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Old 01 May 2017, 09:16   #1
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Trailer pull rod that activates brakes advice

We would like to replace the pull rod that connects the trailer coupling to the cables that activate the drum brakes on our SBS trailer, with a cable . Possibly stainless. There is so much lost motion and its prone to bending and hence applying the brakes. Anyone any advice or experience . Ta Nik
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Old 01 May 2017, 11:54   #2
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I've fitted both threaded bar and cables on two or three trailers now.

I've settled for the M10 threaded bar option now. I use a single stainless steel eye bolt bolted into the the trailer chassis and this supports the thread bar.

Thread bar shouldn't bend as it should only be acting in tension.

I use zinc plated stuff from toolstation - they sell handy M10 joiner nuts too - make sure you use locknuts each side of each joiner nut

I spray the whole lot in Glaskelder Klar anti corrosion spray once installed.
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Old 01 May 2017, 11:55   #3
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Should have said I've found stainless cables are very stretchy even in thick sizes and I've had a couple of galv cables snap when externally they still seemed to be good condition
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Old 01 May 2017, 15:10   #4
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Quote:
Originally Posted by matata View Post
We would like to replace the pull rod that connects the trailer coupling to the cables that activate the drum brakes on our SBS trailer, with a cable . Possibly stainless. There is so much lost motion and its prone to bending and hence applying the brakes. Anyone any advice or experience . Ta Nik


If the rod is bending, something is wrong. Replacing it with a cable will only make it worse due to stretch. I have replaced galv rods with stainless ones in the past, but not with cables. It sounds like something is sticking or lack of support for the rod.
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Old 01 May 2017, 16:09   #5
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... or lack of support for the rod.
I'm liking that one. I had to add some support for the rod on my brakes - it was bouncing and dabbing the brakes on a little - enough to warm them.
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Old 01 May 2017, 16:30   #6
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I fitted return springs on mine to ensure they returned to off. I also rubbed away the thread as it was catching like a ratchet stopping the return.
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