Check Belt Tensioner Spring Tension and Belt Wear

Belt drive systems equipped with automatic (spring) belt tensioners cannot be adjusted or repaired. The automatic belt tensioner is designed to maintain proper belt tension over the life of the belt. If tensioner spring tension is not within specification, replace tensioner assembly.

TX,80,DY2072 -19-29MAR00-1/2

Checking Belt Wear

The belt tensioner is designed to operate within the limit of arm movement provided by the cast stops (A and B) when correct belt length and geometry is used.

1. Visually inspect cast stops (A and B) on belt tensioner assembly.

If the tensioner stop on swing arm (A) is hitting the fixed stop (B), check mounting brackets (alternator, belt tensioner, idler pulley, etc.) and the belt length. Replace belt as necessary.

2. Check to make sure belt is tracking correctly on the pulley.

3. With belt off pulley, pull tensioner through working range. There should be smooth, constant tension on arm.

T104879


A-Swing Arm Stop
B-Fixed Stop

TX,80,DY2072 -19-29MAR00-2/2