TROUBLESHOOTING
-38-
For Machines Mfd. Since 10/20
South Bend Tools
Model SB1093
TROUBLESHOOTING
If you need replacement parts, or if you are unsure how to do any of the solutions given here, feel free
to call us at (360) 734-1540.
Symptom
Possible Cause
Possible Solution
Machine does not
start or a breaker
trips.
1.
Incorrect power supply voltage or
circuit size.
1.
Ensure correct power supply voltage and circuit
size.
2.
Blown fuse/tripped circuit breaker
at main panel.
2.
Correct the cause of overload, then reset/replace
fuse or breaker.
3.
Plug/receptacle at fault/wired
incorrectly.
3.
Test for good contacts; correct the wiring.
4.
Thermal overload relay has tripped.
4.
Allow relay/motor to cool. If necessary, press reset
button inside switch.
5.
Break or short in wiring; or loose
connections.
5.
Trace/replace broken or corroded wires; fix loose
connections.
6.
Motor ON/OFF switch at fault.
6.
Replace switch.
7.
Motor connection wired incorrectly.
7.
Wire motor correctly (refer to inside junction box
cover or manual).
8.
Start capacitor blown or at fault.
8.
Replace start capacitor.
9.
Contactor not energized/has poor
contacts.
9.
Test all legs for power, test field coil and replace if
at fault.
10.
Centrifugal switch at fault.
10.
Adjust/replace centrifugal switch.
11.
Motor at fault.
11.
Test for shorted windings, bad bearings and repair
or replace.
Machine stalls or is
underpowered.
1.
Too much pressure when feeding
workpiece.
1.
Reduce pressure when feeding workpiece.
2.
Sanding belt in not tensioned
properly.
2.
Check sanding belt tension. Re-tension sanding belt
(
Page 30
).
3.
V-belt is worn or not tensioned
properly.
3.
Inspect/replace/tension V-belt (
Page 36
).
4.
Belt slipping/pulleys misaligned.
4.
Tension/replace belt; ensure pulleys are aligned.
5.
Plug/receptacle at fault.
5.
Test for good contacts/correct wiring.
6.
Pulley/sprocket slipping on shaft.
6.
Tighten/replace loose pulley/shaft.
7.
Motor overheated, tripping machine
circuit breaker.
7.
Clean motor/let cool, and reduce workload. Reset
breaker.
8.
Run capacitor at fault.
8.
Test/repair/replace.
9.
Motor bearings at fault.
9.
Test/repair/replace.
10.
Centrifugal switch/contact points
at fault.
10.
Adjust centrifugal switch/clean contact points.
Replace either if at fault.
11.
Motor at fault.
11.
Test/repair/replace.
