Excavator winter maintenance a few big misunderstandings, dug friends are clear?
The cold winter, the temperature continued to decline, some northern region has started to snow, the cold weather, engineering machinery maintenance is also a scratch, whether in the cold winter should be how to properly maintain the beloved machinery, Guizhou excavator today told us several should pay special attention to avoid in the routine maintenance of the
Misunderstandings, keep in mind.
Misconception: cooling water is premature or not placed
Consequences: crack or sudden crackle in engine block
To be idle before running off, the cooling water temperature is below 60 DEG C, the water is not hot, and then turn off the water. If the premature release of cooling water, the excavator body suddenly by the cold air invasion will produce a sudden contraction, cracks in high temperature. When water remaining in the water body should be completely discharged, so as to avoid the expansion of frozen make the body burst.
Misunderstanding two: improper use of fuel
Consequences: reduce engine life and increase the risk of damage
The liquidity of the diesel low winter temperature variation, the viscosity increases, is not easy to spread, resulting in poor atomization, combustion deterioration, resulting in a decline in the power and economy performance of excavator diesel engine. So the winter should choose low pour point of light diesel oil combustion and good performance. The general requirements of diesel pour point should be lower than the local minimum temperature of 7-10 current season C
Misunderstanding three: ignition starting with open fire
The consequences: heavy destruction of the excavator, light damage to the engine
Don't put the air filter removed, use cotton dipped in diesel ignited in the air inlet pipe made of kindling implement. This combustion start in the startup process, the outside air with dust will be filtered and directly into the cylinder, causing abnormal wear of piston and cylinder parts, which would cause the engine crude,
Damage the machine.
Misunderstandings four: unsuitable starting methods
Consequences: serious damage to the excavator
In winter, some drivers usually start the diesel engine with no water startup (first start, then add the cooling water). It will cause serious damage to the machine and should be banned. Preheat the correct method is: first insulation quilt in the tank, open the drain valve, the continuous injection of 60- into the water tank
70 C clean soft water, touch the drain valve out of the water is hot, and then close the discharge valve, 90-100 DEG C to clean soft water poured into the water tank, and crank crankshaft, the moving parts are properly pre lubrication, and then re start.
Misunderstanding five: neglecting the thermal insulation of the body
Consequences: reducing working life, damaging the engine
Low temperature in winter, easy to make the excavator diesel engine cooling over the working time. So heat preservation is the key to the use of a good diesel engine in winter. In the north, the diesel engine used in the winter should be equipped with cold proof equipment such as insulation cover and heat preservation curtain. In addition, the thermostat plays an important role in the heating up of the diesel engine. We should check the day before the winter
Whether the work of the heater is normal and the failed thermostat should be replaced in time.