TM 9-2350-261-34 FUEL FLOW TEST Connect fuel control valve to coolant heaterfuel hose. Fuel pressure must be 3 to 15 psi(21 to 103 kPa), when fuel valve is open.Place fuel control valve outlet over calibratedand overflow containers.Make sure the body of fuel valve isgrounded.Energize fuel valve solenoids. Connect twosolenoid leads to a 24 V dc power source.Solenoids are now open for high heat fuelflow .W A R N I NG10.11.12.Sparks from static electric-ity could cause a tire orexplosion.Make sure toground the coolant heaterbefore you open fuel supplyvalve.Open coolant heater fuel supply valve(page 14-16, 14–31, or 14-47). Bleed fuelhose in a suitable container.After fuel flow is stable, place calibratedcontainer under fuel control valve.Allow fuel to flow for exactly 1 minute thenclose coolant heater fuel supply valve. Con-tainer should contain 14 +2 cubic centime-ters of fuel.13. Repeat steps 1 thru 7 with shutoff solenoidside only of fuel control valve energized with14.15.24 V dc.Calibrated cubic centimeter glass containershould now contain 8.5 +2 cubic centime-ters of fuel.If fuel flow rates are not within limits,adjust flow. Turn adjusting screw to rightto increase and to left to decrease. Adjusthigh heat flow first, then low heat flow.16.17.After fuel flow is adjusted within limits,seal adjusting screw with insulating varnish.If fuel flow cannot be adjusted within limits,replace fuel control valve.LEAK TEST 18.19.20.Repeat high heat fuel flow test. Disconnectboth solenoid leads from 24 V dc powersource.One or two drops of fuel may form aftersolenoid leads are disconnected from powersource. Further leakage is not acceptable.Replace fuel control valve that leaks.GO TO NEXT PAGE14-496. 7. 8. 9.
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