The oil seal of excavator needs to be replaced frequently. If the replacement is carried out according to the conventional method, it will be affected by different environment and site. This article will summarize the shortcut to replace the boom oil seal. For reference only.
The boom cylinder oil is heavy, and the replacement of its oil seal can be completed in a short time if it is carried out in a qualified maintenance workshop. However, in the field, it is very difficult to operate by one person without lifting equipment. The summarized method only needs one chain block, four wire ropes with different lengths, and other relevant tools. The specific steps are as follows.
1) First, stop the excavator stably, put the stick to the bottom, lower the boom, and level the bucket to the ground.
2) Put the steel wire rope on the boom and the short steel wire rope on the upper end of the boom cylinder. Hook the two steel wire ropes with the iron hooks at both ends of the chain block, and then tighten the iron chain.
3) Pull out the pin on the piston rod head of the boom cylinder. Remove the oil inlet and outlet pipes and place the boom cylinder on the platform.
4) Remove the snap ring and key on the boom cylinder. Plug the rubber strip in the clamping groove, and cover the appropriate steel wire rope on the arm of the stick that is flush with the height of the boom cylinder and the pin hole of the piston rod of the boom cylinder. Connect with the chain block respectively, and then tighten the iron chain to pull out the piston rod.
5) Replace the oil seal, and then reassemble it in the reverse order of disassembly. If three people work together, it can be completed in about 10 minutes.
