Got a 19 year old 753. went to pull hydraulic motors. removed the side plates and it was packed with dirt. cleaned from outside and it looked pretty good. Then I removed the control panel and discovered my cleaning just started. About 3 hours later with a 3000 PSI washer its looking good. Almost need a wheelbarrow to haul off what I washed out. Found a nice screwdriver and a couple empty beer cans mixed in there. The funs just starting.