DESCRIPTION
Many manufacturers are using a single ("serpentine" or "V" ribbed) belt system to drive components normally requiring multiple "V" belts. The serpentine belt system incorporates a tensioner which makes it possible to rigidly mount belt-driven components previously requiring individual adjustment. The serpentine belt tensioner controls belt tension over a wide range of belt lengths. The tensioner cannot compensate for extreme belt lengths. Poor tension control or possible tensioner damage can result from excessive length belts.
INSPECTION
Check belt for fraying. If fraying is noticed, ensure both belt and tensioner are aligned properly. (Scheme 1) Automatic tensioners have a belt-wear indicator. (Scheme 2) If tensioner reaches its travel limit, indicated by marks on tensioner, belt should be replaced. If a whining or grinding noise is heard from tensioner or idler pulley, check for possible bearing failure. Belts must be properly adjusted at all times. Loose belts will result in slippage which may cause a noise complaint or improper accessory operation. Overtightening belts can place severe load on bearings.
