3966840 Cummins Oil Pump For 6CT 6C ISC QSC Engiens

This gear-type lube oil pump was factory fitted on DCEC 6CT / 6CTA / 6CTAA 8.3L mechanical diesel engines. Designed for land-based heavy-duty continuous operation, it maintains stable lubricating oil pressure under high-temperature heavy loads. Fully drop-in interchangeable with 3415365, 3800828, 3948072 and other older generation oil pumps.

Specification:

✅ 220–300HP 6CT/6CTA overland heavy-duty trucks

✅ Land-based stationary generator sets
✅ Agricultural machinery powered by 6C8.3 power unit

Why Choose Us?

✅ 100% Genuine Parts: Directly supplied by DCEC with official certification

✅ Wholesale Discounts: Tiered pricing for bulk orders and long-term cooperation

✅ Professional Support: Free technical guidance from certified engineers

✅ Fast Global Delivery: 24h dispatch, worldwide shipping in 3-15 days

FAQ:
Q1: Can 3966840 replace 4941464 oil pump?
A: No. 4941464 is dedicated for ISC8.3 electronic controlled engine, different relief valve calibration. They are NOT interchangeable.

Q2: Can I mix different cross-reference oil pumps on one 6CT engine?
A: Mechanically they can be bolted on. To get consistent idle & high-speed oil pressure performance, we recommend full set installation with same part number.

Q3: What horsepower engines does 3966840 fit?
A: It fits 220–300HP mechanical 6CT /6CTA /6CTAA 8.3L engines for trucks, construction equipment and land generators