
Product Overview
This genuine Zexel diesel injector plunger is engineered for precision and durability in demanding industrial applications. As a trusted supplier to the global heavy machinery market, we provide reliable OEM-quality parts with direct shipping to major industrial hubs across North America, Europe, the Asia-Pacific region, and the Middle East. This component is essential for maintaining optimal fuel injection pressure and engine performance in excavators and other heavy-duty equipment.
Key Features & Benefits
- Genuine OEM Quality: Manufactured to original Zexel specifications, ensuring perfect fit and reliable performance.
- Premium Steel Construction: High-grade steel material provides exceptional wear resistance and longevity under high-pressure conditions.
- Precision Engineered: Guarantees accurate fuel metering and consistent injection timing for optimal engine efficiency and reduced emissions.
- Long Service Life: Designed as a long-lasting part to minimize downtime and reduce total cost of ownership for your fleet.
- Global Compliance: Sourced and distributed in full compliance with international trade standards for seamless cross-border procurement.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 140163-4420 |
| Primary OEM Number | K334 |
| Alternative Model | K336, K359 |
| Product Name | Injector Plunger |
| Fuel Type | Diesel |
| Material | Steel |
| Condition | Genuine |
| Place of Origin | Japan |
| Minimum Order Quantity (MOQ) | 1 Piece |
| Warranty | 6 Months |
OEM Cross-Reference
This genuine plunger is a direct replacement for the following OEM part numbers:
- Zexel: 140163-4420
- Engine Model: K334, K336, K359
Always verify the part number stamped on your original component before ordering to ensure correct fitment.
Compatibility
This injector plunger is designed for Zexel fuel injection nozzles used in specific industrial diesel engines.
- Primary Application: Excavators and other heavy construction machinery.
- Compatible Engine Codes: K334, K336, K359.
- Vehicle Model: K334 (as referenced in the technical data).
Note: Compatibility can vary by specific engine serial number and manufacturing year. Consult your engine service manual or contact our technical support for verification.
Global Supply & Distribution
We specialize in the international supply of critical engine components for the B2B market. Our streamlined logistics ensure reliable delivery to your location.
- Worldwide Shipping: We export to all major markets, including North America (USA, Canada, Mexico), Europe (Germany, UK, Poland), Asia-Pacific (Australia, Singapore, Japan), and the Middle East (UAE, Saudi Arabia).
- Fast Delivery Network: Expedited shipping options are available to major ports and industrial centers to minimize equipment downtime.
- Export Expertise: All documentation, including commercial invoices and certificates, is prepared to comply with international customs regulations for a smooth import process.
- Bulk & Single Orders: We cater to both large fleet operators and individual workshop needs with a flexible 1-piece MOQ.
Quality Assurance
Every part meets stringent quality standards to ensure performance and reliability in critical engine systems.
- Manufacturing Standard: Produced with original tooling and specifications, ensuring dimensional accuracy and material integrity.
- Warranty: Backed by a 6-month warranty against manufacturing defects, providing peace of mind for your investment.
- Verification: Components are sourced from certified channels to guarantee authenticity and performance matching the original part.
FAQ
Q: How do I confirm this plunger is the correct part for my Zexel nozzle?
A: The surest method is to match the part number. Locate the number stamped on your original plunger (typically 140163-4420) or identify your engine’s model code (K334, K336, or K359). Cross-reference these with the specifications listed above.
Q: What is the typical delivery time to Europe or North America?
A: Delivery times vary by destination and shipping method. Generally, orders to major hubs in Europe or North America can be delivered within 7-14 business days via express air freight. Exact timelines are provided upon order confirmation based on your location.
Q: Is this part suitable for rebuilding fuel injection pumps?
A: Yes, this genuine Zexel plunger is designed specifically for the repair and overhaul of Zexel fuel injection nozzles and pumps. It restores original performance specifications for fuel pressure and metering. We recommend installation by a qualified diesel fuel systems technician.
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 .