Disassembly of the Motor and Throttle

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).

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).