Keep a spare belt in your side box, a copy of the diagram taped to the inside of the hood, and always replace the tensioner every 2nd belt change.
The Caterpillar C15 is a 15.2-liter, inline 6-cylinder diesel engine known for its durability and power. However, like any engine, it relies on a single, critical component for auxiliary power: the . If that belt snaps or comes off, your truck is going nowhere.
: Most heavy-duty trucks have a belt routing sticker located on the underside of the hood or the radiator shroud . cat c15 belt diagram
The routing path is critical to ensure that the water pump , alternator, and fan hub rotate in the correct direction with sufficient tension. Typical Rib Count Components Driven Alternator, Water Pump, Fan Hub, Crankshaft Dampener A/C Drive Belt Air Conditioning Compressor, Fan Hub (Outer Grooves) Common 8-Rib Routing Path Start from the inner grooves of the fan hub .
The diagram tells a story of compromise: How to drive four different components at different speeds (RPMs) using one single belt. Keep a spare belt in your side box,
For a Caterpillar C15 engine, the belt routing typically follows a dual-belt configuration consisting of a main serpentine belt and an auxiliary air conditioning belt. Because C15 engines are used in various truck chassis (such as Peterbilt, Kenworth, and Freightliner), specific routing and belt part numbers are often determined by the vehicle manufacturer rather than Caterpillar. Standard 8/6-Rib Belt Configuration
for serpentine conversion kits or ATL Diesel for replacement tensioners. If that belt snaps or comes off, your truck is going nowhere
Modern C15 setups, such as those found on the ACERT models, usually feature an 8-rib main belt and a 6-rib auxiliary belt. : Starting Point : Inner grooves of the fan hub .
Before & After Photos
