Section 7: Service; Troubleshooting - Grizzly G0938 Owner's Manual

18" scroll saw w/stand
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SECTION 7: SERVICE

Review the troubleshooting and procedures in this section if a problem develops with your machine. If you
need replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663.
Note: Please gather the serial number and manufacture date of your machine before calling.
Symptom
Possible Cause
Machine does not
1. Incorrect power supply voltage/circuit size.
start, or power
2. Motor speed potentiometer at fault.
supply breaker
3. Power supply circuit breaker tripped or fuse
immediately trips
blown.
after startup.
4. Wiring broken, disconnected, or corroded.
5. Motor brushes worn out.
6. ON/OFF switch at fault.
7. Circuit board at fault.
8. Motor or motor bearings at fault.
Machine stalls or is
1. Dull blade.
underpowered.
2 Workpiece material unsuitable for machine.
3. Machine undersized for task.
4. Motor circuit board at fault.
5. Motor speed potentiometer at fault.
6. Motor brushes worn out.
7. Motor overheated.
8. Extension cord too long.
9. Motor or motor bearings at fault.
Machine has
1. Motor or component loose.
vibration or noisy
operation.
2. Blade at fault.
3. Motor mount loose/broken.
4. Motor bearings at fault.
Blade will not stay
1. Blade not tensioned correctly.
on layout line.
2. Too much pressure applied to workpiece.
3. Blade holders not aligned correctly.
Excessive blade
1. Blade not tensioned correctly.
breakage.
2. Not using relief cuts when cutting tight
curves; twisting blade.
3. Wrong blade for operation.
4. Too much pressure on blade.
Model G0938 (Mfd. Since 03/21)

Troubleshooting

Possible Solution
1. Ensure correct power supply voltage/circuit size.
2. Test/replace if at fault.
3. Ensure circuit is free of shorts. Reset circuit breaker
or replace fuse.
4. Fix broken wires or disconnected/corroded
connections.
5. Remove/replace brushes (Page 32).
6. Replace switch.
7. Inspect/replace if at fault.
8. Replace motor.
1. Sharpen/replace blade.
2. Only cut wood/ensure moisture if below 20%
(Page 20).
3. Use correct blade/reduce feed rate or depth of cut.
4. Inspect and replace if at fault.
5. Test and replace if at fault.
6. Replace motor brushes.
7. Clean motor, let cool, reduce workload.
8. Move machine closer to power supply; use shorter
extension cord.
9. Replace motor.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Replace warped/bent blade; resharpen dull blade.
3. Tighten/replace.
4. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
1. Properly tension blade (Page 21).
2. Reduce feed rate and pressure on workpiece.
3. Adjust blade holders so they are perpendicular
(Page 33).
1. Properly tension blade (Page 21).
2. Use relief cuts for tight turns; reduce feed rate; do
not twist blade.
3. Refer to Blade Selection Chart, and use correct
blade for operation (Page 24).
4. Reduce pressure on workpiece as it passes through
blade.
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