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Old 11 June 2018, 17:05   #91
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won't be able to do that as away .. and only back to take it in Friday.
Nobody has changed damper ...had trailer for 5 years and until now all been fine.


However maybe something physical ...i.e. coupling coming back further than supposed to ...and therefore overdrive of brake did has so much force it prevents auto reverse dropping shoes out.
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Old 12 June 2018, 05:57   #92
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Damper is the one as fitted from new - never been changed.
Worked fine reversing for 5 years.


The coupling retracts under pressure from car and pushes back out when pressure off.
So all moving OK.


Is it moving too far ? don't know.
Not aware on any adjustments.


No time this week due to being away.
It's booked in for Friday.
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Old 12 June 2018, 07:57   #93
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Originally Posted by Sargan View Post
Damper is the one as fitted from new - never been changed.
Worked fine reversing for 5 years.


The coupling retracts under pressure from car and pushes back out when pressure off.
So all moving OK.


Is it moving too far ? don't know.
Not aware on any adjustments.


No time this week due to being away.
It's booked in for Friday.
The damper can fail and lose its pressure, its designed so the coupling goes in slow to stop the brakes snatching on, if its weak that could be your problem.
But you havent determined where the fault lies yet so I guess its wait and see what the outcome is
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Old 12 June 2018, 09:24   #94
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After 6 weeks of loads of ideas ... you are right not identified the cause :-(
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Old 15 June 2018, 14:53   #95
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OK ... trailer booked in, 100 mile round trip.
It was with them all day .... you asked for update on what the cause was.
They checked damper & coupling - no fault.
Checked my set up of brake shoes - all fine.
Checked set up of rods & Bowden cables all fine.
Then stripped all 4 hubs, all assembled as should be ...

Final result - they have no idea what is causing this, and unable to resolve.
They did involve Indespension HQ .. nothing new suggested.

They are going to ask other Indespension outlets see if anyone else has had similar issue.
Good that my mechanical skills were not the cause ... but annoying no resolution.
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Old 16 June 2018, 05:28   #96
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Frustrating.
But if it's worked fine for 5 years including reversing up the slope you've suddenly started having this problem with I'm not convinced that there isn't a problem with the system.
Something has clearly changed but it's identifying what that is.
Strikes me that Indespension need to test at the place you're having the problem
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Old 16 June 2018, 05:33   #97
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Very frustrating but I agree with Paintman has to be an issue if its worked for all those years previously
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Old 16 June 2018, 06:18   #98
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Been into Indespension, they can’t find cause ... they ar3 not going to come to m6 house, but fault can be seen on the slight slope in their yard. If they can’t fix it I can’t force issue with them, not under warranty. They are going to ask all Indespension outlets via a group mail, maybe someone will have a solution.

My latest thought is that ... the drums have lost 3mm off wall thickness at the wear/contact area, so 6-8mm in diameter increase.
Now this should be OK, as the adjusters are still able to set up brake shoe gap ...if they couldn’t accommodate then drums would need changing.
Perhaps though this along with some wear on shoes alters the working angle of autoreverse cams and prevents them operating.

There were 2 lips formed either side of contact area, which showed the ~3mm wear... I machined off these lips last year (brakes fine for 12 months after that). And deliberately removed no material from the wear area ... just removed lips as new shoes were very slightly wider than previous shoes (friction material width)

If they don’t come up with idea by end of next week, will have to make up some ‘anti reverse brake operation block’.
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Old 16 June 2018, 07:13   #99
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Have you changed those rusty shoes you pictured?
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Old 16 June 2018, 07:28   #100
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Have you changed those rusty shoes you pictured?



yes ... but honestly - rust on shoes is irrelevant ...the friction lining is what is key, and no build on of rust on edge where it slots into cam.


You are putting mild steel into salt water - it rusts.


British trailers are years behind US trailers in that respect .... one US trailer I owned had hydraulic Stainless Steel disc brakes, those were totally unaffected by salt water.,
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