I understand this part.........
1. tee off from crankcase,one end to catch tank,one to the pipe that goes down,and last pipe to the catch tank.
2. pipe from other port on catch tank straight into accumulator valve that sits on top of the TIP
but where is this brake pipe that needs blanking off
After looking closer at Jase's pic, is the BRAKE PIPE that you mention needs blocking off,the one that comes out the side of the inlet mani and goes to a y'shaped joint(has got the hex bolt in it in the picture) what do you do with the rest of that pipework if you've blocked it off (obviously remove it )but up to which point and does that end requires blanking off also