Troubleshooting The Jwl-1440Vs Lathe - Jet JWL-1440VS Operating Instructions And Parts Manual

13.0 Troubleshooting the JWL-1440VS Lathe

Table 3
Symptom
Motor fails to develop
full power.
Motor or spindle stalls
or will not start.
Excessive vibration.
Tools tend to grab or
dig in.
Headstock moves
when applying
pressure with
Tailstock.
Tailstock moves when
applying pressure.
Possible Cause
Power line overloaded.
Undersized wires in supply system, or
extension cord is too long.
Running capacitor is bad.
Worn motor.
Excessive cut.
Worn or broken belt.
Improper cooling of motor.
Starting or Running capacitor is bad.
Centrifugal switch is bad.
Worn spindle bearings.
Worn motor.
Workpiece warped, out of round, has
major flaw, was improperly prepared for
turning, or RPM is set too high.
Worn spindle bearings.
Worn drive belt.
Motor mount bolts are loose.
Lathe on uneven surface.
Dull tools.
Tool rest set too low.
Tool rest set too far from workpiece.
Improper tool being used.
Locking handle not tight.
Excessive pressure being applied by
tailstock.
Cam lock nut needs adjusting.
Excessive pressure being applied by
tailstock.
Lathe bed and tailstock mating surfaces
are greasy or oily.
Correction
Correct overload condition.
Increase supply wire size.
Replace running capacitor.
Replace motor.
Reduce depth of cut.
Replace belt.
Blow out sawdust from motor housing
fan.
Replace capacitor.
Replace centrifugal switch.
Replace bearings.
Replace motor.
Correct problem by planing or sawing
workpiece, or discard entirely and use
new workpiece. Reduce RPM.
Replace spindle bearings.
Replace drive belt.
Tighten bolts.
Adjust leveling feet.
Keep tools sharp.
Reposition tool rest height.
Reposition tool rest closer to workpiece.
Use correct tool for operation.
Tighten handle.
Slide headstock to left end, lock firmly,
then apply pressure to workpiece with
tailstock. Apply only sufficient force with
tailstock to hold workpiece securely in
place.
Tighten cam lock nut.
Slide tailstock to right side of lathe
against the stop. Move headstock into
position
workpiece with tailstock.
Remove tailstock and clean surfaces
with a cleaner/degreaser. Re-apply light
coat of oil to lathe bed surface.
22
and apply pressure to