Figure 10. Solenoid Resistance Check

Figure 8. S-Series Electric Shut-Off Wiring

TM-5-3820-256-24-5 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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ENGINE DIAGNOSTIC TEST PROCEDURES Section 6 -IMPORTANT- IF THESE RESISTANCE SPECIFICATIONS ARE NOT MET, REPLACE THE SOLENOID. RESISTANCE CHECK (NO POWER TO SOLENOID IGNITION SWITCH OFF) PLUNGER POSITION OHMS OUT 0.2-0.3 IN 18-20 CG-9838 Figure 10. Solenoid Resistance Check NOTE: " AUX" terminal is present only on early model solenoids. INTERNAL SWITCH DESCRIPTION (Refer to Figure 11) The solenoid contains a built-in switch that is activated when plunger nears the bottom of its stroke. The switch button extends from the bottom of the solenoid end cap into the core. The switch should completely return to the "out" position when plunger is out. If switch does not rapidly return to the "out" position, debris has fouled the switch and solenoid must be replaced. Figure 11. Solenoid Internal Switch Button Located in Bottom of Solenoid Core CGES-2404 Printed in United States of America Page 20

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