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Model G0768/G0769 (Mfd. Since 8/15)
Replacing Brushes
This machine is equipped with one (G0768) or two
(G0769) universal motors that use carbon brushes
to transmit electrical current inside the motor. These
brushes are considered to be regular "wear items" or
"consumables" that will eventually need to be
replaced. The frequency of this replacement is
directly related to how much the motor is used
and how hard it is pushed.
Replace the carbon brushes when the motor no lon-
ger reaches full power, or when the brushes mea-
sure less than
1
⁄4" long (new brushes are
5
⁄8" long).
Tools Needed Qty
Hex Wrench 3, 4mm .....................................1 Ea
Flat Head Screwdriver #2 .................................. 1
Phillips Head Screwdriver #2 ............................ 1
G0768/G0769 Lathe Motor Replacement Brushes:
P0768046
G0769 Mill Motor Replacement Brushes:
P0769786
6. Unscrew brush cap and carefully remove
brush from motor (see Figure 151).
7. Install new brush and re-install brush cap.
8. Repeat Steps 5–7 to replace bottom motor
brush.
9. Re-install motor with screws removed earlier.
10. Tension V-belts (refer to Tensioning V-Belts
on Page 81 for details).
11. Re-install back splash, electrical panel, and
end cover.
12. G0769 Only: Re-install cable harness onto
back splash with cable clamp.
Figure 150. Location of top motor brush cap
(Model G0768 shown).
Brush Cap
Figure 151. Top motor brush components
removed (Model G0768 shown).
Brush Cap
Brush
4. Remove motor mount cap screws (see Figure
149).
5. Rotate motor to access top motor brush
shown in Figure 150.
1. DISCONNECT MACHINE FROM POWER!
2. Remove end cover, electrical panel, and
back splash to access motor brushes.
Note: Carefully handle the electrical panel.
Try to avoid straining any wires so they do
not disconnect. On Model G0769 remove mill
motor cable harness and cable clamp from
back splash before removing it.
3. Loosen tensioner screw several turns (see
Figure 149) to remove tension on V-belts.
Replacing Lathe Motor Brushes
Figure 149. Motor mounting screws
(Model G0768 shown).
Tensioner
Screw
Motor Mount
Cap Screws