Powermatic 74A, Instruction Manual & Parts List

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15
TROUBLE-SHOOTING for 74A Table Saw
PROBLEM POSSIBLE CAUSE SOLUTION
Excessive Vibration. 1. Tilt or raising clamp knobs not tightened. 1. Tighten knobs.
2. Blade out of balance. 2. Change blade.
3. Bad motor. 3. Replace motor.
4. Loose arbor or motor sheave. 4. Tighten set screws.
Cuts out-of-square when 1. Mitre gauge out of adjustment. 1. Reset stops and pointer.
crosscutting. 2. Mitre slot misaligned. 2. Realign table.
Motor stalls or workpiece 1. Excessive feed. 1. Reduce feed.
binds or burns. 2. Bad motor. 2. Replace motor.
3. Dull or incorrect blade. 3. Replace blade.
4. Mitre slot misaligned. 4. Realign mitre slot.
5. Fence misalignment. 5. Realign fence.
Cuts not true at 90 or 45 1. Stop screws not set properly. 1. Readjust stop screws.
degrees.
Tilt or saw raising 1. Lock knob not released. 1. Loosen lock knob.
handwheels difficult to turn. 2. Worm and worm gear segment caked 2. Clean and re-grease.
with sawdust and pitch.
3. Worm and worm gear segment out of
3. Realign worm and worm
alignment. gear segment.
Motor overheats. 1. Motor overloaded. 1. Correct overload condition
such as reducing the
feed rate.
2. Improper cooling of motor. 2. Clean sawdust from fan
and duct areas of motor.
Motor starts slowly or fails 1. Low voltage. 1. Request voltage check
to come up to full speed. from power company and
correct low voltage
condition.
2. Centrifugal switch not operating. 2. Replace switch.
3. Bad motor. 3. Replace motor.
Motor fails to develop full 1. Power line overloaded. 1. Correct overload condition.
power. 2. Undersize wires in supply system. 2. Increase supply wire size.
3. Low voltage. 3. Request voltage check
from power company and
correct condition.
4. Bad motor. 4. Replace motor.