The John Deere RE533501 diesel fuel injector is a precision-engineered component designed for high-pressure fuel delivery in diesel engines. Below are its key structural characteristics:

1. Injector Type

• Electronically Controlled Unit Injector (EUI) or Mechanical (depending on the engine model).

• Uses high-pressure fuel delivery for efficient combustion.

2. Main Components

A. Injector Body

• Made of high-strength steel to withstand high pressures (up to 30,000+ psi in some models).

• Precision-machined for tight tolerances.

B. Nozzle & Tip

• Multi-hole nozzle (typically 4-8 holes) for optimal fuel atomization.

• Sac-type or Valve-Covered Orifice (VCO) design to reduce dribbling and emissions.

• Hardened materials (e.g., tungsten carbide) for durability.

C. Solenoid or Control Valve (if electronically controlled)

• Electromagnetic actuator for precise fuel injection timing.

• Integrated with the engine’s ECU (Electronic Control Unit) for optimized performance.

D. Pressure Spring & Needle Valve

• Controls the opening pressure (e.g., ~200–300 bar, depending on the engine).

• Ensures fuel only sprays when the set pressure is reached.

E. Fuel Inlet & Return Ports

• High-pressure fuel inlet (connects to the common rail or pump).

• Leak-off return port (returns excess fuel to the tank).

F. Sealing Surfaces

• Copper sealing washer at the base for a tight cylinder head seal.

• O-rings to prevent fuel leaks at connection points.