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Happijack broke !

Posted: September 1st, 2017, 7:20 pm
by Mike
Annoying as the jack broke just as we were loading to go to Scotland for a two week trip, tried to get appart but it's beaten me and I don't have time to do much with it this evening, so probably looking at a new one. Doh.

Re: Happijack broke !

Posted: September 1st, 2017, 7:38 pm
by zildjian
Oh dear Mike, that sort of thing usually happens to me as i'm getting ready to go, whats busted or not happening?

Re: Happijack broke !

Posted: September 1st, 2017, 8:13 pm
by Mike
The inner leg isn't moving the motor turns etc and I can pull the leg in and out so something in the drive, threadded part has bust I think, just emailed happijack for advice and will call niche I the morning session if they have one to sell. Could pop in on our way back from Scotland maybe

Re: Happijack broke !

Posted: September 1st, 2017, 8:26 pm
by zildjian
Might only be a roll pin that locates motor drive>inner leg

pin passes through corresponding holes in both pieces and is sprung open slightly to pinch the two, they get old and either drop out or get shredded sometimes

I nearly bought a set of HJ off ebay last month as well

Re: Happijack broke !

Posted: September 1st, 2017, 9:08 pm
by Mike
Well happijack got back on e mail within an hour and said
It appears that the acme nut is no longer working with the drive screw. Over time, they sometimes get small particles of corrosion or something that gets embedded with the grease, and it eventually grinds away the threads on the nut. That mechanism is sealed inside the leg and is not repairable. Your option is to replace with model 4160 (direct replacement), our part #308169.

Hmm so it seems like they want to sell new rather than repair.

Re: Happijack broke !

Posted: September 1st, 2017, 9:47 pm
by zildjian
Guess you can't manage with it so a new one and repair if possible your existing perhaps, TBH I can quite see the grease trapping debris
on other jacks I'm not convinced using a torquey drill is a great idea given the cost

Re: Happijack broke !

Posted: September 2nd, 2017, 5:52 pm
by Big Jim
The nut on my jack failed . I got it apart with some difficulty . The nut is a "special" made from what looks like Nylon . I did enquire about having them remade in bronze , but it didn't really add up . The legs from USA are not a bad price but with shipping and VAT it is not much different from Niche .

Re: Happijack broke !

Posted: September 2nd, 2017, 6:39 pm
by wonkywheel
Accrugroup supply various lead screws and nuts
https://www.accu.co.uk
They might have something that fits.