T-Mack1 Posted yesterday at 02:27 AM Share Posted yesterday 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 9 hours ago Share Posted 9 hours ago 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 9 hours ago Share Posted 9 hours ago 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...
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