I purchased my first unit about 4 weeks ago and used it to clean up a small amount of nuts/bolts making sure not to exceed the weight limit. After running about 4 hrs the unit simply quit working. Eastwood return policy was great and I got another unit last week. I went to try this unit last weekend and the same thing happened !! it burned up in about 4 hours. I am stumped now and have a call into technical service at Eastwood to see if they have had a bunch of returns?