Rickpile Posted April 3 Share Posted April 3 Hello. I have. 1980 Mack R model single axle dumptruck. I have a Wagner Lockheed AD 80152 valve with its exhaust plumbed hard piped to a QR 1, 2 ??? valve. These 2 valve work together this brass hard piped together. It is found inside the frame rail right behind the cab..drivers side. 1) What does this valve do? 2)What is it called? 3) Servicing this valve. 4) Any ideas? Trying to Re seal this I'm finding is near impossible. Square shouldered "O"rings and internal valve "O"rings I can not find right size anywhere. I can not find a rebuilt or new one either. Wagner Lockheed disbanded 40 years ago.. I have been told they no longer make such a two valve married together. Thx for any input you might have on this https://photos.app.goo.gl/MRaY6GgMY7tEevJD6 Quote Link to comment https://www.bigmacktrucks.com/topic/74020-mack-r-model-with-wagner-lockheed-80152-valve/ Share on other sites More sharing options...
fjh Posted April 5 Share Posted April 5 On 4/2/2024 at 7:10 PM, Rickpile said: Hello. I have. 1980 Mack R model single axle dumptruck. I have a Wagner Lockheed AD 80152 valve with its exhaust plumbed hard piped to a QR 1, 2 ??? valve. These 2 valve work together this brass hard piped together. It is found inside the frame rail right behind the cab..drivers side. 1) What does this valve do? 2)What is it called? 3) Servicing this valve. 4) Any ideas? Trying to Re seal this I'm finding is near impossible. Square shouldered "O"rings and internal valve "O"rings I can not find right size anywhere. I can not find a rebuilt or new one either. Wagner Lockheed disbanded 40 years ago.. I have been told they no longer make such a two valve married together. Thx for any input you might have on this https://photos.app.goo.gl/MRaY6GgMY7tEevJD6 It may be a front wheel limit valve Is there a limit switch on the dash? does it go to the front brakes? Quote Link to comment https://www.bigmacktrucks.com/topic/74020-mack-r-model-with-wagner-lockheed-80152-valve/#findComment-549422 Share on other sites More sharing options...
Hans Remmers Posted April 6 Share Posted April 6 16 hours ago, fjh said: It may be a front wheel limit valve Is there a limit switch on the dash? does it go to the front brakes? It does appear to be a front axle limiting valve. I found there is at least one 80150 valve available on eBay. Quote Link to comment https://www.bigmacktrucks.com/topic/74020-mack-r-model-with-wagner-lockheed-80152-valve/#findComment-549499 Share on other sites More sharing options...
Rickpile Posted April 17 Author Share Posted April 17 So it proportions air pressure to front brake cans so as to apply evenly? Quote Link to comment https://www.bigmacktrucks.com/topic/74020-mack-r-model-with-wagner-lockheed-80152-valve/#findComment-550051 Share on other sites More sharing options...
fjh Posted April 17 Share Posted April 17 10 hours ago, Rickpile said: So it proportions air pressure to front brake cans so as to apply evenly? It cuts the air pressure in half so the front brakes don't lock up enabling you to steer! The way I under stood it ! the auto one which yours likley is after XX amount of preasure gives all available air pressure! Quote Link to comment https://www.bigmacktrucks.com/topic/74020-mack-r-model-with-wagner-lockheed-80152-valve/#findComment-550059 Share on other sites More sharing options...
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