Automatic Belt Tension Adjuster

1. Visually check the oil seals for leaks, and rod ends for abnormal wear and scratches. If necessary, replace the automatic belt tension adjuster assembly.
   NOTE: Slight trace of oil at rod's oil seal does not indicate a problem.
2. Check that the adjuster rod does not move when a pressure of 294 N (30 kgf, 66 lb) is applied to it. This is to check adjuster rod stiffness.
3. If the adjuster rod is not stiff and moves freely when applying 294 N (30 kgf, 66 lb), check it using the following procedures:
   1. Slowly press the adjuster rod down to the end surface of the cylinder. Repeat this operation two to three times.
   2. With the adjuster rod moved all the way up, apply a pressure of 294 N (30 kgf, 66 lb) to it. Check the adjuster rod stiffness.
   3. If the adjuster rod is not stiff and moves down, replace the automatic belt tension adjuster assembly with a new one.
   CAUTION:

   • Always use a vertical type pressing tool to move the adjuster rod down.
   • Do not use a lateral type vise.
   • Push the adjuster rod vertically.
   • Press-in the push adjuster rod gradually taking more than three minutes.
   • Do not allow press pressure to exceed 9,807 N (1,000 kgf, 2,205 lb).
   • Press the adjuster rod as far as the end surface of the cylinder. Do not press the adjuster rod into cylinder. Doing so may damage the cylinder.
4. Measure the amount of rod protrusion beyond the body. If it is not within specifications, replace with a new one.

Amount of rod protrusion H: 

5.7+/-0.5 mm (0.224+/-0.020 in) 

Fig 1: Measuring Amount Of Rod Protrusion

Courtesy of SUBARU OF AMERICA, INC.