085-9275 Retaining Nut for Caterpillar 3306 Engine Fuel Injector | Excavator Truck

Product Details

Product Overview

This high-quality retaining nut, part number 085-9275 (also referenced as 0859275), is a critical component specifically designed for the fuel injector assembly of the Caterpillar 3306 diesel engine. This genuine part ensures the secure and precise mounting of the fuel injector within the cylinder head, maintaining the necessary sealing pressure for optimal engine performance.

Commonly used in heavy-duty excavators and trucks powered by the Caterpillar 3306 engine, this retaining nut is essential for preventing fuel leaks, maintaining compression, and ensuring the injector operates correctly under high pressure. It is a direct replacement part, manufactured to meet original equipment specifications, providing a reliable and long-lasting solution for your engine’s fuel system.

Key Features & Benefits

• Precise Fitment: Machined to exact OEM specifications (Part #085-9275) for a perfect, secure fit on Caterpillar 3306 engine fuel injectors.
• Superior Durability: Constructed from high-grade materials to withstand extreme engine vibrations, high temperatures, and the clamping forces required for injector sealing.
• Leak-Free Seal: Ensures the fuel injector is held firmly in place, preventing high-pressure fuel leaks that can lead to performance loss and safety hazards.
• Genuine Quality: This is a genuine component, ensuring consistent thread pitch, hardness, and corrosion resistance for a reliable service life of over 6 months under normal operating conditions.
• Reduced Downtime: A simple, direct replacement part that helps minimize equipment downtime during fuel system maintenance or injector replacement.
• Certified Reliability: Manufactured under strict quality controls, providing peace of mind for fleet managers and equipment owners.

Technical Specifications

OEM Cross-Reference

This retaining nut is a direct replacement for the following original equipment manufacturer (OEM) numbers:

• Primary OEM Number: 085-9275
• Alternate Number: 0859275

Note: This part is specifically for the fuel injector hold-down nut on the Caterpillar 3306 engine. Please verify your engine serial number and injector type to ensure compatibility.

Compatibility

This part is commonly used for the following applications:

• Engine Models: Caterpillar 3306 (Natural, Turbocharged, and Aftercooled variants)
• Vehicle/Machine Applications: Caterpillar excavators, trucks, and other heavy equipment powered by the 3306 engine.

Important: Fitment is based on engine model. Always cross-reference your existing part number to confirm compatibility before installation.

Global Supply & Distribution

We specialize in the global supply of heavy-duty engine components. Our extensive distribution network ensures fast and reliable delivery of the 085-9275 retaining nut to customers worldwide.

• Major Markets Served: North America, Europe, Asia-Pacific, Middle East, Africa, and South America.
• Shipping Capabilities: We offer worldwide shipping via air, sea, and express couriers (DHL, FedEx, UPS, TNT).
• Fast Delivery: Orders are processed within 24 hours of payment receipt, with express shipping options available for urgent requirements.
• Port & Industrial Center Delivery: Efficient logistics to major ports and industrial hubs including Los Angeles, Houston, Rotterdam, Dubai, Singapore, and Shanghai.
• Export Compliance: We adhere to all international trade regulations, ensuring smooth customs clearance for our clients.

Quality Assurance

We are committed to providing only high-quality, genuine parts that meet stringent industry standards.

• Manufacturing Standard: Manufactured to meet or exceed OEM specifications for material hardness, tensile strength, and thread accuracy.
• Certifications: Our supply chain is ISO-compliant, ensuring consistent quality control from sourcing to dispatch.
• Testing: Each batch undergoes dimensional inspection and hardness testing to guarantee a perfect fit and long-lasting performance.
• Warranty: This part comes with a 6-month warranty against manufacturing defects. After the warranty period, we provide video technical support to assist with any further issues.

FAQ

1. How do I confirm this 085-9275 nut fits my engine?

First, verify that your engine is a Caterpillar 3306 model. Then, remove the old retaining nut from your fuel injector and compare its physical dimensions (thread size, pitch, and overall length) and the part number stamped on it. If it matches 085-9275, it is the correct replacement. For absolute certainty, consult your engine’s parts manual using your specific engine serial number (ESN).

2. What is the recommended installation torque for this retaining nut?

Correct installation torque is critical to prevent injector damage or fuel leaks. While this specific nut is designed for the 3306 injector, the torque specification can vary slightly based on the injector type (e.g., pencil injector vs. unit injector). We strongly recommend consulting the official Caterpillar service manual for your specific engine model. A common range for similar injector hold-downs is 25-35 ft-lbs, but always verify with the manufacturer’s data.

3. Can I reuse the old retaining nut when replacing my fuel injector?

It is highly recommended to replace the retaining nut with a new one (like this 085-9275) whenever you remove a fuel injector. The nut can experience thread wear, material fatigue, and minor deformation from the high clamping forces and heat cycles over time. Reusing it increases the risk of improper torque, injector movement, and eventual fuel leaks, potentially leading to more costly repairs and downtime. Installing a new nut ensures a secure and reliable seal.