Tensioning & Replacing V-Belts - Grizzly G0768 Owner's Manual

Tensioning &
Replacing V-Belts
V-belts stretch and wear with use, so it is impor-
tant to routinely monitor belt tension. V-belts that
are improperly tensioned or exposed to grease/oil
will slip and poorly transmit power from the motor.
To ensure optimal power transmission, inspect
belts on a monthly basis to verify they are properly
tensioned and free of oil/grease. Replace V-belts
when they become cracked, frayed, or glazed.
Tools Needed
Hex Wrench 3, 4mm ....................................1 Ea.
Open-End Wrench 10, 13 mm .....................1 Ea.
To adjust tension or replace V-belts:
1. DISCONNECT MACHINE FROM POWER!
2.
Remove end cover and electrical panel (see
Figure 139).
Figure 139. Location of parts for removing panel.
3.
Using flat 10mm wrench provided with lathe,
hold pivot block bolt shown in Figure 140,
and loosen hex nut with 13mm wrench.
Pivot Block
Hex Nut
Figure 140. Pivot block bolt and hex nut for
idler pulley adjustment.
Model G0768/G0769 (Mfd. Since 8/15)
Qty
End Cover
Electrical
Panel
Cap Screws to
Remove (1 of 5)
Pivot Block
Bolt
Idler
Pulley
4. Turn tensioner screw (see Figure 141) clock-
wise to tension V-belts or counterclockwise to
loosen V-belts.
—If replacing V-belts, loosen idler pulley and
carefully roll upper and lower V-belts off of
pulleys, then re-install new V-belts in same
manner.
Tensioner
Screw
Idler
Pulley
Lower
V-Belt
Figure 141. Tensioner screw and V-belts.
5. Tension V-belts until there is approximately
⁄ " deflection when pushed with moderate
1
8
pressure, as shown in Figure 142.
Deflection
Figure 142. Correct V-belt deflection.
—If there is more than
the V-belts are pushed with moderate pres-
sure, adjust tension until it is correct.
6.
Tighten pivot block bolt and hex nut loosened
in Step 3.
7.
Re-install and secure end cover and electri-
cal panel.
Upper
V-Belt
Pulley
⁄ "
1
8
Pulley
⁄ " deflection when
1
8
-81-