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I have Alko 2004 stabiliser which has been getting progressively more difficult to close. It now only gets slightly beyond the start of resistance [resistance starts at the expected point] before stopping me fully closing the stabiliser handle. I have had to jump on the handle in the past for it to close but even now this doesn't appear to work [I know I shouldn't do this!!]. I can close it easily without the tow ball being  inserted or with just the Alko lock ball in place. I have resorted to replacing all the friction pads and have even removed the side shims without any joy. I think it may even be worse. When I attemp to close it I do see the imprints of the friction pads on the tow ball. The towball is Alko spec A50-X. The Part number on the ball is 1385201 although the Alko web site says it should be 1385401.   Not sure there is such a ball type......maybe just a typo error.I did change my car 2 years ago and hence new tow ball but not sure if problem started then but it certainly has got worse. Anyone got any ideas??

As far as I know you need an alko towball for the alko stabiliser, check the circumference of your tow ball it should be 50mm.

the 5401 type is the extended neck type that should be used with the 2004 stabiliser.all are 50mm as standard whichever you use.

5401

http://www.ukcampsite.co.uk/redirect.asp?redir=http://www.towsure.com/category/7187-Towballs_and_Pins