600-815-7581 Komatsu Engine Fuel Shut-off Solenoid (Engine Stop Solenoid) — Used for diesel engine control in heavy construction machinery and generator sets.

I. Core Specifications

Model: 600-815-7581 (6008157581)

Brand: Komatsu

Type: Fuel Shut-off Solenoid / Engine Stop Solenoid

Voltage: 24VDC

Function: Receives signals from the ECM or key switch to cut off fuel supply and stop the engine; energizes to open the fuel line, allowing the engine to run.

Installation Location: On the fuel pump / high-pressure fuel pump body.

II. Compatible Engines and Machine Models

Compatible Engines:

SA12V140, SA6D140, SA6D170, SDA12V140 series diesel engines.

Compatible Machine Models:

Large Excavators: PC650, PC710, PC1250, PC1800, etc.

Wheel Loaders: WA700, WA800, WA900, etc.

Dump Trucks: HD465, HD785, etc.

Generator Sets, Marine Engines.

IV. Common Faults and Diagnostics

Fault Symptoms: Engine fails to start; engine starts but immediately stalls; engine fails to shut off; unstable idle speed.

Diagnostic Methods:

Measure coil resistance (normally approx. 20–40Ω).

Power-on Test: A distinct "click" sound indicating engagement should be heard when energized; the solenoid should return to its original position when power is cut off.

Inspect connector pins for oxidation, and check the wiring harness for damage or short circuits.