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21. Grasp the handle of the Motor Housing in vise jaws
with the rotor shaft upward. Thread the Front End
Plate Spacer (30) into the Housing and using the end
plate spacer spanner, tighten the Spacer to 33 ft–lb
(45 Nm) torque. This is a left–hand thread; rotate the
wrench counterclockwise to tighten. (Refer to
Dwg. TPD1280.)
COUNTERCLOCKWISE TO TIGHTEN
SPANNER
22. After installing the Front End Plate Spacer, grasp the
shaft of the Rotor and rotate it by hand. If the Rotor
does not turn easily, disassemble the motor unit and
determine where the assembly is binding. The motor
must rotate freely before proceeding further with the
assembly.
Assembly of the Impulse Mechanism
1. Install the Rear Liner Cover O–ring (39) in the annular
groove around the Rear Liner Cover (38).
2. Insert the Relief Valve (43) into the Liner (40).
3. Place a Blade Spring (47) into each hole in one of the
slots of the Drive Shaft (44).
4. Place the Blade (45) against the Springs so that each
Spring encircles a Blade Spring Pin (46).
5. Compress the Springs with the Blade until the Blade is
flush with the Drive Shaft and install the assembly in
the Liner with the output end of the Drive Shaft
protruding out the end of the Liner containing the
Relief Valve. (Refer to Dwg. TPD1284.) Make certain
the ends of the Blade are flush with the ends of the
Liner.
MAINTENANCE SECTION
(Dwg. TPD1279)
(Dwg. TPD1280)
24
6. Place the Rear Liner Cover Assembly against the
motor end of the Liner making sure that the two Liner
Rear Pins (41) enter the holes in the Cover and the rear
hub of the Drive Shaft enters the central opening of the
Cover.
7. Install the Front Liner Cover Assembly (48) over the
Drive Shaft against the spindle end of the Liner
making sure that the two Liner Front Pins (42) enter
the holes in the Cover and the Relief Valve aligns with
the opening in the Cover.
8. Install the Drive Shaft Seal (49) followed by the Seal
Back–up Ring (50) on the Drive Shaft against the hub.
(Refer to Dwg. TPD1285.)
DRIVE SHAFT SEAL
9. Install the assembled Liner and Covers in the Liner
Housing (31) making certain that the Relief Valve is in
alignment with the opening for the Torque Adjustment
Bolt (34).
10. Install the Adjustment Bolt Seal (35) followed by the
Seal Washer (35A) and Seal Back–up Ring (36) on the
Torque Adjustment Bolt and thread the assembled Bolt
into the Liner Housing.
11. Install the Adjustment Bolt Stop Ring (36A) in the
groove of the Liner Housing to keep the Bolt Assembly
from backing out.
12. Install the Oil Plug (32) and Oil Plug Seal (33) in the
liner housing hole 180 degrees from the Torque
Adjustment Bolt.
(Dwg. TPD1284)
SEAL BACK–UP RING
(Dwg. TPD1285)
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