90 rear disc pressure valve?

devomorris · Sep 11, 2012

Hi guys, need some expert advise! Have strapped a disco 1 rear axle on my '84 model 90. The pressure sensing valve is the original G one apparently for the drum brakes. Can I use the disco valve instead? This would mean I'd have to run primary circuit for rear and left front and secondary for the right front. Is this how 300 discos/def are plumbed? And is it a good idea to plumb this way. Cheers

MrPDude · Sep 11, 2012

I have put a disco rear axle in my 84 ninety. Using the standard pressure regulator thing and it works fine.

If you do put the disco one in, put the disco servo and master cylinder in too.. Then you have independent front left and right. And a separate line for the rear

devomorris · Sep 11, 2012

Thanks mr pdude, from what I can gather most just leave it as is. Used the disco master and booster on my classic which had Toyota brakes on it. Thinking of putting those now on the 90 as it now has a 3.9 v8 auto and some descent brakes would be welcome. Thanks again.

MrPDude · Sep 15, 2012

Disco discs at the rear with a disco master cylinder will sort you great stuff

tacr2man · Sep 15, 2012

I used the entire braking system (inc limiter valve ) when I fitted my 300tdi auto into 90 as i was using disco axles as well . (Not including pipe work

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saxokid18 · Sep 16, 2012

it works the same i used a disco axle on my standard servo and its all ok never failed a test and brakes work well

90 rear disc pressure valve?

devomorris

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