How to reduce the idle speed of the excavator engine of Cat 313DGC?

1. Loosen the throttle opening adjustment screw to make the engine reach the lowest stable speed.

2. Screw in the idle speed adjusting screw with a screwdriver, and then slowly unscrew the idle speed adjusting screw when the engine is about to stall, so that the engine can run smoothly and reach a high speed.

3. Unscrew the throttle opening adjustment screw again to reduce the engine speed.

4. Adjust the idle adjusting screw to increase the engine speed.

5, and then increase the speed suddenly turn off the throttle, keep the engine running without stalling.