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Troubleshooting
Trouble Probable Cause Remedy
No incoming power. Check all plug connections.
Fuse blown, or circuit breaker tripped. Replace fuse, or reset circuit breaker.
Cord damaged. Replace cord.
Mortiser will not start.
Motor bad. Contact WMH technical service.
Extension cord too light or too long.
Replace with adequate size and
length cord.
Drill bit does not
come up to speed.
Low current. Contact a qualified electrician.
Mortiser vibrates
excessively.
Stand on uneven surface.
Machine should be placed on level
floor; use shims if necessary.
Noisy Operation. Auger contacting chisel.
Increase offset of auger in relation to
chisel. See page 9.
Chips not clearing from hole or auger.
Retract auger frequently to remove
chips. Make sure chisel slot opens
toward area already cut.
Dull auger. Resharpen, or replace auger.
Workpiece Burns.
Feeding auger into workpiece too
slowly.
Increase feed rate.
Auger sharpened incorrectly. Resharpen auger correctly (page 17).
Chuck jaws not tight. Tighten chuck jaws.
Bent auger. Replace auger.
Drill bit wanders.
Auger or chuck not installed properly. Reinstall the chuck, or auger properly.
Wood splinters on the
underside.
No backing board used.
Place a scrap board underneath the
workpiece to prevent splintering.
Workpiece not clamped properly,
pinching the auger.
Support or clamp workpiece firmly.
Excessive feed rate. Decrease feed rate.
Drill bit binds in
workpiece.
Chuck jaws not tight. Tighten chuck jaws.
Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call
1-800-274-6848 between 7:30 a.m. and 6:00 p.m. (CST), Monday through Friday. Having the Model
Number and Serial Number of your machine available when you call will allow us to serve you quickly and
accurately.