Grizzly G0704 owner manual Motor Service, To inspect and replace the motor brushes

Motor Service

The bearings inside the motor are shielded and lubricated for the life of the bearing and require no routine maintenance.

This motor is equipped with long life carbon brushes. Brush life expectancy is affected by motor loading. Heavy motor loading will result in reduced brush life. If you notice a loss in power or if the motor becomes excessively noisy, inspect the brushes. If the brushes are worn down to 1⁄4'' (6mm) or less, it is time to replace them. When checking brushes, be sure to return each brush to the same hole in the same direction that it came from. When replacing old brushes, replace both brushes at the same time.

Tools Needed:	Qty
Hex Wrench 3mm	1
Standard Screwdriver #2	1

To inspect and replace the motor brushes:

1.DISCONNECT MILL/DRILL FROM POWER!

2.Un-install the motor cover by removing the four cap screws that secure it (Figure 58).

Motor Cover

Cap Screw (1 of 4)

Figure 58. Removing motor cover.

Model G0704 (Mfg. since 09/09)

3.Unscrew one of the brush caps to expose the brush assembly (Figure 59).

Brush Cap

Figure 59. Removing brush cap.

4.Remove the old brush assembly. If the brush is worn down to less than 1⁄4'' (6mm) then replace it with a new one. Otherwise re-install the brush (Figure 60).

Brush

Assembly

Figure 60. Installing new brush assembly.

5.Replace the brush cap to secure the brush in place.

6.Repeat for second brush assembly on the other side of the motor.

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