Inspect Alternator/Fan Belt Tensioner

1. NOTE: Pulley and spring tensioner are not serviceable.

   
   P12693-UN-25NOV03

   A - Belt

   Remove belt (A). (See procedure in this section.)

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2. NOTE: A belt tension gauge will not give an accurate measurement of the belt tension when automatic belt tensioner is used. Measure tensioner spring tension using a torque wrench and procedure outlined below.

   
   P12694-UN-25NOV03

   A - Swing Arm Mark

   B - Tensioner Mounting Base Mark

   Put a mark (A) on swing arm of tensioner as shown.

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3. Measure 21 mm (0.83 in.) from (A) and put a mark (B) on tensioner mounting base.

4. 
   P12695-UN-25NOV03

   A - Swing Arm Mark

   B - Tensioner Mounting Base Mark

   Rotate the swing arm using a torque wrench until marks (A and B) are aligned.

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5. Record torque wrench measurement and compare with specification. Replace belt tensioner assembly if recorded measurement is below specification.

   Item	Measurement	Specification
   Swing Arm Spring Tension	Torque	18—22 N˙m (159—195 lb-in.)

6. Install belt. (See procedure in this section.)