David E. Baker
Department of Agricultural Engineering

Voice communications are impossible in certain agricultural situations due to distance and noise. For this reason, standard Agricultural Hand Signals have been developed for farm machinery operators by the American Society of Agricultural Engineers. Hand signals can prevent accidents and save time. Use them and teach others to use them. Learning this new "language" will give you an easy and effective way to communicate when working around or with machinery.

Illustrations and brief explanations are provided for the following hand signals.

Start the engine.
Figure 1. Start the engine.

To signal "Start the engine," move arm in a circle at waist level as though you were cranking an engine.

Stop the engine.
Figure 2. Stop the engine.

To signal "Stop the engine," move your right arm across your neck from left to right in a "throat-cutting" motion.

Come to me.
Figure 3. Come to me.

To signal "Come to me," raise arm vertically overhead, palm to the front, and rotate in large horizontal circles. (May mean "Come help me" in an emergency.)

Move toward me.
Figure 4. Move toward me. Follow me.

To single "Move toward me" or "Follow me," look toward person or vehicle you want moved, hold one hand in front of you, palm facing you, and move your forearm back and forth.

Move out.
Figure 5. Move out. Take off.

To signal "Move out" or "Take off," face desired direction of movement, extend arm straight out behind you, and then swing it overhead and forward until it's straight out in front of you with palm down.

Speed it up. Figure 6. Speed it up. Increase speed.

To signal "Speed up" or "Increase speed," raise hand to shoulder, fist closed, and thrust fist upward to full extent of arm and back to shoulder rapidly several times.

Slow it down
Figure 7. Slow it down. Decrease speed.

To signal "Slow down" or "Decrease speed," extend arm horizontally at your side, palm down, and wave arm downward (45 degrees minimum) several times, keeping arm straight. Don't move arm above horizontal.

Raise equipment.
Figure 8. Raise equipment.

To signal "Raise equipment, point upward with forefinger while making a circle with your hand at head level.

Lower equipment.
Figure 9. Lower equipment.

To signal "Lower equipment," point toward the ground with forefinger of one hand while moving the hand in circular motion.

This far to go.
Figure 10. This far to go.

To signal "This far to go," put hands in front of face, palms facing each other. Move hands together or farther apart to indicate how far to go.

Figure 11. Stop.

To signal "Stop," raise hand upward, arm fully extended, palm to the front. Hold that position until the signal is understood.

Publication No. G1965