Gear Housing 3991069 for Engine 174 4B 6B B5.9 B3.9

Keywords: 3991069 gear housing, 4B 6B B5.9 B3.9 engine gear housing, diesel engine spare parts, excavator construction machinery replacement parts

Product Overview

Gear Housing Part No.3991069 is the front timing gear housing for 174, 4B, 6B, B5.9, B3.9 series diesel engines. It acts as protective housing and mounting base for timing gears, supporting gear assembly while shielding internal gear set from dust and debris, locking lubricating oil inside the gear chamber. Made of high-strength aluminum alloy casting, it features light weight and strong structural rigidity. Widely used for excavator and construction machinery engine overhaul.

Detailed Specifications

Key Features & Advantages

• High-strength aluminum alloy casting, lightweight and good heat dissipation.
• Precision machining on mounting surface and holes, accurate positioning for easy assembly.
• Stable structure, strong vibration resistance under heavy-duty operation.
• Anti-deformation design, effectively protect timing gear set.
• Strict quality inspection before delivery to guarantee dimensional accuracy.

Application Scope

Fit Equipment: Excavators and construction machinery equipped with 174,4B,6B,B5.9,B3.9 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.