Main Bearing 4025121 for QSM11 Diesel Engine

Keywords: 4025121 main bearing, QSM11 engine main bearing set, excavator crankshaft main bearing, construction machinery engine spare parts

Product Overview

Main Bearing Part No.4025121 is a high-quality crankshaft main bearing set matched for QSM11 diesel engine. It supports the crankshaft, reduces friction during crankshaft rotation, bears heavy radial load and protects crankshaft from wear. Widely used for excavators and heavy-duty construction machinery. It is the ideal replacement part for worn main bearing during engine overhaul and repair.

Detailed Specifications

Key Features & Advantages

• High performance alloy material, excellent wear resistance and load bearing capacity.
• Precise machining tolerance, perfect fit clearance to reduce friction loss.
• Good anti-fatigue property, stable performance under continuous heavy load.
• Great surface lubrication retention, effectively prevent dry friction damage.
• Original specification size, convenient for direct installation.
• Strict quality inspection for each set before delivery.

Application Scope

Fit Equipment: Excavators and heavy‑duty construction machinery equipped with QSM11 diesel engine ‑ Widely used for machinery repair shops, engine rebuilding factories and heavy‑duty equipment overhaul services.

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

• Shock-proof inner packing + export neutral carton, 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.