Okey dokey all sorted and usual you clever lot on here have saved my butt again! Stripped the valve down and it was full of horrid black gunk. Unfortunately the gasket was in a few pieces so cut a new one from thin gasket paper. With a smear of sealant it was back together. I left it overnight before refilling the brake fluid and it seems to be leak free...so far! So once again I’m in debt for the great advice and one step nearer to actually getting away soon so hats off to you clever lot!!
Ok this is embarassing. I've taken mine apart and can't remember how it goes back together! I've got an ali washer about the size of a penny and a rubber bit about the same size with a hole in the middle and I don't know where those two bits go. Anyone got an exploded diagram of how they go back together please?
Think ur on about the rubber band seal goes in the ridge and the washer I think goes on end of spring @pkrboo has some great pics Sent from my iPhone using Tapatalk
Thanks for the pic. Looks like the rubber bit is in on the left hand half over the shaft of the smaller slidey piston bit (no it's OK I knew where the o ring went). So does my washer go between the spring and the larger piston slidey bit that's under it, in your pic? Or does it go between the spring and the rubber in the opposite half? (Hope that makes sense) @pkrboo - Matt if you've got a diagram, please would you send it to me?
Does the cross section help? It looks like the washer goes between the spring and the secondary piston (the larger slidey bit)
Mine is the later type and looks a bit different to that one, I assume the principal is the same though. Thank you. Neither Bentley or Haynes were any help.
If you look at mine stripped down the washer goes between the spring and the smaller piston, or between 2 & 3 in @77 Westy diagram
I’ve never had one apart and I don’t really know what the spring does but doesn’t the washer give the spring something to push against? The shoulder is smaller on the secondary piston side compared to the primary piston. What does the washer do if it’s on the primary piston side?
Now I’ve had a look at @Skyelectrix pic I think he’s calling the secondary piston the smaller piston, even though it’s larger diameter. The cross section drawing is correct and we’re in agreement – probably.
I finally realised where this pesky rubber bit goes It looks like it'll fit in here It fits! It was nothing to do with the plungers after all - doh! It goes under the ball bearing
That’s the valve seal (#8 on the drawing); I thought you were talking about the washer between the pistons earlier.