Overview – BELT (V-BELT) C3967103
C3967103 is the V-belt used on CUMMINS 6CT and 6BT engines to drive the fan, alternator and air conditioning compressor from the crankshaft. We can supply this belt as well as the related family numbers listed below, in stock or available on order – welcome to enquire by part number.
Parts Characteristics
The belt is built to the original length, width and V-profile, with the rubber compound and cord reinforcement matched to the CUMMINS pulley set. The sides of the belt transmit power through the pulley grooves without slipping, and the cover fabric resists oil and heat. As an OEM-spec belt, it fits the original tensioner travel without bracket changes.
Applicable Models & Applications
This V-belt is used on CUMMINS 6CT and 6BT engines where the accessory drive pulley layout matches the original specification, including truck and industrial builds with the C3967103 belt. The family references C3979425, C4930899 and C4948085 cover the same drive duty on adjacent engine builds. Confirm the belt length, width and profile against the belt removed from your engine before ordering.
Maintenance & Replacement
A worn V-belt shows up as squealing on start-up, glazed sides, cracking and loose drive to the accessories. Inspect the belt for wear, oil contamination and frayed edges during regular service. When replacing, release the tensioner, remove the old belt, and route the new belt over the pulleys exactly as the old one, then apply the original tension. Rotate the engine by hand to confirm the belt seats in every groove.
Price Reference (USD)
The reference price for this BELT (V-BELT) (C3967103) is approximately USD 15 – 70 per unit depending on grade, quantity and shipping destination. This is a planning estimate only – confirm current pricing and availability with our sales team before ordering.
Also in the BELT (V-BELT) Series
C3979425, C4930899, C4948085 and more.
Value & Service
A belt with the wrong length will not stay in the pulley grooves, so we verify C3967103 against the original CUMMINS length and profile before dispatch. We stock the belt together with the tensioner and pulley kit, and they can ship in one tracked order. Our team will confirm the correct belt for your engine before you buy.
Racer Machinery is a dedicated construction-machinery parts supplier – send us your part number and engine model, and we will confirm fitment, price and lead time for this V-belt and related CUMMINS drive components.
