That's funny! I think the problem might be that instead of the frame being threaded (for the bolts) they tacked nuts on the inside. It's a box or a square tube that's only open on one end, not the backside, and there's no room to get a wrench in there. The bolts won't thread so I'm thinking the nuts fell off. This is what I'm trying to determine. Guess I wasn't as clear as I could have been initially.A wrench?
The bolts won't start to thread, I was wondering if, instead of threads in the frame they tack welded nuts on. The problem is that the brackets attach to square channel that's enclosed except for a small area on one side. I wanted to attach a picture from my manual which shows this but they wouldn't allow me to do so since I'm a new member. Anyway, I suspect that the nuts are now gone. If anyone else has had this problem I'd be interested to know how you remedied it. Six acres of rapidly growing grass await! ThanksI might try a stop nut or lock washer and/or blue Loctite.