Product Overview

This is a premium replacement piston assembly with pin, engineered for Caterpillar 3400 Series diesel engines. Designed for durability and performance, this part is a critical component for engine rebuilds and overhauls in heavy-duty industrial, marine, and power generation applications. We supply this high-quality component to a global network of distributors, workshops, and OEM service centers, with major markets including North America, Europe, the Asia-Pacific region, and the Middle East.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM specifications for a perfect fit and optimal compression.
• Superior Durability: Constructed from high-grade aluminum alloy to withstand extreme temperatures and pressures within the combustion chamber.
• Enhanced Heat Dissipation: Optimized design promotes efficient heat transfer to the cylinder liner, reducing thermal stress and extending component life.
• Pre-Assembled Convenience: Supplied as a complete piston and pin assembly, ready for installation to streamline the rebuild process.
• Reliable Performance: Ensures restored engine power, fuel efficiency, and meets the rigorous demands of continuous heavy-duty operation.

Technical Specifications

OEM Cross-Reference

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

• Caterpillar: 7N3633, 7N-3633

Always verify the part number from your original component or engine serial number before ordering to ensure correct compatibility.

Compatibility

This piston assembly is compatible with a wide range of Caterpillar 3400 Series diesel engines, commonly found in:

• Engine Models: Caterpillar 3406, 3408, 3412 (Various configurations and horsepower ratings).
• Typical Applications: Heavy-duty trucks, industrial machinery, marine propulsion, generator sets, mining equipment, and agricultural machinery.
• Note: Compatibility can vary based on specific engine serial number (ESN) and configuration. It is the buyer’s responsibility to confirm the correct part number for their specific engine.

Global Supply & Distribution

We are a leading supplier of heavy-duty engine components with extensive international trade expertise. Our logistics network ensures reliable delivery to key industrial hubs worldwide.

• Worldwide Shipping: We export to all major continents, including North America (USA, Canada, Mexico), South America, Europe (EU and non-EU), Asia-Pacific (China, Australia, Southeast Asia), the Middle East, and Africa.
• Efficient Logistics: Fast containerized (FCL/LCL) and air freight options available to major ports and airports such as Los Angeles, Rotterdam, Singapore, Dubai, and Sydney.
• Trade Compliance: All shipments are prepared with accurate commercial invoices, packing lists, and harmonized system (HS) codes to ensure smooth customs clearance.
• B2B Focus: We specialize in bulk orders for distributors, large workshops, and fleet operators, offering competitive pricing and dedicated support.

Quality Assurance

Our commitment to quality ensures you receive a component you can trust for critical engine applications.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced CNC machining and quality control processes.
• Rigorous Testing: Each piston undergoes dimensional inspection, hardness testing, and visual quality checks to meet performance specifications.
• Warranty: Backed by a standard warranty against manufacturing defects. Please contact us for specific warranty terms applicable to your region.
• Certification: Materials are sourced from certified suppliers, and production follows strict quality management protocols.

FAQ

Q: How do I confirm this piston is the correct part for my specific Caterpillar 3406 engine?
A: The most reliable method is to cross-reference the part number stamped on your original piston or use your engine’s serial number (ESN) with the official Caterpillar parts system or a trusted cross-reference guide. Our part number 7N3633 is a common fit, but sub-models may have variations.

Q: Is the wrist pin included, and is it pre-fitted to the piston?
A> Yes, this is a complete piston assembly. The high-strength steel wrist pin is included and is typically pre-assembled, ready for installation onto the connecting rod during the engine rebuild process.

Q: What other components should I replace when installing a new piston?
A: For a reliable and long-lasting rebuild, it is highly recommended to also replace the piston rings, cylinder liner (sleeve), piston pin bushings (in the connecting rod), and rod bolts as part of a comprehensive engine overhaul kit. This ensures all wear components are renewed for optimal performance.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .