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Paccar · Cooling System
D84-1002-071939
In stock · ships from Knoxville
This is an OEM accessory drive belt for the Paccar MX-13 diesel engine, commonly used in Peterbilt 384 trucks.
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Fitment based on inventory title and Paccar parts catalog listing for MX Engine. Verify engine configuration and belt length before purchase.
Part data verified against 2 catalog sources
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It is a 7-rib serpentine (poly-V) belt with a 1939 mm effective length, responsible for driving the alternator, air conditioning compressor, and other front-end accessories. Replacement is typically needed when the belt shows cracking, glazing, or squealing, or as part of scheduled preventive maintenance around 100,000–150,000 miles. Using the correct genuine Paccar belt ensures proper tension and durability.
Part Number: D84-1002-071939
ACCESSORY BELT ALT PETERBILT 384
Vendor: Peterbilt of Knoxville
Dealer: Knox Trailers
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