PANEL GP-CONTROL 2173865 - Caterpillar

Crank Termination (CT)
This is an adjustable engine speed setting that signals the starting motor that the engine is firing and cranking must be terminated. When the speed setting is reached, a switch will open to start the engine hour meter. ESS Crank Terminate Calibration can be done by using the engine or by using 8T5200 Signal Generator/Counter Group. To calibrate crank terminate using the engine follow this procedure. To calibrate crank terminate using the 8T5200 refer to P-551 ESS Crank Terminate Test.1. Remove lockwire and seal from seal screws (4 and 5). Remove seal screw (5) from access hole for crank terminate adjustment screw.2. Use a small screwdriver and lightly turn C.T. (crank terminate) adjustment potentiometer twenty turns in the direction of "MAX ARROW" (clockwise). The crank terminate adjustment screw is made so that it can not cause damage to the potentiometer or be removed if the adjustment screw is turned too much.3. Turn C.T. (crank terminate) adjustment potentiometer twelve turns in the direction of "MAX ARROW" (counterclockwise) for an approximate crank terminate setting.4. Start engine and make a note of the speed at which the hour meter energizes. See the chart for the correct crank terminate speed. If setting is not correct do steps 5 and 6. If setting was correct do Step 7.5. Stop engine and turn adjustment potentiometer (clockwise to increase and counterclockwise to decrease) crank terminate speed.6. Start and make a note of the speed at which the hour meter energizes. If needed, make more small adjustments until the crank terminate speed is correct.7. Install seal screw (5) for crank terminate adjustment hole and install lockwire and seal. Note A: To verify overspeed shutdown system operation, push in for a moment the verify push button. The engine must shut down at 75% or more of overspeed setting. Note B: Input Voltage: Maximum 37 VDC Minimum 8 VDC Note C: The magnetic pickup frequency (Hz) at the overspeed or cranking termination setting is calculated with the formula that follows:MAGNETIC PICKUP FREQUENCY = NO. OF TEETH ON RING GEAR X OVERSPEED OR CRANKING TERMINATION RPM SETTING + 60