Tensioner Dayco 89219
Bolt is Cummins 3900679
NAPA Belt No's
080830 1992 with AC
080635 1992 with out AC
080816 1990 with AC
080645 1990 with out AC
the 1990 are non IC trucks and the 1992 are the IC trucks.
NAPA sells the Fleet Runner belt. These are green in color and are to last 250,000 miles
Just add HD after the part number. I have them installed on the bus fleet cuz the black belts only last about 3 years.
The non AC belts are good for a spare. If you loose the AC compressor on a trip, then you must install a new compressor, or a shorter belt. I carry the shorter belt with me. I always change the AC belt LONG befor it breaks. You never know when your compressor will lock
