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22
MAINTENANCE SECTION
A thread locking compound was applied to the
threads of the Bevel Gear Nut (48) during
assembly. It may be necessary to warm the Nut
with a propane torch in order to remove it. Use
only enough heat to warm the Nut for removal.
Do not overheat.
9. Grasp the flats of the Depressed Center Wheel Arbor
in leather–covered or copper–covered vise jaws,
Arbor Bearing end up. Using a wrench, remove the
Bevel Gear Nut.
10. Remove the Bevel Gear Spacer (49) and Bevel Gear
(40).
11. Press the Arbor Lower Bearing Assembly (50) from
the Arbor. Remove the Lower Arbor Spring Washer
(51). Remove the Arbor from the vise.
For GRP15A or GRS15A Models:
1. Grasp the Angle Arbor Housing (43) in
leather–covered or copper–covered vise jaws, angle
head up.
2. Use a No. DG120–69 Sander Arbor Wrench to hold
the Arbor (55). Remove the Pad Mounting Kit
Nut (57).
3. For GRP15A Models, remove the Wool Bonnet (58).
Unscrew and remove the Sanding Pad Assembly (56).
4. For GRS15A Models, remove the Sanding Pad
Assembly.
5. Remove the Pad Mounting Kit washers (57).
6. Unscrew and remove the Retaining Plate Screws (54).
Remove the Screw Lock Washers (53) and the Sander
Arbor Retaining Plate (52).
Do not remove the Mounting Plate Pin (45) unless
it is bent or broken. The Mounting Plate Pin is the
alignment pin for the Sander Arbor Retaining
Plate. Use pliers to remove the Mounting Plate Pin
if removal is necessary and a new Pin is on hand.
7. Remove the Angle Arbor Housing from the vise.
8. Lay the Angle Arbor Housing (43) on a workbench,
guard side down. Lightly tap the Angle Arbor
Housing with a soft hammer to release the Upper
Arbor Bearing (47) and Upper Bearing Spring Washer
(46).
A thread locking compound was applied to the
threads of the Bevel Gear Nut (48) during
assembly. It may be necessary to warm the Nut
with a propane torch in order to remove it. Use
only enough heat to warm the Nut for removal. Do
not overheat.
9. Grasp the flats of the Sander Arbor (55) in
leather–covered or copper–covered vise jaws, arbor
bearing end up. Using a wrench, remove the Bevel
Gear Nut.
10. Remove the Bevel Gear Spacer (49) and Bevel Gear
(40).
11. Press the Arbor Lower Bearing Assembly (50) from
the Arbor. Remove the Lower Arbor Spring Washer
(51). Remove the Arbor from the vise.
Disassembly of the Throttle Lever and Inlet
1. Grasp the flats of the Throttle Handle (1) in
leather–covered or copper–covered vise jaws, air inlet
up.
2. Remove the Inlet Bushing (4), Inlet Bushing Screen
(5) and the Throttle Valve Spring (6). The Bushing
has an interference thread and is tightly fit.
3. Drive out the Throttle Lever Pin (16) to release the
Throttle Lever Assembly (17).
4. Remove the Throttle Handle from the vise.
5. Using a soft hammer, tap the arbor end of the housing
to release the Throttle Valve Assembly (2), or using
snap ring pliers, pull the Assembly from the Throttle
Handle. Remove the two Seals (3).
Disassembly of the Motor and Throttle
1. Grasp the Angle Arbor Housing (43) horizontally in
leather–covered or copper–covered vise jaws.
2. Using No. 77H–281 Coupling Nut Wrench, remove
the Coupling Nut (21).
3. Grasp the Throttle Handle (1) and pull the Handle
from the Arbor Housing.
4. Grasp the splined end of the Rotor (26) and pull the
motor from the Throttle Handle.
5. Remove the Cylinder Dowel (30).
6. Grasp the splined end of the Rotor in leather–covered
or copper–covered vise jaws.
7. Remove the Front End Plate (28) and Front Rotor
Bearing (29) from the Rotor.
8. If the Front Rotor Bearing needs to be replaced, press
it from the Front End Plate.
9. Lift off the Cylinder (25).
10. Remove the Vanes (27).