Troubleshooting Guide
Motor and Drive Pulleys Alignment
4
4-10
HDSdoc041118
Troubleshooting Guide
4.5
Motor and Drive Pulleys Alignment
1.
Install the drive belt.
2.
Use a straight edge to align the engine/motor pulley to the drive pulley.
3.
Check front-to-back movement of the engine does not exceed 6,5 mm (1/4"). Tighten the
motor mount U-bolts if necessary.
4.
Engage the clutch handle and adjust the drive belt tension to 12-13 mm (7/16") deflection
with 5 kG of force.
5.
Recheck the pulley alignment and engine squareness with the clutch handle engaged.
Adjust if necessary.
6.
Adjust the drive belt support to 8 mm from the belt while engaged.
4.6
Power Feed Variable Speed 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.
4.7
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 (#2) 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.
4.8
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.
