17
MAINTENANCE SECTION
4. Remove the Motor Clamp Washer (32) and the Motor
Seal (31) from the assembled motor in the Housing.
5. Tap the Motor Housing on a block of wood to remove
the motor assembly from the Motor Housing.
6. Lightly grasp the flats of the Motor Housing in leath-
er--covered or copper--covered vise jaws with the In-
let Bushing (16) upward.
7. Place a 1--3/16” open end wrench on the flats of the
Back Cap (6) to prevent it from rotating, and use a
3/4” wrench to unscrew and remove the Inlet Bush-
ing.
8. Lift the Exhaust Diffuser (15) off the Back Cap.
9. If the Throttle Valve Spring (14) did not come out of
the tool with the Inlet Bushing, use needle nose pliers
to remove it and the Throttle Valve (13) from the Mo-
tor Housing.
10. To remove the Throttle Valve Seat (12), insert a
hooked tool through the central opening of the Seat
and pull it from the Motor Housing.
11. Using a 1/16” pilot punch, tap the Throttle Lever Pin
(11) out of the Back Cap and remove the Throttle
Lever (10).
12. Pull the Throttle Plunger (5) out of the Motor Hous-
ing and remove the assembly from the vise.
13. Holding the assembly horizontally, remove the Back
Cap, the Memory Chip (9) (if included with the tool),
and the Back Cap Gasket (7).
14. If the Muffler Elements (8) need to be cleaned or re-
placed, pull them out of the Back Cap.
Disassembly of the Gearing
1. Using snap ring pliers, remove the Gear Retainer (33)
from inside the Gear Case and remove the Gear Head
Spacer (34).
2.
For Series QS30, QS38 and QS51,
lightly rap the
motor end of the Gear Case on a wooden work bench
top to remove the Planet Gear Head Drive Plate (35),
Planet Gear Head Assembly (36) and the Planet Gear
Head Spacer (39).
For Series QS05 and QS09,
lightly rap the motor
end of the Gear Case on a wooden work bench top to
remove the three Planet Gears (37), the Planet Gear
Head Assembly (36) and the Planet Gear Head
Spacer (39).
For Series QS15 and QS20,
lightly rap the motor
end of the Gear Case on a wooden work bench top to
remove the three Planet Gears (37), the Rotor Pinion
(38), the Planet Gear Head Assembly (36) and the
Planet Gear Head Spacer (39).
If the Spindle Assembly is being removed or re-
placed, the Spindle Bearing and Spindle Cap
Bearing may be damaged during the removal pro-
cess. We recommend that new replacement bear-
ings be available for installation when the tool is
reassembled.
3. Stand the Gear Case on the table of an arbor press
with the threaded end of the Spindle Assembly (40)
upward. Using a rod slightly smaller than the spindle
shaft, press the Spindle Assembly out of the Spindle
Cap Bearing (49) and Spindle Bearing (46).
4. Insert a long, small drift through the central opening
of the Spindle Bearing and push the Bearing Spacer
(47) off to one side. Using a hammer with the drift,
tap the inner ring of the Spindle Cap Bearing. Repeat
the process at several points until the Bearing is free
from the Gear Case. Remove the Bearing Spacer
from the Gear Case.
5. Using snap ring pliers, remove the two Bearing Stops
(48).
6. Stand the Gear Case on the table of an arbor press
with the threaded end upward, and press the Spindle
Bearing out of the Gear case.
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 (32) off the shaft of the Rotor (26)
and remove the Motor Seal (31).
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 (22) from the shaft of the Rotor.
4. Pull the Rear End Plate Face Plate (20) 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 (23).
