M43TU engine
Emergency oil pressure sensor
1. Unscrew the oil filter cap and allow the oil from the filter to drain into the sump. This will reduce oil loss when the sensor is turned out.
2. Remove generator (see chapter 5A) and its support bracket, then disconnect the sensor electrical connector and unscrew the sensor from the base of the oil filter housing (pic. 22.2).
3. Screw in the new sensor and tighten it to the required torque.
4. Connect the sensor connector. Reinstall the alternator with the bracket and the oil filter cover. Check the oil level (see Weekly checks).
Emergency oil level sensor
5. Drain engine oil as directed in chapter 1.
6. Remove the crankcase protection from under the engine.
7. Disconnect the electrical connector of the sensor, unscrew the three nuts and remove the oil level sensor (pic. 22.7).
8. Clean mating surfaces of sump and sensor.
9. Place a new seal on the sensor, apply anti-twist compound to the threads of the sensor studs, screw on the nuts and tighten them securely.
10. Install a crankcase under the engine and fill the engine with oil.
N42 engine
Emergency oil pressure sensor
11. The emergency oil pressure contact sensor is located on the left side of the engine, behind the generator. Remove the alternator as directed in chapter 5A.
12. Disconnect the electrical connector from the sensor and unscrew the sensors of the cylinder block (pic. 22.12). Get ready for an oil leak.
13. Install the sensor in reverse order. Replace the sealing washer under the sensor. Tighten the sensor to the required torque.
Emergency oil level sensor
14. The procedure for removing and installing this sensor is similar to that described in paragraph 8. 5-10 for the M43TU engine.