CONTACTOR G. 3L1903 - Caterpillar

To stop in an emergency:Mechanical Governor Control:
Pull upward on the hand grip, and move the control to the shutoff position. Manual Shutoff Control:
Push and hold the control handle until the engine stops. Woodward UG8 Governor:
Turn the load limit knob to "0". Woodward PSG Governor:
Move the lever forward against the stop; hold the lever until the engine is stopped. Mechanical Safety Shutoff Control:
Push and hold the emergency stop button momentarily to allow the overspeed mechanism to trip and start slowing the engine.
This button has a skirt. Do not confuse it with the reset button which is flat. Use this mechanical shutoff button for emergencies only. Do not use it for normal stopping.
Electric Shutoff Solenoid:
Push and hold the ON-OFF-STOP switch in the STOP position until the engine stops. Air Controls:
Push and hold the ON-OFF-STOP switch in the STOP position until the engine stops.