Just started, it slammed the throttle. When the loader engine is started, the body temperature is low, the oil viscosity is large, and the fluidity is poor. The oil cannot flow smoothly to the lubrication points in a short time. If the throttle is slammed at this time, the engine speed will rise instantaneously. Although the oil supply and pressure of the oil pump will increase, the requirements of the lubricating oil and oil pressure can not be met in an instant. A good lubricant film produces instantaneous dry friction, resulting in severe wear. The lubrication of each sports pair is poor, and the running resistance will also increase. If the throttle is slammed, the piston, connecting rod and crankshaft will produce severe impact and accelerate the damage of the machine. In addition, for diesel engines equipped with turbochargers, it is easy to damage the oil seal due to poor lubrication, resulting in turbocharger failure and reduced diesel power. Therefore, after the loader is started, it should run smoothly at low speed (about 500 ~ 700 r / min), and it is strictly forbidden to bombard the throttle.
The cooling water is directly replenished during the operation of the loader, and the cooling water is insufficient, which will cause the diesel engine to be dehydrated and overheated. When the diesel engine is directly replenished with cooling water at high temperature, the entire cooling system will instantaneously generate a large temperature difference, causing the cylinder head, cylinder liner, cylinder block and the like to be brittle, causing micro-cracks and gradually leaking cooling water, resulting in oil leakage and gas leakage. Therefore, when the temperature of the diesel engine is too high, it should be operated at a slightly higher speed without load. When the water temperature drops to about 50 °C, turn off the flame, loosen the radiator cover, discharge the water vapor, and slowly inject the cooling water.
The loader is shut down with load or immediately after the operation. The loader stops with load or stops immediately after operation. The cooling system stops working and the heat dissipation capacity drops sharply. The large amount of heat generated by the work can not be dissipated in the vicinity of the heat source, so that the cooling water of the heated parts such as the cylinder head, the cylinder liner and the cylinder body boils, the parts are overheated, and the high temperature is ablated. At the same time, the oil adhering to the surface of the surface is deteriorated, which makes the next startup difficult. In addition, if the diesel engine with a turbocharger suddenly stops, the supercharger will heat up to about 600 °C, which may cause damage to the seal ring. Therefore, the loader should be unloaded before the flameout, and run at no load for 3 to 5 minutes, so that the machine temperature drops below 40 °C, and the water temperature can be stopped below 50 °C.
Before the loader stopped, the throttle was slammed. Many operators mistakenly thought that a few feet of the throttle were slammed before the shutdown, so that excess unburned diesel could be left in the cylinder to facilitate the next start. In fact, this will result in incomplete combustion, black smoke, and increased carbon deposits. At the same time, a few feet of the throttle will suddenly increase the inertial force of the moving parts, which will aggravate the wear of the sports pair; secondly, the unburned fuel will flow along the cylinder wall. The oil pan dilutes the oil to shorten the oil life cycle. Therefore, the correct operation is to stop after a smooth operation at low and medium speeds under no-load conditions.
Slide the shovel into the loader during shifting. During the operation of the loader, many drivers are accustomed to rushing to the pile at the high speed of the machine while shifting the damper. After the natural deceleration, the driver then shovel the material. Using the inertia of driving to the pile will cause the whole machine to be subjected to severe impact, and the components will be unevenly stressed, which is extremely harmful to the whole body. This will cause deformation of the bucket, boom, front frame, etc., and cracks; the transmission and the clutch are suddenly stressed, the torque is increased, the friction plate is easy to slip and twist and deform; the transmission components are also extremely vulnerable. The correct operation is that the loader puts the shift lever in the low gear before the shovel is loaded, and heads toward the pile at the II speed, slowly inserts the pile at the I speed, and gradually increases the throttle for shovel loading.
