How to Replace the Oil Seal of 50d Cylinder of Longgong Loader

First of all, you have to buy an oil seal suitable for Longgong 850D. This cylinder is made of dragon fluid and comes standard with Hercules oil seal. The price is more expensive. First remove the boom cylinder to clean the oil, and be careful in the process of oil discharge to prevent the phenomenon of swinging arm. Remove the snap ring at the top of the cylinder, and then take out the piston rod. When it comes out, the oil seal seat will block it, and hit it with a hammer. Unscrew the big nut at the top. Remove the oil seal seat. In general, the outer ring should not be replaced. The main cause of oil leakage is oil leakage from internal oil seal. Take out the inner oil seal and replace it, and install it in the previous order.