Accessory Drive

The PAI Industries 680370 Accessory Drive Assembly is engineered for Detroit Diesel Series 60 12.7L engines, replacing the OEM 23523996 / R23523996. Featuring a 34-tooth helical drive gear and a 2-groove pulley, this drive delivers precision accessory drive performance. With rugged construction and engineered for OEM fit, it ensures reliable power transfer to alternator, water pump, and A/C compressor. Built in ISO-certified U.S. facilities, backed by a 2-year unlimited mileage warranty, and stocked by Wofford Truck Parts.

Pai Industries Part No: 680370

$1,133.74

Specifications

The PAI 680370 Accessory Drive Assembly (OEM Ref: 23523996 / R23523996) is a heavy-duty replacement unit for Detroit Diesel Series 60 (12.7L) engines. It includes a 34-tooth helical drive gear and a 2-groove pulley (as opposed to Poly-V style in some variants), designed for OEM compatibility and durable performance. This assembly ensures correct accessory drive alignment, consistent belt engagement, and reliable service in demanding engine environments. Weighing approximately 14.6-14.8 lbs, it is built in certified U.S. manufacturing plants under strict quality standards. The part is backed by PAI’s warranty and supplied by Wofford Truck Parts as an OEM-quality solution for fleet, repair, or rebuild applications. Proper installation ensures reduced wear, correct drive tension, and long component life.

Weight

14.95

Compatibility

Freightliner – FLD, Century, Columbia, Coronado, Argosy (1987–2011)

Kenworth – T600, T800, W900 (1987–2011)

Peterbilt – 377, 378, 379, 386, 388 (1987–2011)

Western Star – 4700, 4900 (1990s–2011)

Sterling – Acterra, A-Line (late 1990s–2010)

International/Navistar – selected line-haul or transit models using Series 60 (1987–2011)

Bus / Coach / RV / Specialty – various units powered by the 12.7L Series 60 engine in that timeframe

Alternative Part Numbers

Detroit Diesel 23523996
R23523996
PAI 680370

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Accessory Drive - 680370 $1,133.74