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johnthesparky it’s a dual circuit with an extra feed to the rear at the centre axle, it’s always been like that in my ownership, if that makes any sense? Edit- hotfuzz I removed some pics because when I was trying to upload one of the rrc my wonderful phone decided to upload about 10 random unconnected ones!🙄
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Just got the ‘sorry, can’t help’ email from John Richards surplus 🙄
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Is it worth trying to find out what the Australian Perente 6 wheeler Landrovers use?
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Try ISOPARTS, they cross reference to these:
Associated Part Numbers
C05-220
2530998256389
998256389
99-825-6389
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I did have an ask around but no luck yet unfortunately
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Thanks everyone for your help, not getting far at the moment, all I keep getting is ‘what’s the vehicle military number?’ And so on, I did look at isoparts, they want me to create an account, still thinking about that at the moment Also just discovered that my ‘sound’ shell isn’t quite as good as I thought, so it’ll be getting attacked with the angry grinder and MIG for s bit, meaning the brakes aren’t the main issue 🙄
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Thanks, you got further with that than I could. I’ve requested a quote, let’s see what happens Cheers
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drseg
Part of things
Posts: 142
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whats the bore size and who made the cyl you have work that out and go up the size of the bore maybe 25%
alternatively contact jlr special vehicles division in Solihull as they made some 6 wheelers see if they can tell you what they used I'm guessing you may have a standard rrc master cyl on confirm this and get a bigger one there are formulas for working out what you need which are beyond me I'm afraid but think most of it is based on surface area of the pistons, so if you measure all the caliper pistons and what percentage one rear axle of pistons is expressed as an increase over one front and one rear axle and increase the bore by that percentage which may provide some idea of whats needed or just guess increase in bore is what you need
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Yeah thanks, I have had a look at the calculations, and like you say they’re pretty complicated, if I actually sat down with a pen and calculator I could probably work it out, but basically I just want more fluid movement capacity to cater for another pair of two pot callipers I’m doing it the lazy way at the moment trying to find out what others used!
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Do you know what diameter M/C it has now? If the pedal travel is too long/squashy then you'll be needing a bigger one...... Braided flexihoses, or even just fresher standard ones might also help.
Nick
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1967 Triumph Vitesse convertible (old friend) 1996 Audi A6 2.5 TDI Avant (still durability testing) 1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
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I can measure one, I’ve got another in bits somewhere. I was thinking that the hoses were almost new, but realised that I replaced them when I did the last engine swap- about 6 years ago! Might be going down the braided route then.. cheers vitesseefi
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May 10, 2020 18:21:31 GMT
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For those that aren’t now completely sick of rrc cylinders, my digital calipers reckon the cylinder is 23.6mm diameter, which according to google is 0.929 inches 🤔
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Phil H
Posted a lot
Posts: 1,448
Club RR Member Number: 133
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NATO parts numberPhil H
@philhoward
Club Retro Rides Member 133
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If you had said 23.8mm that sounds feasible as a 15/16” (odd ball size I know) but I still don’t know what the one for a 6 wheeler would be. You don’t normally get master cylinders over an inch bore?
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Last Edit: May 11, 2020 1:27:47 GMT by Phil H
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I wouldn’t be surprised if it’s an oddball size, waiting on a reply from isoparts so I’ll post when I hear Thanks again
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Should be possible to get 1”. If you’ve just got a bit of a long pedal, this might be enough. As above, greater than 1” is unusual in Europe.
Caliper condition, disc runout and wheel bear play can all have an influence too.
Nick
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1967 Triumph Vitesse convertible (old friend) 1996 Audi A6 2.5 TDI Avant (still durability testing) 1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
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Cheers, calipers were all rebuilt a few years ago with new seals and stainless piston, apart from the rearmost axle which had recon calipers. Front axle was replaced at the same time to gain vented discs, but calipers should be the same apart from spacing, although I suppose that would take slightly more fluid, again
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