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G0458 18" Open End Belt/Drum Sander
-31-
Tools Needed: Qty
Hex Wrenches 4 & 8mm ..............................1 Ea
Phillips Head Screwdriver .................................
1
Pry Bar ..............................................................
1
Pulley alignment is another important factor in
power transmission and belt life. The pulleys
should be parallel to each other and in the same
plane (coplaner) for optimum performance.
Each pulley can be adjusted by loosening the set
screw that secures the pulley to the shaft, sliding
the pulley in/out, and retightening the set screw to
lock the pulley in place.
To align the pulleys:
1. Disconnect power to the sander!
2. Open the pulley cover.
3. Looking from the top, sight down the V-belts
and pulleys and check to see that the pulleys
are parallel and aligned with each other (see
Figure 37).
— If the pulleys are aligned, go to Step 9
.
— If the pulleys are NOT aligned, perform
Steps 4–8
.
Tools Needed: Qty
Wrench 8mm .....................................................
1
Hex Wrench 4mm ..............................................
1
The feed belt must track straight. If the feed belt
tracks to either side, then the tracking must be
corrected or the feed belt will become damaged
and have to be replaced.
Tracking the feed belt is a balancing process that
takes patience and a small degree of trial-and-
error. Usually you must over-tighten the loose side
(the side the belt is tracking towards) to make the
feed belt move to the middle of the rollers, then
loosen that same side to make the feed belt stay
in position. If you adjust the bolt too much either
way, then you have to repeat the process until the
feed belt rides in the middle and stays there dur
-
ing continuous operation.
Note:
Tracking affects tension, so tension must
always be adjusted after tracking.
To track the feed belt:
1. Turn the feed belt ON and watch it track. If
the belt moves to one side, immediately stop
the machine and adjust the belt tracking. If
the belt tracks evenly, leave it alone.
Feed Belt Tracking
Pulley Alignment
Figure 37. The pulleys should be parallel and
aligned.
4. Remove the V-belts.
5. Loosen the set screws on the motor pulley
and align the motor pulley with the feed belt
pulley.
6. Loosen the set screws on the sanding belt
pulley and align the sanding belt pulley with
the motor pulley
.
7. Tighten the set screws, replace the V-belts,
and repeat
Step 3. Belts should be parallel
and aligned as shown in
Figure 37.
8. Adjust the pulleys again, if necessary, until
they are all coplanar with each other.
9. Replace the pulley cover.