Adjusting V-Belt Tension
- 3. Arrange spacers between pulley halves as needed. The belt tension
should be so adjusted, by adding or removing spacers between the two
pulley halves, that the belt will yield by about 15-20 mm (5/8 -
3/4in) under light thumb pressure. Removal o|.ipacers increases the
belt tension, addition of spacers decreases the tension (see
Fig. 72). If the belt has streched or worn to such extent that only
one spacer remains between the pulleys at correct belt tension, it
should be replaced since the condition will result in insufficient
cooling due to decreased impeller speeds. In addition, it should be
noted that the belt does not ride at the pulley root, that is, on the
- 4. Mount outer pulley half.
- 5. Spacers not inserted between the two pulley halves should be
placed onto the shaft between the outer pulley half and the nut so
that all spacers remain on the pulley hub.
- 6. Tighten pulley retaining nut. Loose pulley halves will quickly
become defective in their seats and also cause a rapid V-belt
wear. Damaged pulley halves must be replaced.