Master Cylinder

Post by **PaulB** » Wed Feb 02, 2005 3:09 pm

Any one else been having problems with new master cylinders? Just had number 2 go wrong. Basically after servere bleeding session when re-fiited, pressure just goes. Cannot bleed anymore as pedal just flops to the floor! Very frustaring after a 1 hour or so bleeding, brakes almost there, bleed once more with fresh fluid and **** no brakes! So number 3 has been supplied.....so before another week-end of fun....any ideas?
Cheers PaulB

Post by **uclarge** » Wed Feb 02, 2005 3:45 pm

after bleeding one cylinder did you check that the fluid was above (nearly overflowing) so air could not be drawn into thge system!? this was a problem i faced many times.. and yes its bloody iirratatii#ng! you do know that you start with the wheel furthest away right? then work up to the drivers side? well i hope ive been of help if not sorry! charly

Post by **PaulB** » Wed Feb 02, 2005 3:56 pm

Thanks Charly for advice, duly followed proper bleeding order. I have a remote bulkhead brake reservoir to avoid running out of fluid. Normally have brother under car bleeding brakes, me pumping the pedal and my son keeping an eye on the fluid level, topping up when getting low. Saturday is removale/re-placement and bleed again......

Post by **Kevin** » Wed Feb 02, 2005 4:13 pm

Thats got to be unusual its quite rere for a new master cylinder to be faulty, any ideas what has been going wrong ?

Post by **PaulB** » Wed Feb 02, 2005 4:20 pm

Going to take to bits when I get the little racal out this week-end and investigate further. I agree, unuasual for this type of master cylinder problem. 1 going wrong unlucky but 2....just wondered if manufacturer cheap skating somewhere on materials?
Cheers PaulB

Post by **rayofleamington** » Wed Feb 02, 2005 9:40 pm

s quite rere for a new master cylinder to be faulty

is it the 'not very original' Lockheed logo'd master cylinder you've been using or the 'doesn't even pretend to be original' pattern ones? (I got a strong hint from someone to avoid the pattern M/Cs in case of trouble)

Post by **PaulB** » Thu Feb 03, 2005 10:23 am

Hi Ray, it is the "not very original" lockheed logo'd master cylinder. I also was advised to stay away from pattern M/C's. Cheers PaulB

Post by **Willie** » Thu Feb 03, 2005 9:24 pm

PAULB.... only thing I can suggest is that you have a batch of
M/Cs with the wrong size rubbers!! Early ones had a 7/8" bore
later ones were 13/16" bore (marked on the M/C body) for the
1098 cars. Were all these units from the same supplier,and who
was it?? Of course this could only be a problem if you had ordered
the early 7/8" type?