The Detroit Diesel 71 Series Fuel Injector is a critical component for the Detroit Diesel 71 Series engines, which are two-stroke diesel engines widely used in industrial, marine, and truck applications.

Key Details About the 71 Series Fuel Injector:

• Part Number: 5226440 (Verify with a Detroit Diesel dealer or parts supplier for exact compatibility.)

• Application: Used in Detroit Diesel 71 Series engines (e.g., 3-71, 4-71, 6-71, etc.).

• Function: Delivers precisely metered and atomized fuel into the combustion chamber.

• Compatibility: Ensure the injector matches your engine’s specifications (some variations exist based on horsepower and configuration).

The Detroit Diesel 71 Series engine (which uses the 5226440 fuel injector) is a legendary two-stroke diesel that powered a wide range of heavy-duty machinery and vehicles. Here’s where you’ll commonly find it:

1. On-Highway Trucks & Buses

• Classic semi-trucks (1960s–1980s, e.g., Kenworth, Peterbilt, Freightliner)

• School buses (Blue Bird, Gillig, and others)

• Fire trucks & emergency vehicles

2. Off-Road & Industrial Equipment

• Construction machinery:

• Bulldozers (e.g., early Caterpillar graders)

• Cranes (e.g., Lorain, American)

• Pavers and rollers

• Agricultural tractors (e.g., Versatile, White)

• Airport tugs (for moving aircraft)

3. Marine Applications

• Fishing boats & workboats

• Tugboats (reliable for low-RPM torque)

• Barges & ferries

4. Military & Government Use

• M35 2½-ton “Deuce and a Half” trucks (Vietnam War era)

• Generators & pumps (used by the military and municipalities)

5. Stationary & Power Generation

• Backup generators (hospitals, factories)

• Oilfield pumps (for drilling rigs)

• Railroad maintenance equipment

Why Was the 71 Series So Popular?

• Simple design (easy to rebuild, even in the field)

• High torque at low RPM (great for heavy loads)

• Reliability (many still running today!)