Product Details

Product Overview

This premium Caterpillar C6.6 Crankshaft Oil Seal is a direct replacement part designed to prevent oil leakage at the rear of the crankshaft. Engineered for the demanding conditions of heavy-duty diesel engines, this seal ensures a tight, durable barrier against contaminants and lubricant loss. We supply this critical component to the global aftermarket, shipping to major industrial hubs in North America, Europe, Asia-Pacific, the Middle East, and South America. Whether you are servicing a generator set, excavator, or marine engine, this seal meets OEM specifications for a reliable repair.

Key Features & Benefits

• Premium Material: Constructed from high-grade nitrile rubber (NBR) with a rigid metal casing for structural integrity and long-lasting flexibility.
• Leak-Proof Design: Features a precision-molded sealing lip with a garter spring to maintain constant radial pressure on the crankshaft, preventing oil leaks under high RPM and temperature fluctuations.
• Dust Protection: Includes an integrated dust lip to protect the main sealing lip from external contaminants like dirt and debris, extending service life.
• Direct Fitment: Manufactured to exact OEM dimensions (OD, ID, and width) for a perfect, hassle-free installation without modifications.
• Enhanced Durability: Resistant to engine oils, greases, and extreme operating temperatures ranging from -40°C to +120°C.

Technical Specifications

OEM Cross-Reference

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

• Caterpillar: 8-98023-526-0, 337-4108, 3374108
• Aftermarket Equivalent: 8-98023-526-0 (Primary Reference)

Note: Always verify your existing part number against the specifications above before ordering.

Compatibility

This crankshaft oil seal is specifically designed for use with the Caterpillar C6.6 diesel engine. Common applications include:

• Excavators: Caterpillar 320D, 323D series
• Generator Sets: Caterpillar C6.6 (DE66E0, DE66E0C)
• Industrial Engines: C6.6 (Tier 3/Stage IIIA compliant models)
• Marine Engines: Various pleasure craft and workboat applications

Year Ranges: Typically compatible with engines manufactured from 2006 to 2014. Confirm engine serial number for exact fitment.

Global Supply & Distribution

As a dedicated supplier of heavy-duty engine components, we offer efficient worldwide shipping to meet your operational deadlines. Our logistics network covers:

• North America: Fast delivery to ports like Los Angeles, Houston, and New York, and inland hubs.
• Europe: Regular shipments to Rotterdam, Hamburg, and Antwerp.
• Asia-Pacific: Direct routes to Shanghai, Singapore, and Tokyo.
• Middle East & Africa: Service to Dubai, Jebel Ali, and Durban.
• South America: Deliveries to Santos and Buenos Aires.

We provide flexible shipping options including express courier (DHL, FedEx, UPS) for urgent orders and sea freight for bulk purchases. All shipments comply with international trade regulations.

Quality Assurance

Our manufacturing process adheres to strict quality control standards. Each seal undergoes rigorous testing to ensure:

• Dimensional Accuracy: 100% inspection of ID, OD, and width against OEM blueprints.
• Material Integrity: Hardness and tensile strength tests on the rubber compound.
• Leak Testing: Simulated operating conditions to verify sealing performance.
• Certification: ISO 9001:2015 compliant production facility.

We offer a 12-month warranty against manufacturing defects, providing peace of mind for your repair or maintenance project.

FAQ

Q1: Is this seal a direct replacement for the original Caterpillar part?
Yes, this seal is manufactured to match the exact dimensions and material specifications of the OEM Caterpillar C6.6 rear main seal. It is a direct drop-in replacement and does not require any modifications. Please cross-reference your existing part number with the specifications provided above.

Q2: What is the recommended installation procedure?
Clean the crankshaft surface and seal housing thoroughly. Apply a thin layer of clean engine oil to the seal lip and outer casing. Use a proper seal installation tool or a socket of the same diameter to press the seal evenly into the housing until it is flush. Avoid hammering directly on the seal to prevent damage. Ensure the garter spring is not dislodged during installation.

Q3: How can I prevent premature failure of the new seal?
Ensure the crankshaft surface is free of grooves, scratches, or burrs. Check the engine crankcase ventilation system for blockages, as excessive pressure can damage seals. Always use the correct grade of engine oil and maintain proper oil levels. During installation, avoid over-tightening the seal housing bolts.

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 .