Check and Adjust Cooling Fan V-Belt

1. NOTE: The V-belt will slip if it does not have the proper tension. This will prevent the alternator from generating sufficient power. Also, the engine will overheat due to the engine coolant pump pulley slipping.

   Check and adjust the V-belt tension (deflection) as follows:

2. Check the tension in V-Belt by using Belt tension checking gauge (A).

3. 
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   PY22080-UN-09FEB15

   
   PY22081-UN-09FEB15

   A - Belt Tension Checking Gauge

   B - Fan Belt Mounting Pulley

   C - V-Belt

   D - Adjusting Bolt

   E - Alternator

   F - Pry Bar

   G - Position G

   H - Position H

   Tension in belt should be as per specification.

   NOTE: A “Used V-Belt” refers to a V-belt which has been used on a running engine for five minutes or more.

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4. If necessary, adjust the V-belt tension. Loosen the adjusting bolt and related bolts and/or nuts, then move the alternator with a pry bar to tighten the V-belt to the desired tension. Then tighten the adjusting bolts and/or nuts.

5. Tighten the V-belt to the proper tension. There must be clearance between the V-belt and the bottom of the pulley groove (G). If there is no clearance between the V-belt and the bottom of the pulley groove (H), replace the V-belt.

6. Check the V-belt for cracks, oil or wear. If any of these conditions exist, replace the V-belt.

7. Install the new V-belt. Check the tension using Belt tension checking gauge as per specification.

8. After adjusting, run the engine for 5 minutes or more. Check the tension again using the Belt tension checking gauge as per specifications V-Belt Tension for a used V-belt.

Item	Measurement	Specification
V-Belt Tension	Tension	401 – 535 N (90 —120.2 lb)