TEST/INSPECTION - TM-5-4320-302-14

TM-5-4320-302-14 Forward Area Water Point Supply System (FAWPSS) Model WP55100 NSN 4320-01-168-1629 and Model 9095-91 NSN 4320-01-338-3305 Manual
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TM 5-4320-302-14 4-35. ENGINE SHUTDOWN VALVE (CONT) Location/Item Action Remarks 3. Engine shut- Remove breather plug, washer, down valve and banjo bolt from fuel in- jection pump by rotating counterclockwise. Remove and discard washers. TEST/INSPECTION 4. Engine shut- Electrically test operation of engine shutdown down valve valve and valve solenoid. Connect pin (P2) to ground. Intermittently apply +12 vdc to pin 1 (P1). The valve should normally be open with +12 volts applied to pin 1 (P1) but should close when no voltage is applied to pin 1 (P1). These signals simulate the engine fault sensi- tive control signals from the control panel. Test valve is open when an electrical signal (+12 vdc) is applied to the valve solenoid pin 1 (P1), simulating the reset signal. If either malfunction, replace engine shutdown valve and solenoid. 5. Engine shut- Inspect valve, breather plug, and banjo bolt down valve for damage, rust, corrosion, or restrictions in fuel flow. If damaged, severely rusted, or cor- roded, replace valve. If valve needs to be ad- justed, follow adjustment procedure below. Inspect electrical contacts on both ends of electrical connectors at engine shutdown valve. Inspect wiring to and from control panel. For connections at control panel, follow procedures in paragraphs 4-15 and 4-16. If any electrical problems or malfunctions exist, replace wiring and/or connectors as necessary. 4-167

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