Oil Pressure Sending Unit
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| Illustration 1 | g00509921 |
(1) Terminal (2) Fitting | |
- Connect the sending unit to a pressure source that can be measured with accuracy.
- Connect an ohmmeter between fitting (2) and terminal (1) .
- Take resistance readings at the pressure shown in Specifications, "Engine Oil Pressure Sender".
- If a unit does not have the correct resistance readings, replace the unit.
Water Temperature Sending Unit
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| Illustration 2 | g00509920 |
(1) Terminal (2) Nut (3) Bulb | |
- Connect an ohmmeter between terminal (1) and nut (2). Put bulb (3) in a pan of water. Do not let the bulb have contact with the pan.
- Put a thermometer in the water to measure the temperature.
- Take resistance readings at the temperatures shown in Specifications, "Water Temperature Indicator".
- If a unit does not have the correct resistance readings, replace the unit.
Electric Indicators
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| Illustration 3 | g00510277 |
- Put the indicator in position with the letters horizontal and the face 30 degrees back from vertical.
- Connect the indicator in series with the power source and the middle test resistance shown in the table.
- Let the indicator heat at the middle resistance for five minutes, then check the pointer position for all of the resistance given.
Mechanical Indicators for Temperature
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| Illustration 4 | g00505617 |
| Pointer Positioner | Test Thermometer Temperature Reading | |
| °F | °C | |
| 1 | 210 to 218 | 98.9 to 103.3 |
Two types of mechanical indicators are available. The first type has a direct reading face. The second type has color codes on the face to show different ranges of operation. White, green and red show the cold, normal and hot ranges respectively.
To check these indicators, put the bulb of the indicator 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 indicator. Refer to Specifications, "Water Temperature Indicator" for the calibration table.
Mechanical Indicators for Oil Pressure
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| Illustration 5 | g00505699 |
| Pointer Positioner | Test Gauge Pressure Reading | |
| psi | kPa | |
| 1 | 5 ± 1 | 35 ± 7 |
| Pointer Position | Test Gauge Pressure Reading | |
| psi | kPa | |
| 1 | 10 ± 1 | 70 ± 7 |
| 2 | 20 ± 1 | 140 ± 7 |
Two types of mechanical indicators are available. The first type has a direct reading face. The second type has color codes on the face to show different ranges of operation. Red, white and green show the low pressure, pressure at low idle and normal pressure ranges respectively.
To check these indicators connect the indicator to a pressure source that can be measured with accuracy. Make a comparison of pressure on the indicator of test equipment with the pressures on the direct reading indicator. Refer to Specifications, "Engine Oil Pressure Indicator" for the calibration table.