Powermatic 31A operating instructions Troubleshooting, Replacement Parts, Probable Cause Remedy

Troubleshooting

Trouble

Sander will not start.

Abrasive belt won’t track properly.

Abrasive disc comes free of aluminum disc.

Abrasive belt slips or stalls on application of pressure.

Aluminum disc stalls.

Excessive abrasive belt replacement.

Belt arm won’t index.

Probable Cause	Remedy
Disconnected from power source.	Check connection to source.
	Make sure power source matches
Incorrect voltage.	voltage of sander, as shown on motor
	name plate.
Switch is not activating.	Repair or replace switch.
Motor is faulty.	Repair or replace motor.
Platen is shifted or worn.	Raise platen to 1/32” beyond the apex
	of the drum. See page 15.
Belt is stretched unevenly.	Replace belt.
Drum is worn.	Replace drum.
	Clean adhesive off aluminum disc,
Improper bond.	then re-apply adhesive and re-mount
	abrasive disc.
Abrasive belt tension is inadequate.	Tighten abrasive belt (page 11).
Excessive pressure.	Reduce pressure against belt.
Drive belt is loose.	Properly tension drive belt (page 10).
Drive belt is loose.	Properly tension drive belt (page 10).
Disc shaft key is missing.	Replace key.
Using too much pressure when	Reduce pressure against belt.
sanding.
Not using full width of belt.	Stroke across full width of belt to
	disperse wear.
Index pin is stuck.	Remove arm and free index pin.
Broken spring.	Remove arm and replace spring.

Replacement Parts

Replacement parts are listed on the following pages. To order parts or reach our service department, call 1-800-274-6848, Monday through Friday (see our website for business hours, www.powermatic.com). Having the Model Number and Serial Number of your machine available when you call will allow us to serve you quickly and accurately.

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