The treatment and solution of high oil and water temperature in the pump truck of Baotou Beiben Heavy Duty Truck Accessories: During the construction operation of concrete pump trucks, high oil or water temperature in the engine is a common phenomenon. So, what should be done when the oil temperature and water temperature of the engine are both too high?

To cure the problem of fever, the first step is to identify the cause of the pump truck's illness:

water temperature is high

Why is the water temperature high?

The function of the water tank is to dissipate heat, and the principle is to continuously export heat through the engine fan.

Common problems with high water temperature:

1. The thermostat is stuck and cannot be turned on. At this point, water can only circulate through a small loop and does not pass through the radiator.

2. The inside of the water tank is dirty and the water is not flowing smoothly. You can use a temperature measuring gun to check the temperature of the upper and lower parts of the water tank. If it is blocked, the temperature below will be very low.

3. Insufficient fan speed, clutch malfunction.

4. If the rubber strip around the radiator of Baotou Beiben Heavy Duty Truck parts is damaged or missing, it will generate eddy currents and hot air circulation, which cannot achieve cooling effect.

5. For the fifth point, it is easy to overlook whether there will be false alarms or if the sensor is broken, which is also possible. Computers are very rigid and only look at data without considering the actual situation.

High oil temperature

The problem of high oil temperature and high water temperature is similar, with both large and small cycles, but it does not pass through the thermostat. It has a return oil one-way valve. If this valve gets stuck, the oil temperature will be high, and everything else will be the same as the water temperature.

Based on years of experience, when the oil and water temperatures of the engine are both too high, if there is sufficient or insufficient oil and water, the oil temperature should be lowered first and then the water temperature. The reason for this is definitely not that oil is more expensive than water.

1. Excessive oil temperature directly endangers the engine

The so-called high engine temperature refers to the oil and water temperature of the engine exceeding 90 ℃. Due to the principle of thermal expansion and contraction, an increase in temperature can easily cause a reduction in engine clearance, resulting in severe wear or cylinder pulling.

When the heat generated by excessive wear exceeds the heat dissipation capacity, the temperature of the bearing shell will rise, and the local temperature will reach the melting point of lead. The lead and copper in the bearing shell will melt, ultimately leading to serious burning of the crankshaft and bearings or the occurrence of "bearing hugging the shaft", with unimaginable consequences.

Therefore, when the temperature of oil and water is too high at the same time, the oil temperature should be lowered first.

2. Lowering oil temperature can slow down the rate of water temperature rise

The function of the Baotou Beiben Heavy Duty Truck parts water tank is to reduce the engine oil temperature. Reducing oil temperature usually adopts the method of "reducing load and low speed". At this point, although the heat exchange time of the coolant at the high-temperature parts is long, the water flow rate slows down, prolonging the heat dissipation time. At the same time, due to the decrease in load and speed, the heat generated by the friction of various moving parts also decreases accordingly.

So, lowering the oil temperature not only reduces the heat generated by the engine, but also indirectly reduces the heat absorbed by the coolant, thereby slowing down the rate of water temperature rise.

3. Oil temperature is one of the main factors affecting oil pressure

When the engine oil temperature is too high, not only does it increase fuel consumption (leakage, evaporation, combustion), but it also affects the quality of the engine oil. Baotou Beiben Heavy Duty Truck parts make it difficult to form and maintain oil films on the friction surfaces of various engine components, resulting in the inability to establish oil pressure in the main oil passage, thereby exacerbating component wear.

The effect of water temperature on oil pressure must be achieved through oil temperature. So, it has a certain degree of indirectness and requires a certain amount of time.

4. Lowering the water temperature first has a significant impact on the establishment of oil pressure in the engine spindle oil passage

As is well known, precipitation temperature is generally achieved by reducing load and increasing rotational speed. When the speed is too high, it will increase the inertia and centrifugal force of the piston connecting group, causing an increase in the load on the crankshaft bearings.

At the same time, the relative friction speed between the journal and the bearing shell will also increase, resulting in an increase in heat generated per unit time, a decrease in oil volume in the oil pump, and a large amount of oil being thrown out of the main oil passage, leading to increased wear on the friction surfaces of various components due to insufficient lubricating oil, and further increase in oil temperature.

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