CATERPILLAR-C11-C13-BELT-TENSIONER

Fitted to Caterpillar C11 and C13 engines, this belt tensioner (211-7895) is the spring-loaded assembly that keeps the accessory drive belt at correct tension as the belt stretches over its service life. A worn tensioner lets the belt slip under load, which shows up first as a squeal on start-up and eventually as alternator or water pump underperformance. Replacing it before that point is cheaper than chasing the symptoms afterward. Orange.net.za dispatches across South Africa.