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G0449/G0450 37" Drum Sander
-31-
Removal/Replacement
Replace the V-belt if you notice fraying, cracking,
glazing, or any other damage. A worn/damaged
V-belt will not provide optimum power transmis
-
sion from the motor to the drums.
V-belt removal and replacement is simply a matter
of loosening the V-belts until you can roll them off
the pulleys, replacing them with a MATCHED set,
then re-tensioning them.
Note: A matched set means all the V-belts are
the same size and also have the same serial
number.
To adjust V-belt tension:
1. Disconnect power to the sander!
2. Open the side cover.
3. Turn the motor mount nuts in the direction
shown in
Figure 30 to loosen or tighten the
V-belts.
Figure 30. V-belt tension controls.
Tighten
V-Belts
Loosen
V-Belts
Pulley Alignment
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. Remove the V-belts.
4. Place a straightedge across the face of the
motor pulley and front drum pulley to check
the alignment. The straightedge should sit
evenly on the top and bottom part of both pul
-
leys, as shown in
Figure 31.
5. Repeat Step 4 with the straightedge placed
against the motor pulley and rear drum pul
-
ley.
6. Adjust the pulleys as necessary until they are
all coplanar with each other.
Figure 31. Checking pulley alignment with a
straightedge.