I haven't logged-on in awhile but I'm looking for a blade cylinder for my old TB25 and started searching here. Dealer is of no help. The local hydraulics shop told me to find another one, because my tube is dented and rod damaged too. I'm having no luck finding a used one or parts. It must have been damaged when I bought the machine and it leaked a little but now it's leaking more than "just a little."
I overhauled the entire top with all Yanmar parts. The only Chinese part is the water pump. No Yanmar pump is available. It now starts easily with a new thermostart and that's how and why the previous owner broke all the rings (he used ether starting spray). I starts easily now and doesn't smoke.
Anyway...I re-read this thread and, if anyone still needs TB25 manuals (Yanmar and Tekeuchi parts, operator's, service, parts, etc.), I have them all in digital form. I think I sent them all to tool_king but Send me a PM, if you still need them.