Hey guys, first of all thanks for the past advice it has been very helpful. After getting the head off of my 175 I noticed the intake manifold was full of dirt. The valves were toast too. So in trying to find out what is going on I look at the air cleaner assembly and it seems like the filter is way too loose to do any king of cleaning. Looking at the Agco parts book it seems like I am missing a locking bar to hold it in. My tractor is serial # 9A56866 so I don't think I am supposed to have an inner filter. Does the locking bar twist in or is there supposed to be a threaded rod or something else holding this thing in? Thanks for any help!