1. Locate the air governor. It is usually mounted on the side of the engine, near the fuel injection pump.
2. Loosen the locknut on the air governor speed adjustment screw.
3. Turn the air governor speed adjustment screw clockwise to increase the engine speed, or counterclockwise to decrease the engine speed.
4. Tighten the locknut to secure the air governor speed adjustment screw in place.
5. Start the engine and check the engine speed. If necessary, repeat steps 2-4 until the desired engine speed is achieved.
Here are some additional tips for adjusting the air governor on a Cummins 325 engine:
- Make sure that the engine is at operating temperature before making any adjustments.
- Do not turn the air governor speed adjustment screw more than 1/8 of a turn at a time.
- If you are not sure how to adjust the air governor, consult with a qualified mechanic.
By following these steps, you can easily adjust the air governor on your Cummins 325 engine to achieve the desired engine speed.
