Repair of electric vehicle shock absorber faults

Poor return of shock absorber
1. Check if the size of the front shock absorber and wheel system is suitable. If the front fork of the electric vehicle is too large, adding corresponding size shims can solve the problem; If the opening size of the electric vehicle front fork is too small, correct the corresponding size. Improper opening size of the front fork of an electric vehicle can easily cause early wear and oil leakage of the oil seal, and even lead to the possibility of front reducer fracture.
2. Check the dimensions of the upper and lower axle pins for the rear shock absorber, and check if the upper and lower dimensions are in an "eight" shape. Severe installation in an "eight" shape can easily cause early wear and oil leakage of the oil seal, and even cause the shock absorber to break.
3. It is normal for the front shock absorber to not fully retract around 20-40mm when the relevant assembly dimensions meet the requirements, which is caused by the weight of the vehicle body.
Abnormal vibration of the shock absorber
1. Firstly, check if there are any abnormal noises from other parts of the electric vehicle. At present, it is incorrect for some users to classify the oil return sound of the shock absorber as abnormal noise. As an oil type shock absorber, there must be a return oil sound.
2. The metal tapping sound caused by excessive valve clearance in the front reducer should be judged as abnormal noise.
The softness and hardness of shock absorbers
1. The front shock absorber of electric vehicles is soft, and in some areas, adding shock absorber oil is used as a temporary solution for after-sales service. This method is not advisable, as it can cause excessive internal pressure, affect the normal use of oil seals, and cause early oil leakage.
2. The rear shock absorber of an electric vehicle has a soft response, and the gear position of the rear shock absorber can be adjusted to increase the pre pressure value of the spring, but both sides must be consistent. Otherwise, it will affect the balance of the entire vehicle and have an impact on cycling.
3. The rear shock absorber reflects hardness. Firstly, check whether the assembly dimensions of the upper and lower shaft pins are in an "eight" shape, or whether the installation ears at both ends of the rear reducer interfere with the frame. Then, eliminate and solve the problem, otherwise it may cause the shock absorber to break.
Determination of oil leakage in shock absorbers
After parking, manually press the shock absorber 3-5 times to observe. The oil flows downwards on the front fork pipe or rear reduction connecting rod, and the front reduction lever opens the dust cover. If there is oil on the end face of the oil seal, it is determined that there is oil leakage. The oil seal can be replaced to solve the problem. Here, the maigo editor reminds everyone to pay attention to the installation direction and precautions of the oil seal; Replace the shock absorber after the rear reduction.

Shock absorption deformation and bending
The deformation and bending of hydraulic shock absorbers are mostly caused by human factors, such as impacts and significant bumps during cycling, which can lead to improper bending of the shock absorbers, even oil leakage. If not repaired in a timely manner, the handlebars of the vehicle may be misaligned, making it difficult to move to one side while cycling. In severe cases, it is easy to break the frame and cause accidents during cycling.
Repair method: Replace the hydraulic shock absorber. During installation, the screws that clamp the hydraulic shock absorber up and down must be securely fixed to prevent any movement.
Shock absorption offset and wear
Rusting on a single shock absorber results in a loss of shock absorption effect, causing one to decrease while the other does not, seriously affecting the shock absorption effect, causing uneven force on the shock absorption, causing the wheel to deviate from the center, and even grinding the tire, mud, and tiles to damage the bearings.
Repair method: Add or remove shims appropriately at the front wheel, making it more likely that both sides are consistent. Adjust the length of the shock absorber, and for safety reasons, it is recommended to replace the entire set of hydraulic shock absorbers!
Shock absorber oil leakage
The shock-absorbing inner and outer pipes are sealed with shock-absorbing oil seals. When the shock-absorbing pressure is lowered and bounced back and forth for buffering and pressure reduction, and when the oil seal ages and loses its elasticity, it will lose its shock-absorbing effect!
Repair method: Remove the shock-absorbing oil seal and replace it with a high-quality shock-absorbing oil seal. Clean the hydraulic oil inside the shock absorber and add appropriate hydraulic oil. If there is a gap between the oil seal and the shock absorber and the sealing is not tight, please replace the hydraulic shock absorber.
Short shock absorption and rebound stroke
Some electric vehicle users install a "driver's building" in front of them in order to avoid getting wet or sunbathing. The weight of the driver's building is "ballast", and sometimes there is one person in front, and the weight of two people plus the weight of the "driver's building" makes it difficult to absorb shock and rebound. When encountering bumpy roads, it is even more "frost on the snow", and the shock absorption gradually reduces their instinct. The rebound distance is getting smaller, and it is becoming more difficult to load and rebound, ultimately leading to "inability to move".
Repair method: It is recommended that users remove the "driver's building", regularly check the shock absorption travel, and replace it in a timely manner if it loses performance!
Hydraulic oil viscosity, damping damage
When the hydraulic oil is hit for a long time, the viscosity of the hydraulic oil increases, the oil hole is blocked by "viscous substances", the damping is damaged, and the shock absorption effect is greatly reduced.
Repair method: Check the amount and quality of oil in the shock absorber. If the viscosity is high and the oil deteriorates and becomes cloudy, please replace the shock absorber hydraulic oil to prevent a significant decrease in performance!