INSTRUMENTS AND GAUGES TESTING AND ADJUSTING CHART FOR TESTING TEMPERATURE GAUGE GAUGE TEST TEST PART NUMBER VOLTAGE RESISTANCE TEMPERATURE SENDER *RESISTOR 14 349 Ohms 38°C (100F) 5L7443 NONE 5L7446 14 84 Ohms 77°C (170°F) 5L7443 NONE 14 30 Ohms 116C (240°F) 5L7443 NONE 28.5 3388 Ohms 38C (100F) 5L7442 5L7441 5L7444 28.5 1050 Ohms 77°C (170°F) 5L7442 5L7441 28.5 460 Ohms 116°C (240°F) 5L7442 5L7441 *In 32 volt systems the resistor is needed. CHART FOR TESTING OIL PRESSURE GAUGE GAUGE TEST TEST PART NUMBER VOLTAGE RESISTANCE PRESSURE SENDER *RESISTOR 14 0 Ohms 0 kPa (0 psi) 5L7450 NONE 5L7455 14 13.5 Ohms 140 kPa (20 psi) 5L7450 NONE 14 30 Ohms 550 kPa (80 psi) 5L7450 NONE 28.5 0 Ohms 0 kPa (0 psi) 5L7450 5L7441 5L7456 28.5 13.5 Ohms 140 kPa (20 psi) 5L7450 5L7441 28.5 30 Ohms 550 kPa (80 psi) 5L7450 5L7441 *In 32 volt systems the resistor is needed. MECHANICAL GAUGES FOR TEMPERATURE To check these gauges, put the bulb of the gauge in a pan of oil.  Do not let the bulb touch the pan.  Put a thermometer in the oil to measure the temperature. Make a comparison of temperatures on the thermometer with the temperatures on the direct reading gauge. DIRECT READING GAUGE MECHANICAL GAUGES FOR OIL PRESSURE To check these gauges connect the gauge to a pressure source that can be measured with accuracy.  Make a comparison of pressure on the gauge of test equipment with the pressures on the direct reading gauge. DIRECT READING GAUGE 78