1. Due to the difficulty of controlling fluid flow resistance and leakage problems, low efficiency, in severe cases, may pollute the environment.
2. It is susceptible to temperature changes during operation and therefore does not work properly under very high or low temperature conditions.
3. hydraulic accessories manufacturing accuracy requirements are very high, so the price is more expensive.
4. Due to the leakage and compression of the liquid medium, it is not possible to obtain a strict transmission ratio.
5. When the hydraulic drive fails, it is not easy to find the cause of the fault;