Ribbed Belt Replacement; Bearing Preload - Grizzly G9972Z Owner's Manual

Ribbed Belt
Replacement
the ribbed ribbed belt transfers power from the
motor to the secondary drive pulley (see figure
78). if the ribbed belt becomes excessively worn
or damaged, you will need to replace it.
figure 78. ribbed belt and motor mount hex
nuts.
Tools Needed
hex Wrench 5mm (optional) .............................. 1
Wrench 14mm ................................................... 1
To replace the ribbed belt:
1. disConneCt Lathe FroM poWer!
2.
open the change gear cover and remove the
V-belt.
3. Loosen the four motor mount hex nuts and
raise the motor up.
Note: It may be more convenient to access
the motor mount hex nuts if you first remove
the rear splash guard.
4. roll the old ribbed belt off the pulleys and
replace it with a new one, making sure that
the belt ribs are seated in the pulley indents.
5.
Lower the motor to produce reasonable ten-
sion on the ribbed belt, then re-tighten the
motor mount hex nuts.
6. re-install the V-belt and close the cover.
G9972Z 11" x 26" Lathe w/Gearbox
this lathe is shipped from the factory with the
spindle bearing preload properly adjusted. if the
spindle ever develops excessive end-play and the
workpiece finish suffers, you can adjust the bear-
ing preload to remove the unnecessary end-play
and improve the workpiece finish.
Tools Needed
spanner Wrench 2" ........................................... 1
Large phillips screwdriver ................................. 1
dial indicator with Magnetic Base ..................... 1
ribbed
heavy dead Blow hammer ............................... 1
Belt
Wooden Block ................................................... 1
Motor
To adjust the spindle bearing preload:
Mount
hex nuts
1.
(2 0f 4)
2.
3.
Qty
figure 79. outboard end of spindle and spanner

Bearing preload

run the lathe for approximately 20 minutes
on high speed to bring the lathe to normal
operating temperature.
disConneCt Lathe FroM poWer!
remove the chuck or faceplate from the
spindle, then open the change gear cover to
expose the outboard end of the spindle (see
figure 79).
spindle
outboard end
nuts.
Qty
spanner nuts
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