25. When carrying out various adjustment work, it may be necessary to accurately know the temperature of the impellent oil.
26. The oil temperature must be measured in the engine crankcase at a level of approximately 1 cm from the bottom of the crankcase. The measurement is made with a special device (see resist. illustration), for which it is necessary to insert the measuring probe of the device into the guide tube of the dipstick for measuring the level of impellent oil and push it until it touches the bottom of the crankcase, and then pull it out by about 1 cm.
27. To prevent air from being sucked through the guide tube, the hole must be closed with a rubber stopper.
28. Oil temperature depends on engine load. The value of 80°C corresponds to the normal operating temperature of the engine. Under extreme load, the oil temperature can reach 150°C.
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