The role of the rear hem arm of the car.
The function of the rear hem arm is to support the body and shock absorber. And buffer the vibration during driving. The shock absorber can play a very good auxiliary role in the lower suspension. Its tacit cooperation with the shock absorber and the spring can constitute a complete suspension system.
The role of the car hem arm:
1, the lower arm is commonly known as the lower suspension. Its main function is to support the body, shock absorber and buffer the vibration in the driving, shock absorber can play a very good auxiliary role on the lower suspension;
2, the tacit cooperation of the shock absorber and the spring can form a set of excellent suspension system, the rubber sleeve of the lower swing arm is broken to change the rubber sleeve, the ball head of the lower swing arm is broken to change the swing arm, and the life of the swing arm is about 8w-25w kilometers under normal driving.
3, suspension guidance and support, its deformation affects wheel positioning, reduce driving stability, if there is a problem with the front swing arm, the feeling is that the steering wheel will shake, and hands loose the steering wheel is easy to run off, and high speed when difficult to master the direction.
Its main function is to support the driving vibration of the body, shock absorber and buffer, the shock absorber can play a very good auxiliary role on the lower suspension, and its tacit cooperation with the shock absorber and the spring, thus forming a set of excellent suspension system.
The lower swing arm is the guide and support of the suspension, and its deformation affects the wheel positioning and reduces the driving stability.
Check :
Check the hem arm for deformation, cracks or wear or damage to the rubber bushing. These inspections can be performed visually or using professional tools to ensure the structural integrity and proper functioning of the hem arm .
Check whether the clearance of the ball head in the ball joint is increased, which is an important indicator to judge whether the swing arm is damaged. If the clearance increases, the lower swing arm may be damaged and needs to be repaired .
Check the chassis suspension for looseness and for abnormal noise. Damage to the lower swing arm may cause the chassis suspension to loosen and may be accompanied by abnormal sound .
Check whether the maneuverability deteriorates, such as the stability of the car at high speed, the inability to keep straight, etc., which may be caused by damage to the hem arm .
Check whether the positioning parameters are correct. If the positioning parameters are incorrect, the lower swing arm may be damaged, and need to be repaired .
Check whether the steering is affected. Damage to the lower swing arm may cause problems such as steering difficulties or failure .
What are the steps to replace the car hem arm?
Car hem arm replacement steps
Automotive hem arm is an important part of automotive suspension system, its main role is to support the body and maintain the stability of the vehicle. When there is a problem with the lower arm of the car, it needs to be replaced in time to ensure the safety and comfort of the vehicle. The following are the specific steps for the replacement of the lower arm of the car:
Step 1: Remove the screws from the swing arm and front shaft welded parts. This screw can be disassembled jointly with 18 socket and wrench, and there is no shelter around it, which is more convenient to disassemble. Remove the fixing screws of the support rod. There are two screws here that are connected with the lower swing arm. Remove the two screws.
2, remove the steering knuckle fixing screw, this screw compared to the first two some difficulty, you can use 16 wrench with 16 sleeve, remove the screw and screw. Remove the lower swing arm, after all the screws are removed, you can use a hammer to knock the lower swing arm, pay attention to safety when striking;
Step 3: Install new swing arm and steering knuckle connection screws. The process of installation is relatively simple, just reverse the process of dismantling, and then tighten the screw according to the specified torque, and hammer the swing arm upward when installing the screw, only until the fixed bolt can pass smoothly. Install the support rod setting screws. After connecting the swing arm with the support rod, tighten the two screws;
4. Install the fixing screws of the welded parts. As long as the hole is right, the bolt goes through smoothly, install the nut and tighten it. In summary, after replacing the swing arm, it is best to make a four-wheel positioning of the car to prevent the direction of the car.
Through the above steps, you can easily complete the replacement of the lower arm of the car. If you are not familiar with the car suspension system, it is recommended to operate under the guidance of a professional technician to ensure the safety and accuracy of the operation.
Suspension swing arm overhaul mainly includes inspection, replacement and maintenance steps, aimed at ensuring the safety of the vehicle and driving stability.
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