Product Overview

This high-quality Fuel Injection Pump Barrel and Plunger Assembly is a direct replacement for the Hino diesel engine fuel system. Manufactured to precise OEM specifications, this component (part numbers 134151-5120 and P131) is essential for restoring proper fuel pressure and injection timing. We are a leading supplier based in Shandong, China, with a robust global supply chain serving major markets including North America, Europe, South America, Asia-Pacific, and the Middle East. Our parts are available for immediate shipment to industrial hubs and ports worldwide, ensuring minimal downtime for your fleet.

Key Features & Benefits

• Superior Durability: Constructed from high-speed steel for exceptional wear resistance, extending the service life of the fuel injection pump.
• Precision Engineering: Manufactured to exact OE tolerances for a perfect seal and optimal fuel delivery, ensuring consistent engine performance.
• Direct Fitment: A direct replacement for the original Hino pump assembly, requiring no modifications for installation.
• Restored Efficiency: Replaces worn components to restore fuel pressure, improve combustion, reduce fuel consumption, and lower emissions.
• Cost-Effective Solution: A reliable aftermarket alternative to expensive OEM parts, offering high value without compromising on quality.

Technical Specifications

OEM Cross-Reference

This Barrel and Plunger Assembly is a direct replacement for the following OEM numbers:

• 134151-5120 (Original Hino Number)
• 1341515120
• P131 (Common Aftermarket/Service Number)

Note: Always verify the part number on your existing pump assembly to ensure compatibility.

Compatibility

• Engine Make: Hino
• Application: Various Hino diesel engines used in trucks, buses, and industrial equipment.
• System: Diesel Fuel Injection Pump (In-Line or Rotary type, typically found on older to mid-model Hino engines).
• Note: This is a specific component for the fuel injection pump itself. Please confirm your pump model requires a P131-type barrel and plunger.

Global Supply & Distribution

We are a dedicated exporter of diesel engine components, offering efficient logistics to support global B2B operations. Our distribution network ensures fast and reliable delivery to major ports and industrial centers worldwide, including Los Angeles, Rotterdam, Dubai, Singapore, and Shanghai. We serve a diverse range of markets:

• North America: USA, Canada, Mexico
• Europe: UK, Germany, France, Netherlands, Poland
• Asia-Pacific: Japan, Korea, Australia, Indonesia, Thailand
• Middle East & Africa: UAE, Saudi Arabia, Nigeria, South Africa
• South America: Brazil, Argentina, Chile

We handle all export documentation and customs compliance to ensure a smooth transaction for our international clients.

Quality Assurance

• Manufacturing Standard: Produced in an ISO 9001 certified facility, ensuring consistent quality control.
• Material Quality: Made from premium high-speed steel for maximum hardness and durability.
• Testing: Each unit is subject to dimensional and surface finish inspections to guarantee a precise fit and leak-free operation.
• Warranty: We offer a 4-month warranty against manufacturing defects, providing peace of mind for your purchase.

FAQ

Q1: How do I know if this 134151-5120 / P131 barrel and plunger fits my Hino engine?
A: This part is not specific to the engine block itself, but to the fuel injection pump mounted on the engine. You must remove the pump’s delivery valve holder to inspect the existing plunger and barrel assembly. The part number (e.g., P131 or 134151-5120) is typically stamped on the barrel flange. Please match this number exactly before ordering.

Q2: What are the signs that my barrel and plunger needs replacement?
A: Common symptoms include hard starting, engine misfiring, black smoke from the exhaust, reduced power, and unstable idling. These issues are often caused by wear in the precision-mated surfaces of the barrel and plunger, which leads to fuel pressure loss within the pump. Replacing this assembly is a critical step in rebuilding a fuel pump.

Q3: What is the recommended installation procedure for this part?
A: Installation requires specialized knowledge of fuel injection systems. The process includes removing the old assembly, thoroughly cleaning the pump housing, lubricating the new barrel and plunger with clean diesel fuel, and carefully installing it without forcing it. It is crucial to replace the delivery valve and tighten the holder to the specified torque. We strongly recommend that this job be performed by a qualified diesel injection technician. Incorrect installation can lead to immediate pump failure.