Vladislav Posted November 7, 2019 Share Posted November 7, 2019 Going to buy a new pair of such ones to put on my R-model. Went through flea-bay and found they differ about port locations and some marked as 4 pci crack pressure. Also I noted there's plenty of different (Bendix) part## which didn't have much in common. A question - what should I look for making the choice? My originals valves have tags gone. The truck is a long wheelbase R-model tractor unit which is most probably supposed to drive without a trailer and just for hobby reasons. The pics are what I removed from 31 y.o. chassis and they looked being installed there at the factory. Thanks in advance, Vlad Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/59735-bendix-r12-brake-relay-valve/ Share on other sites More sharing options...
KKERGALL Posted November 8, 2019 Share Posted November 8, 2019 P/N# 20QE458 / 20QE461 one is Bendix the other Midland. Will double check and let u know Fri. Rich Quote Link to comment https://www.bigmacktrucks.com/topic/59735-bendix-r12-brake-relay-valve/#findComment-435435 Share on other sites More sharing options...
Swishy Posted November 8, 2019 Share Posted November 8, 2019 (edited) Here U go Try this on for size https://www.bendix.com/media/documents/BW1114QuickReferenceCatalog.pdf https://www.haldex.com/globalassets/north-america/documents/valves/l00134.pdf http://www.sealcocvp.com/prod/quick/art/Sealco_QR_2011.pdf cya Edited November 8, 2019 by Swishy Quote Link to comment https://www.bigmacktrucks.com/topic/59735-bendix-r12-brake-relay-valve/#findComment-435444 Share on other sites More sharing options...
KKERGALL Posted November 8, 2019 Share Posted November 8, 2019 Have one each of valves Bendix / Haldex 20QE458 / 103009 20QE461 / KN30100AG @ $ 79.00 EA. USD Quote Link to comment https://www.bigmacktrucks.com/topic/59735-bendix-r12-brake-relay-valve/#findComment-435462 Share on other sites More sharing options...
Vladislav Posted November 8, 2019 Author Share Posted November 8, 2019 (edited) 4 hours ago, KKERGALL said: Have one each of valves Bendix / Haldex 20QE458 / 103009 20QE461 / KN30100AG @ $ 79.00 EA. USD Thanks for the info support and the offer. I will keep Bendix one in mind. Would like to go with two almost similar ones. And I have no less than a year to find them. Just slowly collect parts required for the project. Ok, a point to note - 20QE458 doesn't cross to 103009 (4pci crack) but to 065125 with 5,5 pci. Wonder how that difference in crack pressure is sufficient for brakes operation? Edited November 8, 2019 by Vladislav Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/59735-bendix-r12-brake-relay-valve/#findComment-435485 Share on other sites More sharing options...
Vladislav Posted November 8, 2019 Author Share Posted November 8, 2019 17 hours ago, Swishy said: Here U go Try this on for size https://www.bendix.com/media/documents/BW1114QuickReferenceCatalog.pdf https://www.haldex.com/globalassets/north-america/documents/valves/l00134.pdf http://www.sealcocvp.com/prod/quick/art/Sealco_QR_2011.pdf cya Swishy, mate, thanks for clearing me up. Now I'm not that blind in part ## jungles Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/59735-bendix-r12-brake-relay-valve/#findComment-435488 Share on other sites More sharing options...
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