South Bend Tools
For Machines Mfd. Since 7/21
Model SB1123
-69-
TROUBLESHOOTING
Machine has
vibration or noisy
operation.
1.
Motor or component loose.
1.
Replace damaged or missing bolts/nuts or tighten if
loose.
2.
Blade weld at fault/teeth broken.
2.
Replace blade (Page 43).
3.
Blade at fault.
3.
Replace warped/bent blade; resharpen dull blade.
4.
V-belt(s) worn, loose, pulleys
misaligned or belt slapping cover.
4.
Inspect/replace belts with a new matched set.
Realign pulleys if necessary (Page 63).
5.
Pulley loose.
5.
Secure pulley on shaft.
6.
Motor mount loose/broken.
6.
Tighten/replace.
7.
Motor fan rubbing on fan cover.
7.
Fix/replace fan cover; replace loose/damaged fan.
8.
Motor bearings at fault.
8.
Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
Symptom
Possible Cause
Possible Solution
Motor & Electrical (Cont.)
Blade or teeth
break/crack.
1.
Blade tension is incorrect.
1.
Adjust blade tension (Page 27).
2.
Blade is incorrect for application.
2.
Use correct blade for application (Page 38).
3.
Excessive feed rate/pressure.
3.
Reduce feed rate/pressure.
4.
Cutting corners too sharply.
4.
Use a wider arc on outside cuts, or use relief cuts to
make tight inside cuts.
5.
Blade is dull/weld at fault.
5.
Replace blade (Page 43).
6.
Blade is tracking incorrectly.
6.
Adjust blade tracking (Page 28).
7.
Blade guides/support bearings not
adjusted properly, allowing guides
to hit blade teeth.
7.
Adjust blade guides/support bearings properly, so
guides cannot contact teeth during operation (Page
29).
8.
Wheel worn or incorrectly installed.
8.
Replace or re-install wheel.
9.
Fence or miter slot out of alignment
with blade.
9.
Align miter slot and fence with blade (Page 35).
10.
Blade guide bearings at fault.
10.
Replace blade guide bearings.
Operating Machine
Symptom
Possible Cause
Possible Solution
Blade slows,
smokes, shows
overheating or
wear on one side.
1.
Blade contacting table insert.
1.
Adjust blade guides to eliminate any side pressure
(Page 30); properly align table (Page 32).
2.
Blade guides are worn or
misadjusted.
2.
Adjust upper blade guides as close to workpiece as
possible.
3.
Blade installed backwards.
3.
Check blade rotation. Re-install blade if necessary
(Page 43).
4.
Too much side pressure when
feeding workpiece.
4.
Feed workpiece straight into blade.
5.
Wheels are out of alignment.
5.
Adjust wheels to be coplanar (Page 63).
6.
Dull, bell-mouthed, or incorrect
blade.
6.
Replace blade (Page 43).
7.
Fence not parallel with blade.
7.
Adjust fence parallel with blade (Page 33).
8.
Table top surface is not parallel or
square to blade.
8.
Adjust/shim table/trunnion position until blade and
table are parallel and square (Page 32).
9.
V-belt loose or slipping.
9.
Tighten V-belt. Replace if worn or oily. (Page 57).
