Diesel Engine Piston 3939398 for QSB4.5 Engine

Keywords: 3939398 engine piston, QSB4.5 piston assembly, excavator diesel engine piston, construction machinery engine overhaul spare parts

Product Overview

Engine Piston Part No.3939398 is a key power component specially matched for QSB4.5 diesel engines, widely used on excavators and heavy‑duty construction machinery. It bears high temperature and high pressure inside cylinder, completes gas compression and power output. Effectively solve insufficient power, excessive oil consumption and cylinder knocking caused by original piston cracking, wear or ablation. Each piston is strictly inspected for dimension, weight and surface quality before export carton packaging and delivery.

Detailed Specifications

Key Features & Advantages

• High‑performance aluminum alloy material, excellent high‑temperature resistance, thermal fatigue resistance and load‑bearing performance under heavy‑duty working conditions.
• Precision casting and machining, accurate ring grooves and pin bore size, perfect matching with piston rings and gudgeon pin.
• Effectively eliminate engine power drop, blow‑by gas and burning oil failure caused by worn, deformed or damaged original piston.
• Optimized internal cooling structure, reduce thermal load, slow down piston aging and prolong service life.
• Perfect fit for QSB4.5 engine maintenance and overhaul projects.
• Stable interchangeability, can directly replace original OEM spare parts.

Application Scope

Fit Equipment: Excavators and other heavy‑duty construction machinery equipped with QSB4.5 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

Export carton with shock‑proof protective packaging, avoid collision and scratch 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.