A dump semi-trailer is a vehicle that unloads the goods by itself by hydraulic or mechanical lifting. It is composed of chassis, hydraulic lifting mechanism, cargo box, and power take-off device.
The carriage of the dump truck is divided into two types: rearward tipping and sideward tipping. The movement of the piston rod is controlled by the control system.
Operating procedures
1. Do not suddenly push the lifting handle to the "lowering position" in the middle of full-load lifting.
If such an operation error occurs, the carriage will suddenly rush down, which will bring a great impact on the frame, and even cause an accident. Therefore, the above-mentioned operations should be avoided as much as possible. If there are special circumstances, it must be operated carefully, the descent speed should be slowed down as much as possible, and the carriage must not be suddenly dropped to the bottom.
2. It is not allowed to use the slam-lift truck - slam the brakes to unload the goods.
Due to the large inertial force (usually 5~20 times of the rated lifting force), it is very easy to cause permanent deformation of the frame, welding of the carriage and the auxiliary frame, burning of the oil pump, damage to the sealing ring, damage to the hydraulic cylinder, etc. , the service life of the vehicle is reduced, and in severe cases, a rollover accident will occur. Therefore, it is generally forbidden to drive the dump truck when it is lifted.
3. After the dump truck unloads the goods, the power take-off must be disengaged before driving.
If this operation error occurs, when the dump truck is driving, since the power take-off is in the "engaged" position, the lift oil pump will run at high speed for a long time without load in the "small cycle" state. As a result, the temperature of the hydraulic oil rises rapidly, which is easy to cause damage to the oil seal of the oil pump, and even the phenomenon of "burning out" of the oil pump; more seriously, the operation of the oil pump means that the hydraulic system has a power source, and it is easy to cause the carriage to automatically rise during the driving process. accident.
4. The power take-off cannot be in the "on" position when driving.
If it is in the "on" state (the red light is on), the oil pump will continue to rotate, and the hydraulic system will have a power source, which will cause the carriage to automatically lift due to misoperation on the air control valve; Even if the control distribution valve is in the "down" position, the oil will enter the oil pump, which will cause the oil pump to burn out.
Maintenance Tips
1. The new dump truck or the overhauled truck must be tested to make the lifting process of the carriage smooth and without movement.
2. The lubricating oil should be correctly selected for each part according to the regulations, which greatly saves unloading time and labor, and the lifting mechanism should replace the oil on schedule.
3. Ship according to the rated load, and overload is strictly prohibited.
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The carriage of the dump truck is divided into two types: rearward tipping and sideward tipping. The movement of the piston rod is controlled by the control system.
Operating procedures
1. Do not suddenly push the lifting handle to the "lowering position" in the middle of full-load lifting.
If such an operation error occurs, the carriage will suddenly rush down, which will bring a great impact on the frame, and even cause an accident. Therefore, the above-mentioned operations should be avoided as much as possible. If there are special circumstances, it must be operated carefully, the descent speed should be slowed down as much as possible, and the carriage must not be suddenly dropped to the bottom.
2. It is not allowed to use the slam-lift truck - slam the brakes to unload the goods.
Due to the large inertial force (usually 5~20 times of the rated lifting force), it is very easy to cause permanent deformation of the frame, welding of the carriage and the auxiliary frame, burning of the oil pump, damage to the sealing ring, damage to the hydraulic cylinder, etc. , the service life of the vehicle is reduced, and in severe cases, a rollover accident will occur. Therefore, it is generally forbidden to drive the dump truck when it is lifted.
3. After the dump truck unloads the goods, the power take-off must be disengaged before driving.
If this operation error occurs, when the dump truck is driving, since the power take-off is in the "engaged" position, the lift oil pump will run at high speed for a long time without load in the "small cycle" state. As a result, the temperature of the hydraulic oil rises rapidly, which is easy to cause damage to the oil seal of the oil pump, and even the phenomenon of "burning out" of the oil pump; more seriously, the operation of the oil pump means that the hydraulic system has a power source, and it is easy to cause the carriage to automatically rise during the driving process. accident.
4. The power take-off cannot be in the "on" position when driving.
If it is in the "on" state (the red light is on), the oil pump will continue to rotate, and the hydraulic system will have a power source, which will cause the carriage to automatically lift due to misoperation on the air control valve; Even if the control distribution valve is in the "down" position, the oil will enter the oil pump, which will cause the oil pump to burn out.
Maintenance Tips
1. The new dump truck or the overhauled truck must be tested to make the lifting process of the carriage smooth and without movement.
2. The lubricating oil should be correctly selected for each part according to the regulations, which greatly saves unloading time and labor, and the lifting mechanism should replace the oil on schedule.
3. Ship according to the rated load, and overload is strictly prohibited.
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