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Detroit Diesel · Cooling System
A4722001670
In stock · ships from Knoxville
This is a belt tensioner kit for Detroit Diesel DD13 and DD15 heavy-duty truck engines.
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Verified fitment for 3 applications
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All confirmed applications for this part number.
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Likely fits other Freightliner and Western Star models with DD13/DD15 engines; verify with OEM.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 13 of 13.
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It maintains proper tension on the serpentine belt that drives accessories like the alternator, water pump, and air compressor. A worn tensioner can cause belt slippage, noise, and premature belt failure, so it's commonly replaced during belt service or when the tensioner pulley bearing shows wear. The kit includes the tensioner assembly, two locking pins, a screw, and installation instructions to simplify the job.
Part Number: A4722001670
BELT TENSIONER
Vendor: Premier Freightliner
Dealer: KP Services Crossville
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