Upgrade your diesel engine’s fuel system with our premium A731 131153-5220 Diesel Injection Pump Plunger. Manufactured from high-speed steel and rigorously tested, this plunger is designed for the demanding environments of heavy-duty ISUZU engines. We serve a global clientele, with major markets in North America, Europe, Asia-Pacific, the Middle East, and South America, ensuring reliable supply chains for B2B buyers worldwide.

Key Features & Benefits

• Superior Durability: Crafted from high-speed steel (HSS) for exceptional wear resistance and extended service life, even under high-pressure injection conditions.
• Precision Engineering: Manufactured to standard size with tight tolerances, ensuring optimal fuel metering and combustion efficiency for maximum engine performance.
• 100% Professional Tested: Each plunger undergoes rigorous quality control checks to guarantee flawless operation and reliability from the moment of installation.
• Direct Replacement: Designed for a perfect, hassle-free fit on specific ISUZU engine models, minimizing downtime for your fleet or workshop.
• Cost-Effective Solution: A high-quality alternative at a competitive price point, backed by a 6-month warranty for your peace of mind.

Technical Specifications

OEM Cross-Reference

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

• OEM Number: 131153-5220
• Model Number: A731

Compatibility

This injection pump plunger is specifically designed for the following engine and vehicle applications:

• Engine Models: ISUZU 6HE1, 6HH1, 6HK1
• Vehicle Application: ISUZU Forward Series (Trucks and Buses)
• Fuel System: Diesel Injection Pump

Global Supply & Distribution

We specialize in efficient global logistics to support your operations. Our standard delivery time is 3-7 days after order confirmation. We ship to all major ports and industrial centers worldwide, including:

• North America: Los Angeles, Houston, New York, Vancouver
• Europe: Rotterdam, Hamburg, Antwerp, Felixstowe
• Asia-Pacific: Singapore, Shanghai, Tokyo, Sydney
• Middle East & Africa: Dubai, Jebel Ali, Durban
• South America: Santos, Buenos Aires, Callao

We accept payments via T/T, Western Union, and PayPal to facilitate seamless international transactions.

Quality Assurance

Our manufacturing process adheres to strict quality control standards. Every A731 plunger is 100% professionally tested to ensure it meets or exceeds OEM specifications for performance and reliability. We are confident in the quality of our product, which is why we back it with a 6-month warranty against manufacturing defects.

FAQ

Q: Is this plunger a direct replacement for my ISUZU 6HK1 engine?
A: Yes, the part number A731 / 131153-5220 is designed as a direct replacement for the injection pump plunger in ISUZU 6HE1, 6HH1, and 6HK1 diesel engines. Please verify your existing part number to ensure a perfect match.

Q: What is the recommended installation procedure?
A: Installation should be performed by a qualified diesel mechanic. The plunger must be installed with absolute cleanliness to prevent contamination. Lubricate with clean diesel fuel during assembly and ensure the plunger moves freely within the barrel before securing. Incorrect installation can lead to pump failure.

Q: How should I store this plunger before installation?
A: Store the plunger in its original packaging in a cool, dry environment. Keep it away from moisture, dust, and extreme temperatures. The protective coating should not be removed until the moment of installation to prevent corrosion or damage to the precision-ground surface.

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 .