Cat C15 — Belt Diagram

To understand the diagram, you have to know the characters the belt interacts with. The belt is the muscle; these components are the organs:

While there are slight variations between the C15 ACERT and the classic C15 (specifically regarding the placement of the A/C compressor), the narrative of the routing is almost universal.

[ Fan Hub ] (Back) | | (Smooth side) | [ Water Pump ] (Back) | | (Grooved side) | [ Alt ] ---+--- [ Crank ] (Groove) (Groove) \ / \ / [ Tensioner ] cat c15 belt diagram

The tensioner snaps back. The story ends with a tight, humming band of rubber, ready to transfer 600 horsepower worth of rotational energy to keep the rig alive for another million miles.

If your C15 belt is failing, you may notice: To understand the diagram, you have to know

The is a powerhouse of the trucking industry, but its complex accessory drive system requires a precise belt diagram for proper maintenance. On most C15 configurations, such as the ACERT twin-turbo models, the system typically uses a dual-belt setup: a primary 8-rib serpentine belt for main accessories and a secondary 6-rib belt specifically for the A/C compressor . Cat C15 Belt Routing Overview

: Continues down under the lower stationary idler , up and over the automatic tensioner pulley , then down under the crankshaft dampener pulley before returning to the fan hub. 6-Rib Upper (AC) Belt Routing : Starting Point : Outer grooves of the fan hub . The story ends with a tight, humming band

Never guess. Here is where to find the official routing guide for your specific C15:

for serpentine conversion kits or ATL Diesel for replacement tensioners.