Product Overview

This is a premium-quality Fuel Injection Pump Plunger & Barrel Assembly (Element) designed for Hino diesel engines. As a critical component of the PT (Pump Timing) fuel system, this part ensures precise fuel metering and injection pressure for optimal engine performance. Manufactured to OEM specifications, this plunger set offers a direct replacement for part numbers 9 443 612 057 and 134178-5220. We serve a global B2B clientele, with extensive distribution networks across North America, Europe, Southeast Asia, the Middle East, and Africa, ensuring fast and reliable shipping to major industrial centers.

Key Features & Benefits

• Precision Engineering: Machined from high-speed steel for superior wear resistance and long service life.
• OEM Standard Fitment: Exact dimensional and material match to the original Hino PT78 component for hassle-free installation.
• Enhanced Fuel Efficiency: Restores factory fuel delivery curves, helping to reduce fuel consumption and emissions.
• Durable Construction: Heat-treated and hardened to withstand high-pressure injection cycles and thermal stress.
• Cost-Effective Solution: A high-quality aftermarket alternative to expensive dealer parts, without compromising on reliability.

Technical Specifications

OEM Cross-Reference

This plunger assembly is a direct replacement for the following OEM and cross-reference numbers:

• Hino / PT Type: PT78
• Hino Original: 9 443 612 057
• Alternative No.: 134178-5220

Note: Always verify your existing part number before ordering. This unit replaces the plunger and barrel set (matching pair).

Compatibility

• Engine Applications: Hino diesel engines utilizing the PT78 pump element design.
• Vehicle Types: Hino trucks, buses, and industrial equipment equipped with PT-type fuel injection pumps.
• Common Models: Compatible with various Hino chassis models requiring the 9 443 612 057 or 134178-5220 element.

Global Supply & Distribution

We maintain a robust global supply chain to serve B2B buyers efficiently. Our logistics network supports:

• Worldwide Shipping: Reliable air and sea freight to all major ports (Shanghai, Shenzhen, Ningbo, etc.).
• Major Markets: Extensive coverage in North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Asia-Pacific (Japan, Australia, Indonesia), Middle East (UAE, Saudi Arabia), and Africa (Nigeria, South Africa).
• Fast Delivery: Orders processed within 24 hours. Standard delivery time to major industrial hubs is 5-10 business days via express courier.
• Trade Compliance: We adhere to international export standards and provide full documentation for customs clearance.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities with strict quality control.
• Testing: Each plunger and barrel set is tested for dimensional accuracy, surface finish, and pressure tolerance before packing.
• Warranty: Comes with a 5-month warranty against manufacturing defects. Our technical team provides professional after-sales support.

FAQ

Q1: Is this plunger compatible with my Hino J08C engine?
A: This PT78 element (9 443 612 057) is commonly used in Hino engines that require a PT-type pump element. While it fits many Hino models, we recommend checking your pump housing or consulting your engine manual to confirm the part number 134178-5220 matches your current assembly. If unsure, contact our support with your engine serial number.

Q2: What is included in the purchase? A single plunger or a set?
A: This listing is for a single plunger and barrel set (matching pair). You will receive one plunger and its corresponding barrel. For a full pump overhaul, multiple sets may be required depending on the number of cylinders in your engine.

Q3: How do I ensure a long service life for this plunger?
A: To maximize durability, always use clean, high-quality diesel fuel with proper filtration. Ensure the fuel system is free of water and debris before installation. When installing, lubricate the plunger with clean engine oil and avoid forcing it into the barrel. Adherence to standard injection pump maintenance intervals is recommended.