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(888) 312-8812 Login SignupSquealing at startup or cracks across the ribs of the old belt are the signal to fit the Cummins V-Ribbed Belt. Because one belt drives the alternator, water pump, and fan, a slipping belt shows up in charging and cooling at once. As it ages, heat and flexing harden the rubber and glaze the rib faces until grip falls off. The Cummins 3978284 brings full grip back to the drive before an old belt fails on the road.
BELT-V RIBBED
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