TM 9-4310-397-142-2. INDICATORS.The information that follows references the indicator components found in Figure 2-1.a.Ammeter.The AMMETER (11) measures the rate of charge or discharge of the battery, normal operatingreading 0 to +15 amperes.b.Hourmeter.HOURMETER (12) records operating time in hours and tenths of an hour.Figure 2-1. Operator's Controls and Indicatorsc.EngineWaterTemperatureGauge. ENGINE WATER TEMPerature gauge (13) indicates the temperature of theengine coolant. Normal operating range is 180°F to 200°F (82°C to 93°C) and the internal trip sensor is set at 220°F(105°C). The manual reset button must be pressed after temperature drops below this set temperature before enginerestart.d.CompressorOilTemperatureGauge. The COMPRESSOR OIL TEMPERATURE gauge (14) indicates thetemperature of the compressor system oil. Normal operating range is 160°F to 225°F (71°C to 107C). The hightemperature safety switch is set at 230°F (110°C) and will shut off fuel supply to the engine if that temperature isreached. The manual reset button must be pressed after the temperature has dropped before the unit can be restarted.e.EngineOilPressureGauge. The ENGINE OIL PRESSURE gauge (15) indicates the engine lubricating oilpressure. Normal reading is 60 psi to 100 psi (4.2 kg/cm2 to 7.0 kg/cm2).f.EngineFuelPressureGauge. The normal operating range for the ENGINE FUEL PRESSURE gauge (16) is 4 to6 psi. (.28 kgs/cm2 to .42 kgs/cm2).g.ReceiverPressureGauge. The RECEIVER PRESSURE gauge (17) indicates the air pressure in the oilseparator tank. Normal operating range is 70 to 120 psi. (4.9 kgs/cm2 to 8.4 kgs/cm2).2-3
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