Rocker Lever 3934921 For 4B3.9 6B5.9 6C8.3 C8.3 G8.3 GTA8.3 ISBE4 ISC ISC8.3 ISL L8.9G L9.3 L9N QSC8.3 QSJ8.9 QSL9 Engine

Keywords: 3934921 rocker lever, 4B3.9 6B5.9 6C8.3 engine rocker arm assembly, excavator diesel engine valve train spare parts, construction machinery rocker lever, aftermarket replacement rocker lever

🔹Product Overview

Rocker Lever Part No.3934921 is a critical valve‑train component for multiple series diesel engines including 4B3.9, 6B5.9, 6C8.3, C8.3, G8.3, GTA8.3, ISBE4, ISC, ISC8.3, ISL, L8.9G, L9.3, L9N, QSC8.3, QSJ8.9, QSL9, widely applied on excavators and heavy‑duty machinery. It transfers camshaft power to intake and exhaust valves, controlling valve opening‑closing timing to complete engine air intake and exhaust cycles.

This replacement rocker lever resolves common faults such as abnormal valve noise, unstable engine power and insufficient cylinder compression caused by original lever surface wear, shaft hole damage and fracture under long‑term heavy‑load operation. Each rocker lever undergoes strict surface hardness detection and dimension inspection before shipment.

🔹Detailed Specifications

🔹Key Features & Advantages

• ✅ High‑strength alloy steel material, high surface hardness, excellent wear‑resistance and impact‑resistance for high‑frequency reciprocating working conditions.
• ✅ Precise hole position and contact‑surface machining, stable valve‑driving performance, guarantee accurate valve timing.
• ✅ Good overall structural toughness, resist fracture under engine heavy‑duty running.
• ✅ Effectively eliminate abnormal valve knocking noise, power drop and poor exhaust caused by worn or damaged original rocker lever.
• ✅ Perfect fit for multi‑model engine valve‑train overhaul, easy assembly.

🔹Application Scope

Fit Equipment: Excavators and heavy‑duty machinery equipped with above‑mentioned series diesel engines ‑ Widely applied for engine repair workshops and routine equipment maintenance 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.