Cummins 6BT5.9 Fuel Injection Pump Gear 72T C3960485 for B Series Engine Parts

Product Details

Product Overview

This high-precision Fuel Injection Pump Gear (72 Teeth) is specifically engineered for the Cummins 6BT5.9 and B Series diesel engines. As a critical component of the fuel delivery system, it ensures precise timing and reliable power output. We are a leading global supplier of heavy-duty diesel engine parts, serving markets in North America, Europe, the Middle East, Southeast Asia, and South America with a strong focus on quality and logistics efficiency.

Key Features & Benefits

• Precision Timing: Manufactured to tight tolerances to ensure accurate synchronization between the engine crankshaft and the fuel injection pump.
• High Durability: Made from hardened alloy steel to withstand high torque and continuous operation in demanding environments.
• Direct Replacement: Exact OEM specification (C3960485) ensures a perfect bolt-on fitment without modifications.
• Wear Resistance: Heat-treated gear teeth provide superior resistance to wear, extending the service life of the fuel system.
• Rigorous Testing: Every gear undergoes hardness and dimensional inspection to guarantee performance and reliability.

Technical Specifications

OEM Cross-Reference

This gear is a direct replacement for the following OEM part numbers:

• Cummins OEM: C3960485
• Alternative/OEM Cross: 3960485, 3926193 (Verify application)

Note: Always verify your engine’s specific gear tooth count and part number before ordering.

Compatibility

• Engine Models: Cummins 6BT5.9, 4BT3.9, B3.3, B5.9 (Mechanical Fuel Pump Versions)
• Applications: Dodge Ram 2500/3500 (1989-1998), Ford F-Series (with Cummins conversion), various agricultural tractors, construction equipment (Case, New Holland), and industrial generators.
• Year Range: Typically fits engines manufactured from 1984 to 1998 for mechanical injection pump setups.

Global Supply & Distribution

We offer reliable worldwide shipping with fast delivery times to major ports and industrial hubs. Our logistics network ensures efficient handling for bulk orders and urgent breakdown supplies.

• Markets Served: USA, Canada, UK, Germany, UAE, Saudi Arabia, Australia, South Africa, Singapore, and Brazil.
• Shipping Options: Express (DHL, FedEx, UPS), Air Freight, and Sea Freight (FCL/LCL) available.
• Export Compliance: All products are packaged according to international export standards for safe transit.

Quality Assurance

• Manufacturing Standard: ISO 9001:2015 certified production facility.
• Testing: 100% inspection of tooth profile, hardness (Rockwell), and concentricity before packaging.
• Warranty: 12-month warranty against manufacturing defects under normal operating conditions.

FAQ

Q1: How do I confirm this 72T gear fits my 6BT5.9 engine?
A: Please check your original part number. If it is C3960485 or 3960485, this gear is a direct match. Visually, the 72-tooth gear is typically used for the injection pump on the front gear train. If you have an older 6BT or a 4BT, count the teeth on your current gear to confirm.

Q2: What is the installation procedure for this gear?
A: Installation requires proper engine timing. The gear must be aligned with the camshaft gear and crankshaft gear timing marks. We recommend using a Cummins service manual and a torque wrench to tighten the retaining nut to the specified torque (usually 90-110 lb-ft). A new key and retaining nut are recommended upon replacement.

Q3: What causes premature wear on an injection pump gear?
A: Common causes include worn camshaft gear bearings, improper backlash adjustment, or contamination in the engine oil. Ensure the mating gears are in good condition and that the engine oil is changed regularly to maximize the gear’s lifespan.