Heavy Truck Diesel 6CT 6BT 6BT5.9 Engine Spare Parts Main Bearing 3901431

Keywords: 3901431 main bearing, 6CT 6BT 6BT5.9 crankshaft main bearing, cumm-ins engine main bearing set, heavy truck engine bearing shell, excavator diesel engine spare parts, aftermarket replacement main bearing

Product Overview

Main Bearing Part No.3901431 is critical crankshaft support component, suitable for cumm-ins 6CT, 6BT, 6BT5.9 diesel engines widely used on heavy‑duty trucks and excavators. The main bearing shell supports crankshaft rotation, forms uniform lubrication oil film between crankshaft and engine block, reduces friction loss and bears engine explosion impact load. This replacement bearing set solves common engine failures including abnormal knocking noise, crankshaft scratch, low oil pressure and metal particle contamination in engine oil caused by original bearing wear, ablation and clearance over‑limit. Every main bearing set goes through strict material inspection and dimensional tolerance testing before shipment.

Detailed Specifications

Key Features & Advantages

• Precise machining dimension, perfect matching installation clearance for cumm-ins 6CT 6BT 6BT5.9 engine crankshaft.
• High‑performance bimetallic alloy material, excellent anti‑ablation and wear‑resistant performance for heavy‑load working condition.
• Smooth bearing surface, stable oil‑film retention, effectively protect crankshaft journal from scratch damage.
• Reduce mechanical friction noise, maintain normal engine oil pressure, extend whole engine service life.
• Ideal matching replacement kit for engine overhaul, crankshaft maintenance and cylinder block repair.

Application Scope

Fit Equipment: Heavy‑duty trucks, excavators and construction machinery powered by cumm-ins 6CT, 6BT, 6BT5.9 diesel engine. ‑ Widely used for machinery repair workshops, vehicle refurbishment and full engine overhaul projects.

Our Company Advantage

We are professional supplier of full‑range construction machinery spare parts, supplying engine parts, hydraulic parts, electrical parts, seal kits and complete overhaul kits. ‑ Large ready stock for various machinery spare parts ‑ Factory‑direct wholesale competitive price ‑ Mixed‑order & one‑stop spare‑parts procurement supported ‑ Professional part‑number matching technical support service

Packaging & Shipping

Neutral export carton with shock‑proof inner packing, prevent collision damage during long‑distance transportation ‑ Multiple shipping options: sea freight, air freight, international express for small trial orders ‑ Export documents such as Commercial Invoice, Packing List can be provided.

Contact Us

If you need more excavator spare parts or other construction machinery replacement components, please send your parts list to us. We will offer our best quotation for you quickly