Drive Belt: Testing and Inspection

INSPECTION
INSPECT DRIVE BELT





a. Visually check the drive belt for excessive wear, frayed cords etc.
If any defect has been found, replace the drive belt.

HINT: Cracks on the rib side of a drive belt are considered acceptable.

If the missing chunks from the ribs are found on the drive belt, it should be replaced.





b. Using a belt tension gauge, measure the belt tension.
Belt tension gauge: DENSO BTG-20 (95506-0020) Borroughs No. BT-33-73F
Drive belt tension:
New belt: 150 - 185 lbs.
Used belt: 95 - 135 lbs.
If the belt defection is not as specified, adjust it.





HINT:
^ "New belt" refers to a belt that has been used less than 5 minutes on a running engine.
^ "Used belt" refers to a belt that has been used on a running engine for 5 minutes or more.
^ After installing a belt, check that it fits properly in the ribbed grooves.
^ Check with your hand to confirm that the belt has not slipped out of the groove on the bottom of the pulley.
^ After installing a new belt, run the engine for about 5 minutes and recheck the belt tension.