Matching skills
1. Check whether the product provides 2-3 inch elevation requirements. Some products only provide 2 inches elevation. After barely using 3 inches elevation, it is easy to pull to the limit in off-road and cause damage.
Second, whether the diameter of the central telescopic rod of the shock absorber can reach more than 16 mm, which is a basic indicator of strength.
Third, whether the upper and lower connecting sleeves of the shock absorber are high-strength polyurethane sleeves, which is also an important basis for ensuring long-term high-strength use, because ordinary rubber is difficult to use for a long time under high strength.
The shock absorber is mainly used to suppress the shock and the impact from the road surface when the spring rebounds after absorbing the shock. When passing on uneven roads, although the shock-absorbing spring can filter the vibration of the road, the spring itself will reciprocate, and the shock absorber is used to suppress the jump of this spring. If the shock absorber is too soft, the body will jump up and down. If the shock absorber is too hard, it will bring too much resistance and prevent the spring from working properly. Shi Xiaohui said that in the process of modifying the suspension system, the hard shock absorber should be matched with the hard spring, and the hardness of the spring is closely related to the weight of the car, so heavier cars generally use harder shock absorbers. It is necessary to constantly try during the modification to design the best combination of shock absorber and spring. Professional modification shops can generally find the best match for the car owner.
Oil leak failure
If an automobile shock absorber leaks oil, it is undoubtedly a very dangerous thing for the shock absorber. Then, once an oil leak is discovered, timely remedial measures must be taken. The key inspection items are oil seal gaskets, sealing gaskets rupture and damage, and oil storage cylinder heads. Check whether these parts have loose nuts.
If oil leakage is found, first tighten the cylinder head nut. If the shock absorber still leaks, the oil seal and gasket may be damaged and invalid, and new seals should be replaced. If the oil leakage still cannot be eliminated, pull out the damping rod. If you feel a pinch or change in weight, check whether the gap between the piston and the cylinder is too large, whether the piston connecting rod of the shock absorber is bent, and the piston connecting rod Whether there are scratches or pull marks on the surface and cylinder.
If the shock absorber does not leak oil, check the shock absorber connecting pin, connecting rod, connecting hole, rubber bushing, etc. for damage, desoldering, cracking or falling off. If the above inspection is normal, the shock absorber should be further disassembled to check whether the matching gap between the piston and the cylinder is too large, whether the cylinder is strained, whether the valve is well sealed, whether the valve clack and the valve seat are tightly attached, and whether the extension spring of the vibrator is too soft or broken, it should be repaired by grinding or replacing parts according to the situation.
In addition, the shock absorber may have noise failure in actual use. This is mainly due to the shock If it is caused by insufficient or other reasons, the cause shall be found out and repaired.
After the shock absorber is inspected and repaired, the performance test should be carried out on a special test bench. When the resistance frequency is 100±1mm, the resistance of the extension stroke and compression stroke should meet the requirements. The maximum resistance of the stretch stroke is 392~588N; the maximum resistance of Dongfeng Motor’s extension stroke is 2450~3038N, and the maximum resistance of compression stroke is 490~686N. If there is no test condition, we can also adopt an empirical method, that is, use an iron rod to penetrate the lower end of the shock absorber ring, step on the two ends of the shock absorber, and hold the upper ring with both hands and pull it back and forth 2~4 times. When pulling upwards, the resistance is great, and when pressing downwards, it does not feel laborious, and the resistance of stretching is restored compared with that before repair, and there is no sense of empty travel, which indicates that the shock absorber is basically normal.
The components of shock absorber is very important , especially the oil seal brand , Max Auto use NOK brand oil seal , piston rod is chrome plating , to ensure it enough to protect it from rust .
Sintered are high precision to ensure the damping force stable .
Warranty : for all the shock absorber , coilover sold by Max Auto , if there is any leak oil problem within 1 year , we will provide the replacement shock body for free .
There is one customer who made compare test with Max Auto brand and Taiwan brand , the result shows the quality of Max Auto quality is better .
Post time: Nov-11-2021