Troubleshooting Guide
Power Feed Variable Feed Rate Switch Test
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6-16 60HDdoc081208 Troubleshooting Guide
6.7 Power Feed Variable Feed Rate Switch Test
With the feed rate dial switch all the way down, move the shaft of the dial back and forth
to see if there is a jerky response. Turn the dial and move the shaft back and forth again.
Repeat several times. If the jerkiness occurs at the same location on the dial several
times, you need to replace the variable speed switch.
6.8 Power Feed Preliminary Test
This test will determine if the problem is a mechanical or electrical.
1. Remove the drive belt from the power feed drive pulley.
2. Turn the key switch to the ACC position. Put the carriage forward/reverse switch into the
forward position and turn the feed rate dial through all speeds. If the power feed motor
runs properly at all speeds, the problem is a mechanical one instead of an electrical one.
6.9 Power Feed Mechanical Test
1. Remove the weight from the track rollers. They should turn smoothly and easily with very
little play.
2. Make sure the middle track cover is not bent or touching the top rail.
3. Make sure the middle track oiler is free of sawdust buildup.
4. Make sure the power feed chain is not stiff from rust. Also make sure the chain is not too
tight.
5. Check the power feed shaft. Visually inspect the bearings. The shaft should move neither
in or out nor side to side.
6. Make sure there is no sap or rust on the rails.
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