Booyah45828
Senior Member
Yeah, most vehicles that use air brakes power the compressor by the gear train on the engine. A few, like ours, power it through a belt.
I'd stop at your bus first, write down how many belts you need and what they drive, then head to the napa store with that info. If you're replacing one, I suggest that you replace them all.
Sometimes the store will have many different options depending on the configuration, so you might have to buy and try a dozen belts to get the 4-5 that you need. Then you return the unused ones.
