With the development of the automotive industry, the car has become the main travel tool for people. The steering system of the car is also one of the most important control systems for the car. Then the development of the car is followed by many novice drivers. Many novice drivers are not very Understand, the relevant knowledge of the car, when the car fails, it will be helpless, do not know how to do it, the following is a small series of car owners to sort out some knowledge about the convenience of the car, the diagnosis and troubleshooting of the car steering booster pump, To help the novice drivers, become an old driver as soon as possible. Vehicles that use hydraulic steering systems are more common and complex due to heavy direction, deviation, and trembling. It is also difficult for the repairman to eliminate it. It is often the reason for the failure to use the replacement test. In this way, the steering assist pump is inevitably a victim of test or innocent. This is particularly evident in the three-pack service, which has a high return rate and has caused great losses to dealers and manufacturers. cause of issue: 1. The filter element is clogged, and the oil pipe is blocked due to the rubber being resistant to corrosion; Method of exclusion: 1. Clean the filter element with alcohol, replace the oil pipe, and add hydraulic oil to the specified position; 4. Repair the booster pump and replace the oil seal. The above is a series of questions about the fault diagnosis and elimination of the car steering booster pump compiled by the riders. I hope that the riders can understand the problems in this way and facilitate the repair when the car has problems.
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Therefore, Zhengda Fortis technical service personnel introduces the performance, working principle and troubleshooting methods of the automobile hydraulic steering system to the users.
The car steering booster pump, we usually call it the steering assist pump, which is the power source for the car's steering assist system and the heart of the steering system. For heavy-duty vehicles, the hydraulic steering system is even more important because of the mechanical steering and the high labor intensity of the driver. The steering wheel booster pump commonly used in automobiles is divided into two types: vane type and gear type. The blade type power steering pump will be highlighted here. The general vane pump is composed of a pump body with a double arc curve in the inner cavity, a grooved rotor, and a blade. Some are mounted on the flywheel housing at the rear of the engine and are also driven by timing gears. When the engine is running, the rotor of the booster pump is driven to rotate, and the blade moves outward along the blade groove under the action of the centrifugal force, and abuts against the inner wall of the pump body, and the volume of the closed space between the blades continuously increases and decreases during the rotation of the rotor. , the process of oil absorption and oil pressure is realized. Each revolution of the rotor completes oil absorption and oil pressure twice. There is also a safety valve in the pump body to limit the pressure. When the external load of the steering system increases, causing the oil pressure to rise to a certain value, the safety valve opens to remove the load. A throttle valve and a flow control valve are also installed in the pump body to ensure that the displacement of the booster pump is substantially stable.
The use and maintenance of the steering assist pump is particularly important, so the following must be done:
First, the correct choice of hydraulic oil is the key to ensure high efficiency and longevity of the booster pump;
2. Regularly check the oil level of the oil storage tank. The clean hydraulic oil should be replenished in time. The filter element in the oil storage tank should be cleaned with alcohol during maintenance;
3. If the steering pump booster leaks, impact or abnormal noise is found during use, it should be checked and eliminated in time;
4. After the vehicle has been running for a period of time, the hydraulic oil filter should be replaced in time, especially after the new pump is used, the hydraulic oil should be replaced after 2500-3000 km.
The oil change method is as follows: 1. Support the front axle to make the wheel off the ground; 2. Remove the oil storage tank cover, remove the oil return pipe and the steering gear oil drain plug; 3. Start the engine at high speed for about 10 minutes to save Oil tank, steering wheel booster pump, hydraulic oil in the steering machine; 4. The engine is turned off, turn the steering wheel to the extreme position left and right, and discharge all residual hydraulic oil; 5. Replace the filter element and add hydraulic oil to the specified height. The air of the net hydraulic system. 
Causes and troubleshooting methods of steering machine booster pump
2. There is deflation at the joint of the oil pipe and air enters;
3, the power pump parts wear, the gap is too large, resulting in oil weakness;
4, the oil does not meet the requirements or the use time is too long, the viscosity is too large, the blade sliding resistance is large;
5. The oil level in the oil storage tank is too low.
2. Check the fastening joints to prevent air from entering;
3. Check and repair the booster pump to replace worn parts.
Causes and troubleshooting of excessive noise during operation of steering gear booster pump
The cause of the malfunction: entering the air, the safety valve is damaged or the pressure is too high, and the oil absorption resistance is too large.
Remedy: 1. Check the fastening of the joint to prevent air from entering;
2. Repair the safety valve;
3. Replace the oil inlet pipe;
4. Dismantle the power pump. 
Directional machine power pump broken shaft failure
When steering, the steering wheel is killed in one direction, the retention time is too long, the steering oil pressure is too large, and the shaft is broken. The driver should pay attention not to hit the steering wheel to the end for a long time.
The oil level of the oil storage tank drops rapidly and the hydraulic oil leaks seriously.
The cause of the failure: 1. The connecting pipes of each part are damaged, the joints are not tight, and leakage;
2. The storage tank is damaged;
3. The oil seal of the steering machine is damaged;
4. The booster oil seal is damaged and the hydraulic oil flows into the engine oil sump.
Remedy: 1. Check each connecting pipe and joint;
2. Replace the oil storage tank;
3. Dismantle the steering machine to replace the oil seal;
