ELECTRIC SHUTOFF SYSTEM
TROUBLESHOOTING
PROCEDURE A
OVERSPEED SETTING CALIBRATION
ELECTRONIC OVERSPEED SWITCH
11. Verity button. 12 Reset button. 13 "LED" overspeed light 14. Seal screw plug (overspeed). 15. Seal screw
plug (crank terminate).
1.
Remove lockwire and seal from seal screws (14 and
15). Remove seal screw (14) from access hole for
overspeed adjustment screw.
2.
Use a small screwdriver and lightly turn O.S.
(overspeed) adjustment potentiometer twenty turns
in the direction of "MAX ARROW" (clockwise).
NOTE: The overspeed 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.
Run the engine at 75% of desired overspeed setting
rpm. Make reference to the SPEED
SPECIFICATION CHART.
4.
With engine at 75% of overspeed setting rpm, push
VERIFY pushbutton (11) and hold in. Turn O.S.
(overspeed) adjustment potentiometer in the
direction opposite of "MAX ARROW"
(counterclockwise) slowly until "LED" overspeed light
(13) comes on. Engine will shutdown if speed switch
is connected to the fuel shutoff solenoid and/or air
inlet shutoff solenoids.
5.
To reset speed switch, push in reset button (12). Air
inlet shutoffs must be manually reset.
6.
Slowly turn O.S. (overspeed) adjustment
potentiometer approximately one turn clockwise and
do Steps 3, 4 and 5 again.
NOTE: More adjustment may be needed to get the
correct setting. Turn adjustment potentiometer clock-
wise to increase speed setting and counterclockwise
to decrease speed setting. Turn adjustment
potentiometer very slowly only a small amount at a
time until adjustment is correct.
7.
When the speed setting is correct, install seal screw
(14) for overspeed adjustment hole and install
lockwire and seal.
PROCEDURE B
MAGNETIC PICKUP ADJUSTMENT
MAGNETIC PICKUP
16. Engine flywheel. 17. Locknut 18. Air gap.
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