Howdy.
I've just taken the brakes to bits on the viva - the calipers needed doing and a rear cylinder was out, so I thought, "what the hell - I'll do the whole lot" and thus broke the 'if it ain't broke, don't fix it' rule.
Anyway, all back together again and I can't get the brakes to bleed. I was having endless air pockets coming through at the front - pumping for ages, and nohting out the back at all (it's a tandem system). I even took the rear union off the cylinder and nothing came out. I have just taken it apart again and I can't see anything wrong with it. A bit puzzled becasue I took it apart and reasembled slowly and methodicly, going by the exploded diagram in the Haynes bible, replacing part for part, one at a time (new seals kit).
Who has got experience of taking apart viva HC lockheed master cylinders (and hopefully sucesssfully putting them back together again!)? the only things that I can see is on the diagram there is an extra O-ring under the base of the resevior rubber closest the servo. I couldn't get it to fit, and it made no sense anyway becasue it's just the one pipe from the cylider, and the resevior 'hollow top hat - type' rubber does an adequate job. the only other thing is the little lock pin that holds in the secondary piston. This drops in to the hole at the top of the cylinder whilst the resevior is off and the rubber bung/o-ring adapter is out. there are two holes that it could go in, but you can see the inside of the cylinder through both with the piston out - so they both go the same place? could this cause the symptoms described?
All the seals fit snuggly, and they are all the right way around. What's going on?
I've just taken the brakes to bits on the viva - the calipers needed doing and a rear cylinder was out, so I thought, "what the hell - I'll do the whole lot" and thus broke the 'if it ain't broke, don't fix it' rule.
Anyway, all back together again and I can't get the brakes to bleed. I was having endless air pockets coming through at the front - pumping for ages, and nohting out the back at all (it's a tandem system). I even took the rear union off the cylinder and nothing came out. I have just taken it apart again and I can't see anything wrong with it. A bit puzzled becasue I took it apart and reasembled slowly and methodicly, going by the exploded diagram in the Haynes bible, replacing part for part, one at a time (new seals kit).
Who has got experience of taking apart viva HC lockheed master cylinders (and hopefully sucesssfully putting them back together again!)? the only things that I can see is on the diagram there is an extra O-ring under the base of the resevior rubber closest the servo. I couldn't get it to fit, and it made no sense anyway becasue it's just the one pipe from the cylider, and the resevior 'hollow top hat - type' rubber does an adequate job. the only other thing is the little lock pin that holds in the secondary piston. This drops in to the hole at the top of the cylinder whilst the resevior is off and the rubber bung/o-ring adapter is out. there are two holes that it could go in, but you can see the inside of the cylinder through both with the piston out - so they both go the same place? could this cause the symptoms described?
All the seals fit snuggly, and they are all the right way around. What's going on?
