Grizzly MODEL G0765 owner manual Timing Belt Tension Replacement, Tensioning Timing Belt

Timing Belt Tension

& Replacement

The timing belt transfers power from the motor to the drive pulley (see Figure 89).

Because the molded teeth in the belt fit together with matching teeth in the pulley, the timing belt will not slip unless the belt teeth become overly worn or belt tension is overly loose.

An improperly tensioned timing belt will slip, which quickly causes it to become damaged and unsuit- able for further use. Therefore, it is essential to maintain belt tension properly to prevent slippage.

Once a timing belt begins to slip, it must be replaced in order to regain proper power transmis- sion.

	Drive	Motor
	Pulley	Mount
		Hex Nuts
Timing
	Belt

Motor

Pulley

Figure 89. Timing belt and motor mount hex

nuts (components removed for clarity).

Tools Needed	Qty
Hex Wrench 4mm	1
Hex Wrench 5mm	1
Open-End Wrench/Socket 10mm	1
Phillips Head Screwdriver	1
Punch & Hammer or
Adjustable Spanner Wrench	1
Black Fine-Tip Felt Marker	1

Tensioning Timing Belt

1.DISCONNECT LATHE FROM POWER!

2.Perform Steps 2–5on Page 61 to remove components to access timing belt.

3.Verify belt is centered on drive pulley (see Figure 89) by hand-rotating chuck. The belt should be seated so it does not contact head- stock or hang out at end of pulley.

—If belt is not centered, loosen motor mount hex nuts (see Figure 89), re-adjust motor position and re-tension belt.

4.Loosen both motor mount hex nuts.

5.Ensure belt teeth are properly engaged in pulley notches, push down on motor with light/moderate pressure, and tighten motor mount hex nuts.

Note: Position motor so you can access brush cap through hole in bed.

The timing belt is correctly tensioned when there is approximately 1⁄8" deflection when it is pushed with moderate pressure, as shown in Figure 90.

Pulley

Deflection

1⁄8"

Pulley

Figure 90. Correct timing-belt deflection.

—If there is more than 1⁄8" deflection when timing belt is pushed with moderate pres- sure, loosen motor mount hex nuts, and adjust tension until it is correct.

6.Perform Steps 9–11on Page 61 to re-install components you removed earlier.

-60- Model G0765 (Mfd. Since 12/13)