Check this clearance occasionally with a feeler gauge and if a clearance of less than .007" is found, when the coils on the side being tested are
energized at their normal operating voltage, change out the mechanism.

l4. When new wigwag is installed and at least once yearly thereafter, it must be tested to see that it will operate reliably on its minimum rated operating voltage which is 5.5 volts.

To make this test connect a variable resistance having a capacity of at least 4 amperes in series with the control wire. With the control wire energized and the banner held stationary in the vertical position adjust the resistance so that 5.5 volts is obtained across the magnet coils. Then open the control circuit, let the banner come to rest and again close the control circuit. The wigwag must start in both directions and operate reliably with this amount of resistance in the circuit.

If wigwag fails to meet this test check all features outlined herein and if this fails to correct the conditions, change it out.

15. Should wigwags be encountered in which adjust-ments as outline herein are not obtainable, change them out and send to shop for correction.