There is a large amount of ore in the direction of truck
Publish: 2021-04-22 23:13:55
1. Do what? Main work
2. See if the joint is loose
3. The reasons for the truck sinking in the direction are as follows:
1) booster pump failure
when the pump pressure of the booster pump can not reach the standard value through the test, it is obvious that the heavy direction is related to this. First of all, check whether the meshing surface of flow control valve and valve seat and the steel ball of safety valve are not tightly sealed. If the flow valve or safety valve leaks, it can be repaired by grinding. Secondly, check whether the spring of the safety valve is invalid. This can be checked by adding a gasket at the back of the spring. If a gasket is added at the back of the spring, the maximum pump pressure increases obviously, indicating that the spring is invalid. If there is no problem in both parts, the booster pump should be disassembled to observe whether the cavity wall of the vane pump is worn and strained. The high and low pressure cavities will be connected because of the cavity wall strain, resulting in the pressure can not be established. Generally, the cause of strain is oil. If the direction is suddenly heavy, check whether it is caused by the fracture of the pump shaft
2) steering gear fault
if it is found that the steering gear power oil pressure is low, the steering gear is the cause of heavy direction. At this time, professional manufacturers should be invited to repair. Generally speaking, most of the faults of the steering gear are caused by the piston, cylinder pulling, or the damage of the sealing ring on the piston, resulting in the communication between the two cavities of the piston, so that the boost pressure can not be effectively established. In addition, all kinds of sealing rings on the circumferential surface of the piston and the sealing rings on the steering screw are damaged, which will also cause high-pressure unloading and lower the boost pressure
3) lack of oil, air in the system
if there is air in the system e to lack of oil in the power system, the steering is not only heavy, but also noisy. At this time, exhaust according to the procere of refueling and venting
4) the oil return filter in the oil storage tank is blocked
the oil return filter in the oil storage tank is not maintained or replaced for a long time, which causes blockage, hinders the circulation of power oil, increases the back pressure of oil return, and also makes the direction heavy
5). The sealing rings of the two limit valves failed, resulting in the communication between the two cavities of the piston, resulting in the power failure.
1) booster pump failure
when the pump pressure of the booster pump can not reach the standard value through the test, it is obvious that the heavy direction is related to this. First of all, check whether the meshing surface of flow control valve and valve seat and the steel ball of safety valve are not tightly sealed. If the flow valve or safety valve leaks, it can be repaired by grinding. Secondly, check whether the spring of the safety valve is invalid. This can be checked by adding a gasket at the back of the spring. If a gasket is added at the back of the spring, the maximum pump pressure increases obviously, indicating that the spring is invalid. If there is no problem in both parts, the booster pump should be disassembled to observe whether the cavity wall of the vane pump is worn and strained. The high and low pressure cavities will be connected because of the cavity wall strain, resulting in the pressure can not be established. Generally, the cause of strain is oil. If the direction is suddenly heavy, check whether it is caused by the fracture of the pump shaft
2) steering gear fault
if it is found that the steering gear power oil pressure is low, the steering gear is the cause of heavy direction. At this time, professional manufacturers should be invited to repair. Generally speaking, most of the faults of the steering gear are caused by the piston, cylinder pulling, or the damage of the sealing ring on the piston, resulting in the communication between the two cavities of the piston, so that the boost pressure can not be effectively established. In addition, all kinds of sealing rings on the circumferential surface of the piston and the sealing rings on the steering screw are damaged, which will also cause high-pressure unloading and lower the boost pressure
3) lack of oil, air in the system
if there is air in the system e to lack of oil in the power system, the steering is not only heavy, but also noisy. At this time, exhaust according to the procere of refueling and venting
4) the oil return filter in the oil storage tank is blocked
the oil return filter in the oil storage tank is not maintained or replaced for a long time, which causes blockage, hinders the circulation of power oil, increases the back pressure of oil return, and also makes the direction heavy
5). The sealing rings of the two limit valves failed, resulting in the communication between the two cavities of the piston, resulting in the power failure.
4. 1. The steering oil is too dirty. Power oil is a force transmission medium. If the oil is too dirty, it will cause poor circulation and general direction difficulty. More serious steering pump will "buzz"
2. Lack of booster oil or oil leakage. If the power supply oil is gone, it is equivalent to no power supply. Check the relevant system for signs of oil leakage. Focus on the inspection of power steering oil pot, power steering oil pipe and steering gear
3. If the engine power belt is too loose or tight, or the belt is aging, the tightness can be adjusted, and the aging belt can only be replaced
4. The bearings of the steering system are too tight or poorly lubricated; The steering tie rod ball joint is too tight or short of oil; The bending of the steering shaft and sleeve causes the sticking, which is the mechanical failure of the steering system. Some cars can adjust the clearance, but most of them can't; It is generally recommended to replace the steering rod ball joint; If the steering shaft and casing are bent, it is unlikely to be damaged unless there is a serious accident or man-made accident
5. The front axle or frame is bent and deformed. Some of them can be adjusted through sheet metal. It is recommended to replace them most of the time
6. The front wheel toe in is too tight, so four-wheel alignment is needed
7. The tire pressure is insufficient. In fact, this is the first thing to check and is the easiest to judge. However, it needs the help of a barometer. This change is not very obvious and cannot be observed with the naked eye.
2. Lack of booster oil or oil leakage. If the power supply oil is gone, it is equivalent to no power supply. Check the relevant system for signs of oil leakage. Focus on the inspection of power steering oil pot, power steering oil pipe and steering gear
3. If the engine power belt is too loose or tight, or the belt is aging, the tightness can be adjusted, and the aging belt can only be replaced
4. The bearings of the steering system are too tight or poorly lubricated; The steering tie rod ball joint is too tight or short of oil; The bending of the steering shaft and sleeve causes the sticking, which is the mechanical failure of the steering system. Some cars can adjust the clearance, but most of them can't; It is generally recommended to replace the steering rod ball joint; If the steering shaft and casing are bent, it is unlikely to be damaged unless there is a serious accident or man-made accident
5. The front axle or frame is bent and deformed. Some of them can be adjusted through sheet metal. It is recommended to replace them most of the time
6. The front wheel toe in is too tight, so four-wheel alignment is needed
7. The tire pressure is insufficient. In fact, this is the first thing to check and is the easiest to judge. However, it needs the help of a barometer. This change is not very obvious and cannot be observed with the naked eye.
5. Basically, the total number of turns of the left and right rudders of the steering wheel is 3, 540 degrees on the left and 540 degrees on the right, and the steering limit angle of the front wheel is about 60-70 degrees. If the steering wheel turns half a turn, the front wheel basically turns more than 20 degrees
for reference only~~
for reference only~~
6. The clearance of the steering gear itself can be adjusted, but if it is adjusted too tightly, the direction will become heavy. However, if the interior of the steering gear itself has been seriously worn, it has no maintenance value, so it has to be replaced. Because if there is serious wear and tear, the cost of maintenance is more expensive than buying a new one, so there is no need to repair it. Right!
7. Check the left and right main bearings. It's estimated that you haven't buttered for a long time? As long as one of the bearings is rusty, your car will be heavy, otherwise the steering gear will hang up. The ball head will not cause the direction to be heavy, generally it will only send cards
8.
The power oil is insufficient. It is recommended that the user replace the power oil. The long-term use of the power oil may cause the power oil to be unclean. In this case, the power oil should be replaced as soon as possible to ensure the normal driving of the car
When the steering wheel is not easy to use, it is necessary to check if there is a problem with the booster and drive the car to the repair shop for professional maintenance 
extended data:
precautions:
always check the protective sleeve on both sides of the steering gear and the protective sleeve on the upper part of the steering gear connected with the universal cross shaft. The damage of the sheath is the most important factor leading to the early wear and damage of the steering gear. After the jacket is damaged, water, st and sand will enter into the steering gear through the damaged part, damaging the grease film of the rack and pinion, resulting in corrosion, abnormal wear and other phenomena inside the steering gear
if the internal water and sand are not disposed of immediately, the steering gear will be scrapped in a short time. So check the status of the st jacket at least once a month. If the jacket is damaged, it must be replaced immediately, and the steering gear shall be checked and maintained comprehensively before replacement
9. It depends on where you changed it. According to the formal requirements, you need to do four-wheel positioning after changing the steering gear. If you are in the 4S store, it is estimated that it will take about 300. The general store outside is estimated that it will take about 180. I hope it can help
Hot content