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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 pulley spacers.
  • 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.
Last modified: Mon, 17 Jan 2005


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