After the fixed oil circuit is smooth and there is no air in the diesel engine supply system, the cover plate of the oil pump can be removed, the control handle can be pressed, and the pull rod of the oil pump can be moved to see whether the pull rod is flexible and whether the plunger spring is broken. Under the condition that the pull rod of the automatic loading concrete mixer is flexible and the plunger spring is not broken, the diesel engine can be started to run at a medium speed for 10 minutes. In case of fire break, a copper hammer can be used to tap the large nut of the oil pump gently while listening to the sound of the diesel engine. If the sound is not normal, it means that the piston and the pushrod of the oil pump are jammed and repaired or replaced.
Remove the fuel injector assembly and rotate the crankshaft for several turns, i.e. there is water ejecting, indicating that there is crack or sand hole in the cylinder head and cylinder block. In this case, explain to the user or report to the automatic feeding mixer company. After the low-pressure oil flow is smooth, the air in the oil circuit can be removed by hand pump, and the air bleed screw of the pump head can be opened until there is no bubble, then the air bleed screw can be tightened.
The nozzle is not atomized, the plunger spring and spring seat of the oil pump are broken, stuck and do not work, or there is water in the diesel oil. Remove the nozzle assembly to check the opening pressure and atomization. If the nozzle assembly is normal, the user can use clean diesel oil to fill the pot and use the side connection method of the oil circuit to conduct the test. Turn on the oil tank switch of the automatic feeding mixer, remove the oil inlet pipe of the oil delivery pump, and check the oil flow. If the oil flow is fast, it indicates that it is normal. If the oil flow is intermittent, check the oil circuit continuously.
Correct operation procedure of automatic loading mixer
The flexible and correct operation methods of the automatic feeding mixer can be summarized as follows: one light, two stable, three departures, four attendance, five coordination and six prohibitions.
First light: during the operation of the automatic loading mixer, keep the heel close to the floor of the cab, keep the foot plate parallel to the accelerator pedal, and press the oil pedal gently.
Two stable: in the operation of the automatic feeding mixer, the accelerator should always be stable. In general operation, the throttle opening is about 70%.
Three off: during the operation of the automatic feeding mixer, the foot plate shall be separated from the brake pedal and placed on the floor of the cab, never on the brake pedal. The automatic loading mixer often works in the uneven construction site. If the foot is always on the brake pedal, the body will move up and down, which will cause the driver to step on the brake pedal unwittingly. In general, it is necessary to control the engine condition and shift by controlling the throttle deceleration. This not only avoids the brake system overheating caused by frequent braking, but also brings convenience for the rapid speed-up of the automatic feeding mixer.
Siqin: during the operation of the automatic loading mixer, especially in the digging operation, the bucket shall be full of materials by turning the lifting and turning control levers circularly when the accelerator is stable. Lift and turn the bucket control lever cycle pull is called "frequently.". This process is very important and has a great impact on fuel consumption.
5. Coordination: coordination is the organic coordination of lifting and rotating bucket control bars. In the general digging process of the automatic loading mixer, the bucket is first placed on the ground, and it drives smoothly to the pile. When the parallel shovel of the bucket encounters resistance to the material pile, the principle of first lifting the arm and then retracting the bucket shall be followed. In this way, the resistance on the bottom of the bucket can be effectively avoided, so as to give full play to the maximum digging force.
6. No: first, no tire slipping. During the operation of the automatic loading mixer, when encountering the resistance and the sudden filling valve, the tire often slips. This phenomenon is usually caused by improper operation of the driver, which increases fuel consumption and damages the tire. Second, it is strictly prohibited to raise the rear wheel. Due to the large digging force of the automatic loading mixer, the driver usually digs the solid raw soil and stone mountain during the operation process, if the operation is improper, the two rear wheels are prone to rise and leave the ground. The landing inertia of this kind of lifting action will cause the edge plate of the bucket to break and the bucket to deform; when the rear wheel is very high, it is easy to cause the welding joints of the front and rear frames and even the plate to break. Third, it is strictly prohibited to impact the pile. Shovel and excavate common materials. The automatic loading mixer can operate in gear II. It is strictly prohibited to use gear II or above to carry out inertial impact on the pile. The correct way is to shift the bucket from gear I to gear I in time when the bucket is close to the pile to complete a shoveling process.
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