WesBrooks Posted February 1, 2016 Share Posted February 1, 2016 Can anyone point me to a good description of what this valve is? I think it is dropping the brake pressure to the rear wheels to balance the braking. Is this s straight proportional drop? If I move it do I need to keep the orientation of the unit the same? Thanks, Wes. Quote Link to comment Share on other sites More sharing options...
western Posted February 1, 2016 Share Posted February 1, 2016 if it looks like this http://www.brit-car.co.uk/product.php/82095/5497/brake_valve_disco_ma_ the job is to prevent rear brakes locking up before front brakes when lightly loaded. it's meant to fit between servo & rear brakes only a block diagram but you should get the general idea http://lrcat.com/#32/4/45432 Quote Link to comment Share on other sites More sharing options...
Boydie Posted February 2, 2016 Share Posted February 2, 2016 As Western said , it prevents rear brake lock up by limiting the hydraulic pressure to the rear brakes - hydraulics having a nasty habit of the fluid going to the furthest pint in the system first and building up pressure from the rear to the front. You can remove it and replace it with an adjustable unit, as I have on my Disco, so that you can "dial" up the amount of rear braking you want but otherwise if its not working, replace it, don't try to adjust it yourself as this is done on a rig and the adjustment then sealed. In regard to the adjustable brake limiting valve, on flat fast dirt roads I like the rears to come "on" before the front to cause the rear to slide out and assist in fast "turn-in" into corners, on bitumen this would be possibly fatal. Quote Link to comment Share on other sites More sharing options...
WesBrooks Posted February 2, 2016 Author Share Posted February 2, 2016 That's the part. Any one got any idea if this is dynamic or fixed proportioning of the pressure and is orientation critical? I've got to remake my brake lines due to heavy corrosion and the inner wings maybe completely different to stock. I'd like to not have to worry about keeping the orientation the same. However, if it lowers back brake pressure more as the truck pitches forward under braking then I'll need to keep the orientation fixed. Quote Link to comment Share on other sites More sharing options...
Pawl12 Posted February 3, 2016 Share Posted February 3, 2016 Don't worry it's performance is fixed (vis the internal spring & piston diameters). The only thing to be semi careful about if in different orientation is bleeding it. Outlet ports should be upwards to help Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.