Gromit Posted April 7, 2008 Share Posted April 7, 2008 I was looking under the sister's '85 110 and I found a small valve in the brake line to the rear. It's called a G valve in the parts cat. What does it do? restricts rear brake pressure? Quote Link to comment Share on other sites More sharing options...
cipx2 Posted April 7, 2008 Share Posted April 7, 2008 Its name comes from the fact that it has a small mass inside that will act as a pressure limiter on the action of G forces. It was sort of a safety device to limit the pressure on the rear axle when breaking hard or going/breaking downhill. Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted April 7, 2008 Share Posted April 7, 2008 It's a shuttle valve. if the rear brake line springs a leak, a valve is supposed to pop over and "block" the oil from the rear section, leaving you with front brakes. vice~verca with the fronts. after posting all that rubbish ^^^^^, yeah, cipx2 is right... i was thinking about soemting else! Quote Link to comment Share on other sites More sharing options...
Gromit Posted April 7, 2008 Author Share Posted April 7, 2008 Its name comes from the fact that it has a small mass inside that will act as a pressure limiter on the action of G forces.It was sort of a safety device to limit the pressure on the rear axle when breaking hard or going/breaking downhill. Cool, thanks for the info cipx. Who would have thought that LR and G-forces would be mentioned in the same sentence My '91 (with rear drums) doesn't have one fitted for some reason. (I assume then, that it might help those that change from drums to disks at the rear, stopping the rear locking up as much under heavy braking.) Quote Link to comment Share on other sites More sharing options...
cipx2 Posted April 7, 2008 Share Posted April 7, 2008 AFAIR it was a Series 3 "thing". Not sure if they were fitted to early LR 90s or 110s. You can check the parts manual though. Quote Link to comment Share on other sites More sharing options...
western Posted April 7, 2008 Share Posted April 7, 2008 90/110's 1991 onwards had the brake system components rationlised across the range, all 90's had the valve & 110 passenger carrying vehicles dependent on local market regs had the G valve fitted. Quote Link to comment Share on other sites More sharing options...
stageonesimmo Posted April 7, 2008 Share Posted April 7, 2008 And Mil spec 90's to be able to cope with the big difference between empty and fully loaded with a trailer - the G valve would cut in unladen and keep the pressures low at the back but allow harder braking when loaded up, or some such sciencey stuff........ Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted April 7, 2008 Share Posted April 7, 2008 I thought it was the valve that operated the G spot ..... OK, I'm gone >>>>>>>>>>>>>>>>>>> Mo Quote Link to comment Share on other sites More sharing options...
ThreeSheds Posted April 7, 2008 Share Posted April 7, 2008 I thought it was the valve that operated the G spot ..... OK, I'm gone >>>>>>>>>>>>>>>>>>> Mo Nah... It wouldn't be that easy to find... Quote Link to comment Share on other sites More sharing options...
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