The hydraulic pump is one of the important parts of the hydraulic roller. Because of the different use conditions of the roller, the hydraulic parts will inevitably have some small problems, and then the hydraulic pump will be replaced and have problems after the heavy work. After replacing the hydraulic pump, some friends will find that the hydraulic pump they just replaced is still problematic. Today, Hongkai editor will give you a brief introduction to the replacement of hydraulic pump of full hydraulic roller.
Full hydraulic roller
Notes for replacing hydraulic pump of full hydraulic roller:
1. Pay attention to the hydraulic display
After replacing the hydraulic pump of construction machinery, attention should be paid to the hydraulic display, and the pressure display value of the hydraulic circuit should be observed at any time. Check and replace the pressure switch after the hydraulic pump, pay attention to observe the vibration and stability, check whether the hydraulic circuit is abnormal, and solve the problems in time if found.
2. Pay attention to observation in the first three months
After the replacement of hydraulic pump for construction machinery, attention should be paid to the cooperation between the replaced hydraulic pump and various components within three months. Because the newly replaced pump and other parts need a running in period, avoid violent operation as much as possible during operation. In addition, we should also pay attention to the inspection of normal operation conditions and machine parts maintenance, whether the screw is loose, whether the oil temperature is normal, whether there is abnormal increase, whether the hydraulic oil is contaminated rapidly, whether the hydraulic system is weak? Moreover, during the running in period of the hydraulic pump, it is easy to be affected by bubbles and dust, which is easy to produce various problems, which should be solved in time.
3. Pay attention to the change of oil temperature
After replacing the hydraulic pump of construction machinery, do not immediately apply a large load when starting again, especially when it is used in freezing and cold seasons, no load Idling (about 10-30 minutes) is allowed to enter the state before normal loading. In addition, we should also pay attention to the change of oil temperature of high and low polarization, and observe the relationship between oil temperature and external environment temperature. If there is any abnormality, it is easy to judge and solve the problem. After replacing the hydraulic pump of construction machinery, the change of hydraulic oil should be checked regularly, and the deterioration, discoloration and pollution of hydraulic oil should be detected every one or two months, and corresponding solutions should be taken according to the change degree.
4. Pay attention to the sound of hydraulic pump
After replacing the hydraulic pump of construction machinery, pay attention to the sound of the hydraulic pump when it works. Once abnormal phenomena are found, the problem should be found out according to the circuit diagram. Some old hands can directly judge what parts of the hydraulic system have problems through the abnormal sound of the hydraulic system when the hydraulic pump is working, stopped, under high load and high temperature.
When the small roller is rolling the road surface, such as asphalt pavement, attention should be paid to the operation, especially the novice friends. When rolling the road surface, the roller should master some rolling skills if it wants to avoid the problems of softening, oil spilling and moving. In order to help everyone to have good strength when rolling the road surface, Hongkai road roller manufacturer will introduce the rolling skills and precautions of small road roller, hoping that you can follow the following skills for rolling.
Small roller
1、 Rolling skills of small roller
1. Initial pressure
1. Before construction, check whether the working machinery is dry, so as to avoid uneven or displacement of asphalt mixture during rolling.
2. The small roller is easy to climb. When rolling up the slope, the speed must be stable when stopping and accelerating, not too fast or too slow. Only when the temperature of asphalt reaches the specified low temperature can it be compacted by vibration.
3. The driving wheel of the roller shall be at the back whether it is rolling up or down the slope.
4. In case of steep slope, the light roller shall be used for pre compaction first, and then the heavy roller or vibrating roller shall be used for compaction.
5. When the temperature is higher than 150 ℃, first use a small roller to static pressure 1-2 times, and control the speed between 1.5 km / h and 2 km / h. When rolling, the driving wheel faces the paver, and when rolling the ramp, the driving wheel is in the low position.
2. Recompression
The re compaction shall be carried out immediately after the initial compaction, and the re compaction temperature shall not be lower than 125 ℃. Firstly, the small roller shall be used for 4 times of rolling, with the rolling speed of 4 km / H-5 km / h, and then the small roller shall be used for 6 times, with the re rolling speed of 3.5 km / h-4.5 km / h. According to the compaction situation, the number of rolling passes shall be increased by 1-2 times.
3. Final pressure
When the mixture is cooled to the specified low temperature, then static preloading is carried out, and vibration compaction is adopted only when the mixture temperature drops to the lower limit (120 ℃). It is carried out immediately after the re compaction. The vibration of small roller is closed, and the speed is controlled at 2km / H ~ 3km / h static pressure for two times, until the road surface is free of wheel trace. When the final compaction is completed, the temperature is not lower than 110 ℃. After completion, stop the vibration first, then place the reversing mechanism in the middle position, the transmission in the neutral position, pull the hand brake control lever, and the internal combustion engine will stop after idling for several minutes.
2、 Precautions for rolling
1. When going downhill, be careful not to change speed suddenly. If the slope is very steep, the use of small rollers can not be solved at one time, at this time, we can choose the heavy roller to complete.
2. It is necessary to check the connection and fixation status of all parts of the small roller, check whether the damping block is in normal compression status, check whether the bearing seat is loose, and replace it in time if the parts are damaged;
3. It is very necessary to clean the small road roller in time. It is necessary to eliminate the sediment on the appearance, do not get the dirt into the air filter, and also need to scrub the dust and oil dirt on the engine and parts.
4. Check the engine oil, fuel, etc. in time and add them to the indicated scale as required.
5. Also check the roller for signs of oil leakage;
6. In addition, lubricating oil should be added in time to check whether the tire is damaged and whether the air vent is blocked. Also check the sprinkler system, joints and filters for damage.
7. When rolling, the vibration frequency should be consistent. For your adjustable vibratory roller, the vibration frequency should be adjusted before operation. It is not allowed to adjust the vibration frequency without vibration.