I was changing the oil seal on the rockshaft on my 1010RU, and when I pulled the seal, the hollow shaft came out along with it far enough for the bushing and gear inside the housing to fall down. I can move it back into position but it won't stay; consequently I can't get the hollow shaft back in. I have a feeling I'm going to have to disassemble the housing, and I'm wondering if there are any surprises awaiting me inside. Is it just a matter of removing the bolts and lifting the housing off? Any help is greatly appreciated. The manual does not go into any detail about what's inside the housing.