3406C Industrial Engine Caterpillar

A manual shutoff shaft will override the governor control. The shaft will move the fuel control linkage to the FUEL OFF position. Refer to the MODEL VIEWS for the engine location of the shaft. The engine may be stopped by using the shaft and either the Woodward Actuator (if equipped) or the Mechanical Governor (if equipped).

Illustration 1	g00723091
Typical Woodward actuator control lever

If the engine is equipped with a Woodward Actuator, move the control lever to the "FUEL OFF" position.

Illustration 2	g00723092
Typical mechanical governor control

If the engine is equipped with a Mechanical governor control, move the control lever to the FUEL OFF position.

Hold the lever at the FUEL OFF position until the engine stops.

Some engines are equipped with an air shutoff. The air shutoff is located between the aftercooler and the turbocharger. If the engine is equipped with an air shutoff lever, move the lever to the OFF position.

Note: Individual applications will have different control systems. Ensure that the shutoff procedures are understood. Use the following general guidelines in order to stop the engine.

1. Reduce the engine speed (rpm) to low idle. Remove the load.

2. Increase the engine speed (rpm) to no more than one-half of the rated speed (rpm). Perform this procedure for three to five minutes in order to cool the engine. Reduce the engine speed (rpm) to low idle.

3. After the cool down period, turn the start switch to the OFF position.