Heavy‑Duty Truck Diesel Engine Main Bearing 3901431, Construction Machinery Replacement Crankshaft Bearing Shell

Keywords: 3901431, Main Bearing, 3901431 crankshaft main bearing, 6CT 6BT 6BT5.9 engine bearing, diesel engine spare parts, excavator engine overhaul parts, heavy‑truck engine bearing shell, construction machinery replacement parts

🔹Product Overview

This main bearing Part No.3901431 is a core load‑bearing component specially designed for 6CT, 6BT, 6BT5.9 diesel engine. It is installed between crankshaft and engine block, forms a friction‑reducing lubrication layer to support crankshaft stable rotation, bears huge radial load during engine operation and reduces wear of crankshaft journal. Our aftermarket main bearing is strictly manufactured according to OEM specification, with excellent wear‑resistance, high‑temperature resistance and anti‑fatigue performance. It can keep stable working performance under long‑time heavy‑load transportation and construction working conditions. It is a reliable aftermarket spare part for engine overhaul and repair of heavy‑duty trucks and construction equipment.

🔹Detailed Specifications

🔹Key Features & Advantages

• ✅ Precise OEM Dimension Strictly produced following original drawing data, precise size tolerance, perfect fit without installation gap.
• ✅ Premium Bimetal Bearing Material High‑strength bearing alloy layer, outstanding load‑bearing capacity, long service life.
• ✅ Excellent Wear‑Resistant & Anti‑Fatigue Performance Resist high‑speed friction and heavy impact load, not easy to burn or abrade.
• ✅ High‑Temperature Stability Keep good mechanical property under long‑time high‑temperature working environment.
• ✅ Direct Plug‑in Replacement Fully interchangeable with original spare parts, easy installation without extra modification during engine repair.
• ✅ 100% Individual Testing Before Shipment Every single main bearing passes strict size and material inspection before delivery, stable and reliable for engineering projects.

🔹Application Scope

Fit for 6CT, 6BT, 6BT5.9 diesel engine, widely used on these heavy‑duty machines: Heavy‑duty Trucks, Excavators, Bulldozers, Wheel Loaders, Generator Sets, And other construction machinery & industrial equipment equipped with above‑mentioned engine models.

🔹Our Company Advantage

We are a professional supplier for full‑series construction machinery engine spare parts. We can supply complete engine overhaul kits including main bearings, connecting rod bearings, thrust washers, oil seals, gaskets, intake & exhaust valves, valve seals, fuel injectors, fuel pump, nozzle, piston, cylinder liner, cylinder head gasket, turbocharger and other wearing spare parts. Rich stock for most popular 6BT, 6BT5.9, 6CT and other engine models Competitive factory direct price Fast shipment for in‑stock goods Accept mixed container order for one‑stop spare parts purchasing Provide professional technical matching service for your part number inquiry

🔹Packaging & Shipping

Independent shock‑proof inner package for precision main bearing set Outer carton with shock‑proof protection for sea transportation Support sea freight, air freight, express delivery for small trial order Full export document can be offered (Commercial Invoice, Packing List)

🔹Contact Us

If you need more spare parts for 6CT / 6BT / 6BT5.9 series engine or other construction machinery, please send your part list to us. We will offer you our best quotation immediately.