146402-3820 Hydraulic Head Rotor for Isuzu 4JA1 Diesel Engine
The 146402-3820 Hydraulic Head Rotor is a precision fuel injection pump component designed for 4-cylinder VE-type mechanical diesel injection systems.
It is mainly used with Isuzu 4JA1 diesel engines installed in pickup trucks, light commercial vehicles, utility vehicles, and industrial diesel equipment.
Key specifications:
š§ Part Number: 146402-3820 āļø Component: Hydraulic Head & Rotor Assembly š Fuel System: Mechanical Rotary Distributor Injection Pump š© Plunger Size: 11mm ā©ļø Rotation: Left-Hand Rotation š Pump Code: NP-VE4/11L
A worn pump head rotor may cause:
Hard starting
Reduced engine power
Unstable idle
Excessive smoke
Poor fuel delivery
When replacing the hydraulic head rotor, always confirm the original pump number, engine model, plunger size, and rotation direction to ensure correct compatibility.
Professional calibration after installation is recommended for reliable diesel engine performance.
Learn more about 146402-3820 pump head applications, specifications, and replacement information.
