Before installing the cardan shaft, check whether the lubricating grease of the cross assembly and the spline part is sufficient. If there is insufficient, add lubricating grease immediately.Although normally the regular lubrication time is 6 months, the lubrication condition is affected by many factors. Therefore, we suggest that the customer should often observe the use of cardan shaft during the use process, and regularly lubricate it to avoid the wear caused by lack of grease.The lubrication time of cardan shaft parts is not fixed, and the lubricating grease shall be supplemented in time according to the specific situation.