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Model W1873/W1874 (For Machines Mfd. Since 10/20)
SE
RV
IC
E
Troubleshooting
Motor.&.Electrical
The following troubleshooting tables cover common problems that may occur with this machine. If you
need replacement parts or additional troubleshooting help, contact our Technical Support.
Note:
Before contacting Tech Support, find the machine serial number and manufacture date, and if
available, your original purchase receipt. This information is required to properly assist you.
PROBLEM
POSSIBLE.CAUSE
CORRECTIVE.ACTION
Machine does not
start, or power
supply breaker
trips immediately
after startup.
1. STOP button depressed/at fault.
2. Incorrect power supply voltage or circuit size.
3. Thermal overload relay has tripped.
4. Power supply circuit breaker tripped or fuse
blown.
5. Motor wires connected incorrectly.
6. Wiring open/has high resistance.
7. START button switch at fault.
8. Start capacitor at fault.
9. Thermal overload relay has tripped.
10. Contactor not energized; has poor contacts.
11. Centrifugal switch/contact points at fault.
12. Motor at fault.
1. Rotate button head to reset; replace if at fault.
2. Ensure correct power supply voltage and circuit
size.
3. Reset; adjust trip load dial if necessary; replace.
4. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
5. Correct motor wiring connections.
6. Check/fix broken, disconnected, or corroded wires.
7. Replace switch.
8. Test/replace if at fault.
9. Reset; adjust trip load dial if necessary; replace.
10. Test all legs for power/replace.
11. Adjust/replace centrifugal switch/contact points if
available.
12. Test/repair/replace.
Machine stalls or
is underpowered.
1. Machine undersized for task.
2. Workpiece not suitable for machine.
3. Motor overheated, causing thermal overload
to trip.
4. Belt(s) slipping; oil/grease on belt(s).
5. Dull knives/inserts.
6. Dust collection ducting problem.
7. Motor wired incorrectly.
8. Run capacitor at fault.
9. Pulley slipping on shaft.
10. Contactor not energized/has poor contacts.
11. Centrifugal switch/contact points at fault.
12. Motor bearings at fault.
1. Reduce feed rate/depth of cut.
2. Only cut wood/ensure moisture is below 20%.
3. Allow motor to cool, reset overload if necessary,
and reduce depth of cut.
4. Clean/tension/replace belt (
Page.39
).
5. Sharpen/replace knives (
Page. 29
), or replace
inserts (
Page.32
).
6. Clear blockages, seal leaks, use smooth wall duct,
eliminate bends, close other branches.
7. Wire motor correctly.
8. Test/repair/replace.
9. Tighten loose pulley; replace pulley/shaft if dam-
aged.
10. Test all legs for power/replace.
11. Adjust/replace centrifugal switch/contact points if
available.
12. Test/repair/replace.
Machine has
vibration or noisy
operation.
1. Motor or component loose.
2. V-belt worn, loose, or slapping cover.
3. Pulley loose.
4. Plastic chip deflector hitting knives.
5. Motor fan rubbing on fan cover.
6. Knives/gibs at fault.
7. Cutterhead bearings at fault.
8. Motor bearings at fault.
1. Inspect/tighten loose bolts/nuts; replace damaged
components.
2. Tension/replace belt (
Page.39
).
3. Re-align/replace shaft, pulley set screw, and key.
4. Adjust chip deflector (
Page.45
); replace if neces-
sary.
5. Fix/replace fan cover; replace loose/damaged fan.
6. Sharpen/replace knives; set knife alignment/height
correctly (
Page.29
).
7. Replace bearing(s).
8. Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.