Grizzly G0458 - Manual (Page 32)

-30-
Model G0458 (Mfg. Since 5/11)
replacing v-belts
figure 37. Belt drive system.
tools needed: Qty
hex Wrenches 4, 6 & 8mm .......................... 1 Ea
phillips head Screwdriver ...................................1
pry Bar ...............................................................1
inspect the V-belts closely; if you notice fraying,
cracking, glazing, or any other damage, replace
the belts. A worn/damaged V-belt will not provide
optimum power transmission from the motor to
the drum and feed belt.
V-belt removal and replacement is simply a mat-
ter of loosening the V-belts, rolling them off of
the pulleys, replacing them with new belts, then
retensioning them.
to replace the v-belts:
1. disconnect power to the sander!
2. open the pulley cover.
note: If you plan on replacing the variable
speed belt, loosen the cap screw securing
the variable speed pulley (
figure 38) before
loosening the motor mount cap screws.
3. loosen the motor mount cap screws shown
in figure 37 and loosen the cap screw secur-
ing the idler roller.
4. remove the cap screws securing the bearing
bracket and rotate the bearing bracket 90˚.
5. Slide the sanding drum V-belt off of the motor
pulley, then lift the motor mount to remove
the feed V-belt.
note: You may need to use a pry bar to lift
the motor mount.
6. to replace the variable speed belt, remove
the cap screw securing the pulley shown in
figure 38, then remove the outer half of the
pulley.
motor mount Cap Screws
idler
roller
Bearing
Bracket
figure 38. Variable speed pulley.
Variable
Speed pulley
7. Compress the spring behind the inner half
of the variable speed pulley, slide the outer
half of the pulley over the shaft and key, then
thread in the cap screw.
8. install the new feed and drum V-belts, re-
attach the bearing bracket, and tension
according to the instructions on
page 27.
9. tighten the variable speed pulley cap screw
and replace the pulley cover.