Diesel Generator Stalling After Starting? Check Oil

I. Problem Overview

- The diesel generator starts but then stalls.

II. Key Component

- Solenoid Valve: Located on the oil pump, it is the actuating part for the engine oil protection system.

III. Function of the Solenoid Valve

- After starting, it automatically cuts off the fuel pump's function to prevent engine damage due to low oil pressure.

IV. Analysis of Failure Causes

- A. Low Engine Oil: The generator detects low oil and cuts off the fuel circuit via the solenoid valve.

- B. Dirty Engine Oil: The oil passages become blocked, the oil pressure sensor cannot detect pressure, and the solenoid valve cuts off the fuel circuit.

V. User Feedback

- The engine oil level is not low, but the oil is very dirty.

VI. Solution

- Clean the oil filter or oil passages to ensure the oil pressure sensor can detect oil pressure.

VII. Diagnostic Indicator

- Red indicator light on the diesel generator control panel:

 - Normal condition: The light illuminates after starting and turns off after normal operation.

 - Abnormal condition: The light does not turn off after starting, or the generator starts and immediately stalls, indicating an oil-related issue.

VIII. Precautions

- Address oil issues promptly to prevent serious failures and increased repair costs.