had my brakes go hard in the pedal and the engine run rough yesterday?? It was what I though..a split in my PBR VH 40 brake booster's diaphragm.
With some help from Spaceace and a mechanic mate (Gaz at Kings Point Automotive) I was able to get an new diaphragm sent..(unfortunately it won't arrive here until Monday

once I found the split (luckily around the outer rim of the diaphragm) I cleaned the split and glued it together with super glue. then put the whole lot back together..and it works!
Now remember this is only a temporary fix until I get the new one on Monday.. but it should get everyone else out of a roadside brakedown... (Pun intended).
Scotty.