Yanmar X3 Diesel Injection Pump 719935-51380 | High-Pressure Fuel Pump For 3TNV82/Industrial Engines | OEM Precision Fuel System

In modern diesel ecosystems, performance is no longer defined solely by pressure-it is defined by fuel intelligence: precise timing, atomization consistency, and adaptive delivery. The X3 Diesel Injection Pump 719935-51380 represents this shift, engineered for compact Yanmar platforms where efficiency, durability, and emissions compliance intersect.

Rather than acting as a simple mechanical driver, this pump functions as a dynamic fuel metering core, enabling stable combustion across variable load conditions. Designed for Yanmar 3TNV82 series engines, it integrates seamlessly into compact industrial and off-road applications.

 

 

Parameter	Value
Part Number	719935-51380
Pump Type	Mechanical / High-Pressure Injection Pump
Weight	Approx. 20.28 kg
Dimensions	355 × 320 × 215 mm
Fuel Type	Diesel
Origin	Japan (OEM standard)
System Role	Fuel metering + pressurization
Installation	Engine-mounted direct drive

 

 

Unlike common rail systems that rely on shared pressure reservoirs, the X3 pump operates through direct pressure generation per injection cycle, ensuring:

⚡ Immediate fuel response

🎯 Precise injection timing

🔄 Reduced dependency on electronic control

This makes it particularly suitable for:

Harsh environments

Mechanical reliability-focused markets

Regions with variable fuel quality

 

 

✅ OEM-level precision for Yanmar engines

✅ Designed for mechanical reliability over electronic complexity

✅ Ideal for global aftermarket demand (especially Africa, Southeast Asia, South America)

✅ Proven durability in non-ideal fuel conditions

 

 

In today's diesel market, this pump remains highly relevant due to:

Exceptional durability in harsh environments

Reduced reliance on electronic control systems

Lower maintenance complexity compared to common rail

Strong compatibility with global compact equipment

For fleet operators and repair specialists, it offers a balance of reliability, serviceability, and operational efficiency.

 

 

1. Is this pump suitable for common rail systems?

No. It is designed for mechanical injection systems, not high-pressure common rail architectures.

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2. What is the typical service life?

With proper maintenance, it can exceed 8,000–12,000 operating hours, depending on fuel quality and workload.

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3. Can it handle low-quality diesel?

Yes, compared to electronic systems, it shows higher tolerance to fuel impurities, but filtration is still critical.

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4. Is calibration required after installation?

Factory calibration is standard, but fine-tuning may be needed for optimal engine performance.

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5. What are early failure symptoms?

Delayed start

Black smoke increase

Uneven engine speed

 

 

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