It also says changes fluid. It's pretty common to use a filter buggy on heavy equipment hyd system. Of course in some cases your talking about over 80 gallons of fluid so it is cheaper to use the filter buggy, change the filters a few times before you completly replace the fluid.
I don't agree that if it needs to be flushed it needs to be replaced. If their is something wrong and you think you can flush it to fix it then it's too late, but to just have it serviced is another thing.
I just had my allison trans fluid and filter change at the GMC place. $225 :shock: My trans does not have an internal serviceable filter. It's an external spin on.