South Bend Tools
For Machines Mfd. Since 12/21
Model SB1102
-37-
S E R V I C E
Adjusting/Replacing
V-Belts
New V-belts often stretch and loosen up during
the first 16 hours of use. After this period,
they should be inspected and re-tensioned if
necessary. Replace V-belts if you notice fraying,
cracking, glazing, or any other damage. A worn/
damaged belt will not provide optimum power
transfer from the motor to the drums.
The sanding drums are driven by two V-belts.
The belts must have proper tension for optimum
power transfer. However, too much tension may
cause premature bearing failure. Proper tension
is achieved when the belts deflect about
3
⁄
4
"
with moderate finger pressure at the midpoint
between the drum pulley and the motor pulleys
(see Figure 47).
Items Needed:
• Open-End or Socket Wrench 17mm
• Straightedge (at least 24")
• Tape Measure
• Phillips Screwdriver #2
• Hex Wrench 5mm
• Hex Wrench 3mm
Belt Tension
Figure
Figure 47. Proper V-belt deflection.
. Proper V-belt deflection.
Motor Pulley
Approx.
3
⁄
4
"
Deflection
Drum Pulleys
Always inspect V-belts for damage or
deterioration when adjusting tension. Should
you find evidence of fraying, cracking, or
other damage, replace the belt immediately.
Belt breakage could lead to mechanical
damage or operator injury.
1.
DISCONNECT MACHINE FROM POWER!
2.
Remove handwheel and micro-adjustment
knob.
3.
Open dust hood and disconnect right side
support arm (see Figure 48).
Belts and pulleys will be hot after operation.
Allow them to cool before handling.
4.
Remove (10) machine screws, shown in
Figure 49, from right side panel and
carefully remove panel.
Figure
Figure 48. Dust hood support arm location.
Dust hood support arm location.
Dust Hood
Dust Hood
Support Arm
Support Arm
Adjustment Knob
Adjustment Knob
Set Screw
Set Screw
!
To adjust V-belt tension:
Figure
Figure 49. Right side panel machine screws.
Right side panel machine screws.
x 10
