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rick

On 07/05/2018 10:25, wrote:
On Monday, 7 May 2018 08:39:37 UTC+1, rick wrote:
Have a twin axle trailer.
Each year service hubs ... wash out all grease, repack, new seals, clean
drums etc. Adjust brakes
The reverse override link & spring are not removed during service (AlKo
instructions)

The brakes are AlKo auto reverse type.
Going fwd brakes work fine, stationary handbrakes applies and holds.

In reverse after a short distance (presume until hitch damper completes
travel) the brakes lock on.
If I unhook trailer and manoeuvre by hand it will reverse with no issue
.... so only a problem when push rod activates.

Any suggestions ?

It's been a while so others may be more up to date or complete on this. Overrun brakes will do that if the spring stopping them acting is too weak, or if the car is jerked backward.

NT

All 4 hubs are locking on ... so unlikely all 4 springs went weak at
same time ..... must be something common, I'll try resetting actuating rod.