reverse Lever Detent Spring (9) in the
hole in the Bushing. Set the Reverse Lever Detent
Ball (10) on the Spring and while holding it in place,
align the Ball with the detent hole in the Bushing.
Push the Valve into the Bushing until the Reverse
Lever Detent Ball seats in the detent hole.
6.
Insert the Throttle Rod, shaft end first, through the
rear of the Throttle bushing and through the Reverse
Valve so that the hub of the Throttle Rod seats against
the end of the Throttle Bushing.
7. Install the Trigger (13) on the Throttle Rod and
secure it with the Trigger Pin (14).
8. Slide the assembled unit into the Motor Housing (1).
9. Install the Throttle Retaining Pin (15) in the Housing,
making sure that it captures the Throttle Bushing
Assembly.
10. Using an arbor press and a piece of tubing that
contacts the outer ring of the bearings, press the Front
End Plate Bearing (29) into the Front End Plate (28)
and the Rear End Plate Bearing (23) into the Rear
End Plate (22). See Dwg. TPD1274.
(Dwg. TPD1274)
END PLATE
TUBING
BEARING
11. Stand the Rotor (26) on the table of an arbor press. It
should be upright on a flat metal plate having a
clearance hole for the shaft. The shaft with the hex
must be upward.
12. Place a 0.001” (0.025 mm) shim on the upward
surface of the large portion of the rotor body. Using a
piece of tubing that contacts the inner ring of the
bearing, press the Front Rotor Bearing and Front End
Plate, End Plate leading, onto the shaft of the Rotor
until the End Plate contacts the shim. Remove the
shim. See Dwg. TPD1275.
(Dwg. TPD1275)
PRESSING PLUG
FRONT ROTOR
BEARING
ROTOR
PLATE WITH ROTOR
SHAFT CLEARANCE
FRONT END PLATE
0.001” (0.025 mm)
SHIM SPACE
13. Coat each Vane (27) with a thin film of oil and insert
a Vane into each of the rotor vane slots with the
straight edge of the Vane outward.