TM 5-4310-452-142-2. CONTROLS AND INDICATORS.KeyComponentDescription1Discharge PressureIndicates the pressure of air leaving the compressor. Should be 80-120 psi (552-827kPa).2Tach/HourmeterThe tachometer portion indicates the engine speed in revolutions per minute (rpm).The hourmeter portion of this gage indicates and records the total number of hoursof actual operation.3Engine Oil PressureIndicates engine oil pressure. Normal engine oil pressure is 60-80 psi (414-552kPa).4Fuel PressureIndicates engine fuel pressure. Normal fuel pressure is 4-6 psi (28-41 kPa).5Fuel LevelIndicates how much fuel is in the fuel tank.6AmmeterIndicates if the alternator function is normal. Needle should indicate on the positive(+) side of "0" while the compressor unit is running.7Compressor Oil Tempindicates compressor oil temperature. Should indicate 150°-230°F (66°-110°C).TA5053942-2
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