I'm just beginning to re-assemble mine and I haven't doen any pedals yet but it sounds like a hydraulic bleedout.
I bought this one and it's one of only 2 links I have. It has missing chapters
11 - Front aXLE DRIVE
12 - PTO shaft
13 - Service brake
14 - Parking brake
told the guy too, but I have no idea what he's done about it since. At he time he gave me a partial refund so I have no rocks to throw
The existing content is multilingual and is about 975 pages and a 125 mb file. Here's my screenshot taken when I ordered it.
Another very promising source was in war-torn Ukraine, but under the circumstances I didn't feel safe sending credit card info there. If he's o the level and able to deal, the man seems to have tons of manuals!
If anyone has dealt with him I'd like to know too.
The parts manual can help some times too. I don't have a link any more but google for a manual
"Deutz Fahr Tractor DX 4.10-DX 7.10 Parts Catalog.rar", I think I got it from a guy in Viet-Nam, fast and straight-forward online deal ending with a PDF download (about 280mb).