I guess I should add my 2150 also. Tried today to remove and change the hydraulic filter on the 1850 I purchased last year. I found an 1 5/8 socket to be too small (didn't go all the way on) and 1 3/4 to be very loose fitting. When I went to remove it, it wouldn't budge. Have this same issue with my 1950 and haven't gotten that one changed yet either. Does anyone have any ideas on how to break this loose with damaging it? I can put a large pipe wrench on the body and try to stand on both the pipe wrench and the 3/4 breaker bar but I really need the 1850 and don't want to create more work than needed. Does it make sense to heat the cast where it threads in? I guess the other question is whether this part is indestructible or not. I will be putting some anti-seize on the threads when it goes back together.