Details

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📘 What is a Diesel Hand Primer Pump?

A hand primer pump is a manual fuel-priming device used in diesel engines to:

• Prime the fuel system after changing fuel filters or running dry

• Remove airlocks from fuel lines to ensure smooth fuel flow

• Assist cold starts in vehicles without electric fuel pumps

It allows you to manually push fuel from the tank to the injection system to restore normal engine function—especially critical in older diesel systems, commercial vehicles, or engines without automatic priming.

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📊 Comparison Table: Plastic vs. Metal Bosch Hand Primer Pump

Feature	Plastic Type (2 447 222 126)	Metal Type (F 002 H23 520)
Material	High-grade fuel-resistant plastic	Durable aluminum/zinc alloy
Application	Passenger vehicles, light commercial use	Heavy-duty trucks, tractors, industrial machines
Durability	Standard durability, cost-effective	High resistance to heat and mechanical stress
Weight	Lightweight and compact	Heavier but more rugged
Temperature Tolerance	Moderate (normal engine bay conditions)	High (suitable for extreme conditions)
Common Usage	Toyota Hilux, Isuzu D-Max, Nissan Navara, etc.	Hino, Fuso, Volvo Trucks, Construction Equipment
Functionality	Manual priming, air bleeding, cold start assist	Same, with higher endurance for repeated use
Part Number	Bosch 2 447 222 126	Bosch F 002 H23 520

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🔧 Function Overview:

• ✅ Manually delivers diesel fuel into the injection system

• ✅ Helps restart engine after filter change or fuel drain

• ✅ Removes trapped air from fuel lines (airlock)

• ✅ Reliable solution for engine no-start due to fuel starvation

• ✅ Trusted Bosch OEM quality for aftermarket or replacement use

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📦 Selection Options:

• 🔘 Plastic Type – Bosch 2 447 222 126

• 🔘 Metal Type – Bosch F 002 H23 520

Choose your desired version based on your vehicle type or usage requirements.

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💡 Ideal For:

• Mechanics and workshops doing fuel system service

• Diesel vehicle owners performing filter changes

• Operators of diesel-powered machinery needing reliable restart tools