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Since it is a modified truck, obviously new brake lines and an old Master Cylinder, the answer is obvious. The truck modifier purchased standard-length brake lines, and used the loops to take up excess length, rather than cut off the flared ends and re-flare them. How do I know this? I've done it myself.


With trucks whether they are tandem trailer (A or B trains depending on the size of trailers) or not have air brakes. Sometimes they develop leaks in the air lines. When the pressure drops below a certain value the trailer brakes lock up suddenly. I notice you didn't mention smoke from the front trailer. I suspect it was normal stop but the rear trailer had ...


They are often times referred to as service loops. Their purpose is to allow some flexibility in the event the master cylinder has to be replaced, or a fitting needs to be repaired. It makes it easier to align the fittings without crossthreading them. AS @Fred Wilson has stated there is flexing. The brakelines will typically be anchored to the frame. The ...


It is about vibration. The master cylinder and brake booster are mounted to the firewall; the firewall flexes. They move up and down significantly as the body jerks up and down when driven over bumps. This solution is cheaper to implement than changes to the firewall. It would be challenging to build a firewall rigid enough to support that weight.


More than likely a Bad ignition switch (lower steering column), replace it, sometimes it burns the big 12v wires at the switch and you have to repair the wire ends with new ones or get a ignition switch repair pigtail and splice it in.


Have you checked the battery condition? Your local motor parts supplier should be able to test it for you, and replace it if it's failed. As a guide, batteries usually last 5-8 years, so if it's in that range or older, you'll probably need to replace it. Also check the condition of the connections to the battery terminals, and the condition of the ...


The 3.7 is notorious for having a rocker arm fall off and or lifters collapsing. This is usually accompanied by a check engine light being illuminated. Use a stethoscope or a long screw driver and try to isolate where the knock is coming from. If it's coming from a valve cover, remove the valve cover and you're likely to find a rocker laying around. If ...


If you take the length of the semi trailer from rear axle to towing pivot, that's technically your minimum turning radius. A driver who can get his tractor unit 90degrees to his trailer could make the turn. But it would be hard on the surface and his equipment. Why not design a straight through layout? Truckers hate tight maneuvers in big rigs.


This is not a very easy topic. You are going to want to figure this stuff out for yourself and then do some testing to verify your design assumptions work the way you think they will. For the max steering angle you should be able to get that from different tractor manufacturers. Frankly if it were me, I'd be grabbing a tape measure, a set of old skool ...

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