BELTS

Belts For Peterbilt Trucks

Drive belts on a heavy-duty diesel engine keep critical systems running — from the alternator and power steering pump to the water pump and air conditioning compressor. A failed belt can leave you sidelined, which makes scheduled inspection and timely replacement essential preventive maintenance. We carry serpentine belts, V-belts, and multi-rib belts in the sizes and specifications needed for Peterbilt trucks and PACCAR engines.

Frequently asked questions about belts

How often should drive belts be replaced on a Peterbilt?

Most heavy-duty truck belt manufacturers recommend inspection at every PM service and replacement at 100,000–150,000 miles, or sooner if wear is detected. Even if a belt looks intact, glazing, cracking, or fraying are signs it should come out before it fails on the road. Belts are inexpensive compared to the tow bill and downtime from an unexpected roadside failure.

What are the signs that a belt is failing on a diesel truck?

Common signs include squealing or chirping noises from the engine compartment, especially on cold starts or during load changes. Glazed or cracked belt surfaces are red flags during inspection. Charging problems or overheating can both be traced to belt slippage on the alternator or water pump drive. A belt that repeatedly jumps off the pulleys points to a misaligned pulley or failing tensioner, not just belt wear.

Can I replace just the belt, or should I also replace the tensioner and pulleys?

It's good practice to inspect tensioners and idler pulleys whenever a belt is replaced. A worn tensioner with weak spring tension will accelerate wear on a new belt. Seized or noisy pulleys can damage the belt and eventually cause it to leave the drive system. If the truck has significant mileage and the tensioner hasn't been replaced recently, doing it at the same time as the belt is cost-effective preventive maintenance.

Other parts you might need

Shop belts, tensioners & pulleys for Peterbilt trucks