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TO PREVENT INJURY TO YOURSELF or damage to the mortiser, turn the switch to the OFF position and unplug the
power cord from the electrical receptacle before making any adjustments.
PROBLEM
LIKELY CAUSE(S)
Motor does not
1. Defective switch
start or does not
2. Defective capacitor
come up to full
speed
3. Low line voltage
4. Defective motor
Motor stalls or
1. Circuit overload
circuit breakers
open frequently
2. Low line voltage
3. Motor overload
4. Incorrect fuses on circuit breakers
5. Short circuit in motor; loose
Motor running
1. Restricted air circulation due to dust
too hot
2. Motor overload
Drill bit stalls
1. Drill bit is not securely tightened in
or slips
Drill bit or material
1. Chips not exiting out of drill hole.
smokes or burns
2. Dull drill bit.
Excessive drill bit
1. Bent drill bit.
runout or wobble
2. Drill bit not properly installed in chuck.
TROUBLESHOOTING GUIDE
connections or worn insulation on
lead wires.
accumulation.
chuck.
SOLUTION
1. Have switch replaced.
2. Have capacitor replaced.
3. Correct low line voltage condition. If machine is
plugged into an extension cord, disconnect and plug
directly into wall outlet.
4. Have motor replaced.
NOTE: 2, 3, and 4 must be done by a qualified service
technician; Consult Steel City Tool Works service.
1. Reduce circuit load (turn off other appliances).
2. Correct low line voltage condition. Check line voltage
with a multi-meter. If mortiser is plugged into an
extension cord, unplug mortiser from extension cord
and plug mortiser directly to wall outlet.
3. Reduce load on motor, slow down feed rate.
4. Have correct fuses on circuit breakers installed by a
qualified electrician.
5. Inspect terminals in motor for damaged insulation and
shorted wires and have them replaced. Check all
power lead connections.
1. Clean dust and restore normal air circulation around
motor.
2. Reduce load on motor, slow down feed rate.
1. Install drill bit properly. See ASSEMBLING CHISEL AND
BIT in ASSEMBLY INSTRUCTIONS.
1. Retract drill bit frequently during drilling operation to
clear chips from hole.
2. Replace or sharpen drill bit.
1. Replace with a straight or new drill bit.
2. Install drill bit properly. See ASSEMBLING CHISEL
AND BIT in ASSEMBLY INSTRUCTIONS.
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