T-Mack1 Posted Thursday at 02:27 AM Share Posted Thursday at 02:27 AM I have a question for those that know. On our 1957 fire truck with air brakes (B85F-1211), the treadle valve supply line is a flexible hose but all the other lines on the treadle are copper pipe. The question I have is, should that supply line be a flexible hose, or a copper pipe? If you have a 50's era truck, what's on yours The reason I ask ...... when we took the fuel tank out to get repaired, I figured I would take the mounting brackets (J-Brackets) off and clean and paint them and the frame rails. Well, to get to the bolts I had to push the flex hose a bunch and it now has a leak. Quote Link to comment https://www.bigmacktrucks.com/topic/75654-question-on-1957-air-brake-treadle-valve-supply-line/ Share on other sites More sharing options...
mechohaulic Posted yesterday at 12:46 AM Share Posted yesterday at 12:46 AM 1-flex is there; will be easier to replace with same, 2- the flex braided (? doubt ) or rubber flex ; basically a hyd line (#8)? remember treadle having a rubber (hyd) line ; don't recall which position. 3- won't be seen or change originality. Quote Link to comment https://www.bigmacktrucks.com/topic/75654-question-on-1957-air-brake-treadle-valve-supply-line/#findComment-577401 Share on other sites More sharing options...
mechohaulic Posted yesterday at 12:50 AM Share Posted yesterday at 12:50 AM could also be an aeroquipt clothe/ internal braid inside rubber lining having replaceable ends. leaking from movement -- dry rotted ? Quote Link to comment https://www.bigmacktrucks.com/topic/75654-question-on-1957-air-brake-treadle-valve-supply-line/#findComment-577402 Share on other sites More sharing options...
T-Mack1 Posted yesterday at 11:31 AM Author Share Posted yesterday at 11:31 AM 10 hours ago, mechohaulic said: could also be an aeroquipt clothe/ internal braid inside rubber lining having replaceable ends. leaking from movement -- dry rotted ? Flex line is cloth outer, then steel braid and I assume rubber inside. The cloth is falling off. Areoquip...... I did a year in "Valve Groom" at the Macungie plant, which is next to the Areoquip guys. Quote Link to comment https://www.bigmacktrucks.com/topic/75654-question-on-1957-air-brake-treadle-valve-supply-line/#findComment-577407 Share on other sites More sharing options...
h67st Posted 20 hours ago Share Posted 20 hours ago Aeroquip hose is tough, but the steel braid rusts and the rubber gets rotten. I used nylon on my entire truck (except for the air compressor line). It's not original but it's cheaper than Aeroquip or copper and much easier to work with (cuts with a utility knife). It's been standard on all truck air brakes for over 40 years. Quote Link to comment https://www.bigmacktrucks.com/topic/75654-question-on-1957-air-brake-treadle-valve-supply-line/#findComment-577412 Share on other sites More sharing options...
Jack Mack Posted 18 hours ago Share Posted 18 hours ago Thanks my brother and I are considering it instead of copper ,as we are not restoring to original , hell the ladder of our hook and ladder had been scrapped so we just have a 1957, red convertible with a five speed! What’s not to love about that! Tomorrow will be the first time in my life that I will be at Macungie truck show looking for vintage parts for our truck!…..Jack😎 Quote Link to comment https://www.bigmacktrucks.com/topic/75654-question-on-1957-air-brake-treadle-valve-supply-line/#findComment-577414 Share on other sites More sharing options...
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