3945917 Cummins Main Bearing Set STD For C 8.3 Seies Engines

Product Brief:

The main bearing set is a genuine standard-size (STD) overhaul kit engineered specifically for Cummins C Series 6CT, 6CTA, QSC8.3 and ISC8.3 diesel engines. As a complete factory-matched bearing set, it includes all upper and lower main bearings and thrust washers required for a full crankshaft overhaul, eliminating the need for separate single-piece part sourcing.

Specification:

✔️Construction Machinery: Excavators, loaders, bulldozers, 6CT engine overhaul

✔️Road Vehicles: Heavy-duty trucks, buses, 6C/6CT powertrain maintenance

✔️Stationary Applications: Land-based generator sets, air compressors, pump units. 

Why Choose US?

✅ Over 10 years experience as Cummins authorized agent, genuine parts guarantee

✅ Strict dimension control, stable oil film to prevent engine seizure under heavy load

✅ Ready stock, fast global shipment, competitive price for bulk order

✅ Professional technical support for engine overhaul & part matching

FAQ:

Q1: What is included in 3945917 package?

A1: Full set of upper & lower main bearings plus thrust washers. Complete kit for one engine crankshaft overhaul, no extra separate bearings needed.

Q2 Can I replace only one piece of main bearing instead of the whole set?

A2: Not recommended. Main bearings work as a matched assembly. Always replace the complete set during engine overhaul to avoid uneven clearance, oil film failure and crankshaft damage.

Q3: Can I replace only one piece of main bearing instead of the whole set?

A3: Not recommended. Main bearings work as a matched assembly. Always replace the complete set during engine overhaul to avoid uneven clearance, oil film failure and crankshaft dam