As a reference, this is a 20 year old Sears 3 ton. $100 dollars and free jack stands!
Extension block sold separately.
The frame length is about 24 3/4" and the
frame width is just shy of 7". Model # 375.5011??. Can't believe it's just a sticker and not stamped on. If you need cylinder dimensions let me know.
I've never did one thing to it in as far as maintenance goes and like most things I don't touch, it's worked well all these years.
A tension spring that holds the handle in the upright position broke (headbanger). A cursory look on Sears website (they do have an extensive parts section) and a visit to their local appliance/tool store has yielded no results. If you find repair/rebuild kits, I'd like to know.