...check the bolts on your rear end. Yesterday was a bad day for me. I finally got the wheel weights on the 1855 and was starting to get some work done, when the tractor started making a funny noise, smoke began rolling out from under the seat pan, and I saw sparks shooting out around me. I shut it down, lifted the seat, and this is what I saw:
The entire rear end assembly started to come out from under the tractor. It snapped part of the cast aluminum case assembly, and cracked a hydraulic line. There are 3 bolts on each side that hold the rear end to the tractor...2 bolts down low and 1 up top. Upon inspection, it looks like one of the rear bolts and fallen out, and the other worked loose. This allowed enough play in things that it snapped cast housing around the remaining top bolt. You can kindof see the bolts in these pics:
I've never heard of this happening before, and fluke things often happen to me that never happen to anyone else. BUT, it's worth the 5 minutes it will take for you to get a wrench and tighten these 6 bolts before you start your tractor again! This tractor only has 673 hours on it, and was primarily used for snow blowing. Now, get off your computer and go grab a wrench!