Greetings my 85TD recently developed a glitch, refusal of band B2 to apply on accel. from dead stop. [eng flareup with slightest press on fuel feed pedal]thru armchair diagnosis re: puter info.Preliminaries have been performed filter & fluid changed 10k miles ago on purchase of veh. has only 178k . whatI would like is a fluid circuit diagram to have a greater understanding& picture ref PRIOR to valve body disasembly!!related info & referals greatly appreciated regards butch

 

Butch,

Forget the diagram. Just replace the B2 piston. It's almost certainly broken in half. I had the same problem on my own car.