rtbarton Posted March 12, 2006 Share Posted March 12, 2006 I bought this on eBay a while back http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...AMEWN%3AIT&rd=1 If you look on the left hand side there is a device with two black wires coming out of it screwed into the receiver. There is zero ohms resistance across these wires, and I've had it up to 130 psi and it stays zero all the time. Also just behind this is another device screwed into the receiver with a single 1/4 in. male spade connector on it. This stayed open circuit. I am told this came off a lorry, (not the back of I hope!) Does anyone know what the electrical bits do? Thanks Quote Link to comment Share on other sites More sharing options...
western Posted March 12, 2006 Share Posted March 12, 2006 Most likely the low air pressure warning for the air pressure gauge/warning lights/buzzer in the cab Quote Link to comment Share on other sites More sharing options...
rtbarton Posted March 12, 2006 Author Share Posted March 12, 2006 Most likely the low air pressure warning for the air pressure gauge/warning lights/buzzer in the cab I was thinking on those lines, but there was no variation of resistance with pressure, or switching action. Maybe I didn't get upto high enough pressure? maybe a pressure transducer requires a voltage applying to it? Quote Link to comment Share on other sites More sharing options...
Turbocharger Posted March 12, 2006 Share Posted March 12, 2006 If it helps, bus air systems run around 8bar, 110psi ish. Quote Link to comment Share on other sites More sharing options...
MogLite Posted March 12, 2006 Share Posted March 12, 2006 I am told this came off a lorry, (not the back of I hope!) I can't see why a truck tank would need so many ports !! If it was a truck tank, could one be a moisture warning, and they need draining down. Quote Link to comment Share on other sites More sharing options...
rtbarton Posted March 12, 2006 Author Share Posted March 12, 2006 I can't see why a truck tank would need so many ports !!If it was a truck tank, could one be a moisture warning, and they need draining down. I've just plumbed it in today and it looks more like a WWII naval mine. I've provided a drain tap, one of the ports points vertically downwards when it is bolted to the wall and another sits on the front which I have designated as an inspection port. All the threads are either 1/2 or 3/4 BSP, the unions shown in the pic were bloody tight, but heating them with a blowlamp freed them off, they were sealed with some jointing compound or other. Quote Link to comment Share on other sites More sharing options...
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