TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 14-12. AMBULANCE HEATER FUEL CONTROL VALVE TESTING AND ADJUSTMENT (MODEL 10530A) (Cont'd) 2. Make sure power source is disconnected. Turn two dzus fasteners (3) securing guard (2) to housing (1) and remove guard (2). 3. Loosen nut (4) securing fuel tube (10) to valve outlet port (6) and disconnect fuel tube (10). Connect .187 in. (4.7 mm) diameter fuel tubing to control valve outlet port (6). 4. Disconnect long igniter lead (5) from ignition control unit (11). 5. Close graduated beaker shutoff valve (17) and open fuel container shutoff valve (18). Connect power source. NOTE Have drainage container ready to catch fuel. 6. Position toggle switch (13) on control box (16) to START position. Open bleed valve (8) on control valve (7) to remove air from fuel lines (9). Clo se bleed valve (8) when fuel from outlet port (6) runs free and clear of air bubbles. Position toggle switch (13) to OFF position. 7. Remove fuel tubing from outlet port (6) and connect fuel tube (10) on outlet port (6) with nut (4). 8. Disconnect power source, and connect long igniter lead (5) to ignition control unit (11). 9. Connect power source and place HI-LO switch (15) on control box (16) in LO position. NOTE Ignition time is the interval from activating toggle switch until indicator lamp illuminates. 10. Place and hold toggle switch (13) in START position and record ignition time. During ignition period, check ignition amperage on ammeter (12). 11. If ignition time exceeds three minutes, or if ignition amperage exceeds 15 amperes, repair heater : assembly (para. 14-10). 12. When indicator lamp (14) illuminates, place toggle switch (13) to RUN position. 14-72