Grazer":3hvbxjr1 said:
...flexible lines are used in hydraulic surge brakes. I am wondering if those lines can be lengthened enough (inside or outside the frame) to allow the tongue to fold back without kinking?
I'm sure you're just itching for another reply from someone who really doesn't know :wink:, but, just thought I would mention that these lines only come in a few, pre-set lengths. What that means is that one has to choose the next size up, and then the excess is coiled up and secured to the trailer frame (in my case, back on an inner frame piece near the axles) (unless maybe you get custom made lines). Now, the coil on my trailer doesn't move (as there is no reason for it to), but it is coiled in a fairly small diameter coil (say 12" or so). That makes me think that as long as attention was paid to fair leads, etc. that it is flexible enough (hopefully someone who actually knows will also respond).
There is a limit through: Where I ran into the problem (actually only one of many problems that I subsequently had to "re-repair :amgry) was where the trailer shop had run the flexible brake line off the solenoid (on top of the tongue frame piece) and in an immediate 90º bend (
very small radius), through a hole in the trailer frame, and then through the tongue and on back. At the time I picked up the trailer I questioned it and of course got the "Look, we know how to do our job, that's FINE" response. Well, it wasn't fine (ahem). So there is apparently a limit, but that was a very tight 90º bend, which I'm sure you would avoid.
Sunbeam
PS: Having read of the possible issues with surge brakes - especially in the mountains - I was pretty gung ho to have mine converted at that initial shop while I was having the trailer overhauled. I needed a new actuator anyway. However, they had never done EOH (flat country), and so I decided (luckily!) to forego it at that time, buy a new surge actuator, and make my first trailering trip that way (naturally, it was 3,500 miles and included numerous mountain ranges).
Well, I was sweating bullets about those big mountain passes - practically needed a chalk bag for the steering wheel - but it all went fine (and I've been over many more passes since then). I do have to be conscious of not using my brakes on a descent, especially near the top (because once applied, there is no "reason" for the trailer brakes to release and so they could drag and heat up), but I have not found that to be a big problem, as long as I am in no rush. I just downshift and let the tow vehicle keep our speed reasonable, and no braking is required (or at most just a veeeery gentle stab partway down). I've been able to keep the trailer brakes cool.
Now, would EOH be nicer? I bet they would. And if I were going over big passes weekly, I'd probably change. But as it stands now (and with my particular tow vehicle), the surge seem to work fine (rig practically brakes better when I'm towing than when not). At any rate, it's something I see as an optional upgrade (for me) not something I really need right now - with the 22.