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Old 15 May 2018, 18:21   #11
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http://www.al-ko.co.uk/edit/files/ha...m-handbook.pdf
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Old 16 May 2018, 08:37   #12
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Quote:
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Thanks - I did have that - have you read it, does not really help.

I attach another version that Al-Ko produced for Indespension .... trailer all set as per these instructions (though pretty sparse)
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Old 18 May 2018, 19:10   #13
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Always do before I post a link

If all else fails see if a local caravan dealer's workshop will have a look as Al-ko are common on caravans. I do a lot of bodywork for one in Northamptonshire & they're puzzled too but do say can't diagnose without seeing it although defective/faulty parts & incorrect adjustment were mentioned.

May not be the issue, but note that the link I posted says that on one type of shoe they are indeed handed. Yours may not be that type.
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Old 18 May 2018, 19:17   #14
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The Al-Ko brakes on my trailer havs shoes that are definitely not handed, I swapped them a year ago ... all 8 were exactly the same.
Knott brakes are handed.

Disconnected the rod tonight and tested reversing ... no lock-up, so for sure it is rod actuating the brakes, and auto-reverse failing to activate is the case.
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Old 18 May 2018, 19:21   #15
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Trip to workshop time.
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Old 19 May 2018, 10:37   #16
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I think so ... just they have 2 week lead time.
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Old 19 May 2018, 11:34   #17
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Hard to say given all you have done but is it possible that the auto reverse mechanism is siezed? Replacements not too ridiculously priced. Example here ,,, but different ones for specific hub/brake sizes
https://www.trailertek.com/trailer-p...-and-2361drums
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Old 19 May 2018, 13:07   #18
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One last check ,,, if the shoes are not correctly adjusted, ie too slack, the auto reverse will not operate. The brakes will bind without going over on the cam. Adjust up until they lock whilst rotating forward, then back off a couple of clicks at a time until they are free. Operate the handbrake on an off a few times between each adjustment to centre the shoes. Do not worry about a slight rubbing noise caused by off centre. If you back off until there is absolutely no sound they are probably too loose.
Apologies if I am teaching grandma to suck eggs as they say
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Old 19 May 2018, 14:37   #19
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I thought that under adjustement could have been cause so rechecked all adjustment.
Tightened until locked up, then backed off until ... if you spin wheel it comes to stop in 1.5 turns.

Manually checked each auto reverse cam ... all free to move if pressed down, and return springs all fine.

I had to change 1 x Bowden cable, so thinking I’ll change the other 3.

Also although I fully clean the expander mechanism I dont lubricate.
One article suggests lubricating expander & auto reverse cam .... just have to find out what to use.
Being dumped in salt water unsure in I should be using Copaslip or some form of chain oil or similar.
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Old 19 May 2018, 15:14   #20
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Quote:
Originally Posted by Sargan View Post
I thought that under adjustement could have been cause so rechecked all adjustment.
Tightened until locked up, then backed off until ... if you spin wheel it comes to stop in 1.5 turns.

Manually checked each auto reverse cam ... all free to move if pressed down, and return springs all fine.

I had to change 1 x Bowden cable, so thinking Iíll change the other 3.

Also although I fully clean the expander mechanism I dont lubricate.
One article suggests lubricating expander & auto reverse cam .... just have to find out what to use.
Being dumped in salt water unsure in I should be using Copaslip or some form of chain oil or similar.
Castrol Moly lithium type grease is recommended by Alko... used sparingly
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