Product Overview

This premium 20x30x7 Oil Seal is a critical component for maintaining the integrity of diesel engine fuel injection systems. Manufactured to exacting standards in Shandong, China, this seal is designed for direct replacement and repair applications. We serve a global B2B clientele, with major markets in North America, Europe, Southeast Asia, and the Middle East, ensuring reliable supply chains for workshops, distributors, and fleet maintenance operations worldwide.

Key Features & Benefits

• Precision Fitment: Engineered to the exact 20mm inner diameter, 30mm outer diameter, and 7mm thickness specifications for a perfect, leak-proof seal.
• High Durability: Constructed from high-quality elastomer compounds designed to withstand the pressures and chemical exposure within fuel injection systems.
• Reliable Performance: Ensures consistent sealing action to prevent fuel leaks, maintain system pressure, and optimize engine performance.
• Cost-Effective Solution: A direct OEM-quality replacement part that extends the service life of your diesel engine components without the premium price tag.
• Easy Installation: Standard design allows for quick and straightforward installation by qualified technicians, minimizing downtime.

Technical Specifications

OEM Cross-Reference

This 20x30x7 oil seal is a standard size used across numerous diesel engine platforms. While the primary identifier is the dimensional code, it is a direct replacement for OEM seals with the same dimensions. Cross-reference this size against your part catalog.

• Primary Part Number: 20x30x7
• Common Interchange Sizes: 20mm ID x 30mm OD x 7mm T
• Always verify the physical dimensions against your original part before purchase.

Compatibility

This oil seal is a universal component based on its physical dimensions. It is compatible with a wide range of diesel engines from manufacturers such as Cummins, Caterpillar, Komatsu, Perkins, Yanmar, and others where a 20x30x7 seal is required in the fuel injection pump, timing cover, or other rotating shaft applications.

• Engine Type: Diesel Engines (Industrial, Agricultural, Automotive)
• System: Fuel Injection System, Timing Gears, Pumps
• Application: Replacement & Repair

Global Supply & Distribution

We are equipped to handle bulk B2B orders with efficient worldwide logistics.

• Worldwide Shipping: Reliable shipping via sea, air, and express couriers (DHL, FedEx, UPS, TNT).
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, Poland), Asia-Pacific (Australia, Japan, Korea, Indonesia), Middle East (UAE, Saudi Arabia, Turkey), and Africa (South Africa, Nigeria).
• Fast Delivery: Efficient processing and dispatch to major international ports and industrial hubs.
• Export Experience: We have extensive experience in cross-border trade, customs clearance, and international documentation.

Quality Assurance

Our commitment to quality ensures reliable performance in demanding environments.

• Manufacturing Standards: Produced under strict quality control measures to ensure dimensional accuracy and material integrity.
• Warranty: Backed by a 4-month warranty against manufacturing defects.
• Testing: Each batch is subject to visual and dimensional inspection to ensure a consistent, high-quality product.

FAQ

Q1: How do I verify if this 20x30x7 oil seal is the correct replacement for my engine?
A1: The most critical step is to measure your original seal. The three numbers (20x30x7) correspond to the Inner Diameter (ID), Outer Diameter (OD), and Thickness (T) in millimeters. If your existing seal measures exactly 20mm ID, 30mm OD, and 7mm T, this part is a direct fit. Always confirm the dimensions before ordering.

Q2: What is the correct installation procedure for this oil seal?
A2: Clean the housing bore and shaft thoroughly. Apply a thin layer of clean engine oil to the seal’s outer edge and sealing lip. Use a seal driver or a socket of the exact outer diameter to press the seal squarely into the housing until it is flush. Avoid hammering directly on the seal body. Ensure the shaft has no burrs or sharp edges to prevent damaging the lip during installation.

Q3: What is the typical lifespan of this oil seal in a diesel engine fuel injection pump?
A3: Lifespan depends on operating conditions, temperature, and the quality of the installation. Under normal operating conditions in a clean fuel system, a high-quality seal like this can last for thousands of hours. Regular inspection for leaks during routine maintenance is recommended to prevent system contamination or failure.

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 .