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Old 03 May 2012, 14:00   #1
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Alko One Shot Nuts

Hi

Had a great response to my last post on Ribnet - thanks.

I have a Bramber trailer and have done my pre-season greasing of the hubs however I can't locate the correct size one shot nuts to replace. Mine are only 19mm - the only ones I can find are 32mm or 36mm. My local Indespension cant help....can you ? Cheers
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Old 03 May 2012, 14:12   #2
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He will be along shortly....

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Old 03 May 2012, 15:32   #3
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Originally Posted by Skinnyrib View Post
I have a Bramber trailer and have done my pre-season greasing of the hubs however I can't locate the correct size one shot nuts to replace. Mine are only 19mm - the only ones I can find are 32mm or 36mm. My local Indespension cant help....can you?
Sure they're 19mm? I just did my Rapide trailer (750kg unbraked) which has Alko stub axles and waterproof bearings. The thread is M16 (24mm socket). Found the smaller 'one shot' Alko hub nut here: AL-KO UNBRAKED ONE SHOT HUB NUT

Not wishing to hi-jack your thread - I have a query for trailer guy too. I'll take a seat!

My query is that I'm used to castle nuts with split pins. These Alko 'one shot' nuts are new to me. I dismantled the hubs to regrease. Although waterproof bearings are fitted, the grease does get thinner and contaminated with use. Better safe than sorry in my book. Anyway, cut a long story short. Cleaned hub and bearings, regreased with Starbrite bearing grease (which is strange stuff). Everything I've read about these nuts is to torque them when refitting. Is that just for braked hubs? When I removed the original nuts they had been punched on either side of the shoulder to engage with the slotted end of the hub, I'm sure just as a safety precaution. They weren't on super-tight, and that was from new from Ribcraft a couple of years ago. If I over torque the hub nut - surely this will simply over-tighten the bearing and result in over-heating, premature wear, etc.

What's the correct way to fit these please?
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Old 03 May 2012, 15:34   #4
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Try a caravan dealers
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Old 03 May 2012, 15:41   #5
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Fantastic - thats what I need ! I'll order some tomorrow- many thanks !

But I have the same question regarding the tightening of the hub nuts......they weren't on very tight at all..........? And as you say to overtighten inhibits the performance of the bearings.....
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Old 03 May 2012, 15:57   #6
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On my caravan it's 290 Nm
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Old 03 May 2012, 16:00   #7
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Great help Mick - thanks
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Old 04 May 2012, 02:53   #8
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you're so cruel! If I hadn't been out shooting I'd have been along sooner!
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Old 04 May 2012, 03:59   #9
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Mick's spot on, Alko torque settings, for one shot nuts, is 290Nm + or - 10Nm (214 lbs/ft + or - 7.5 lbs/ft)

I don't believe there's any difference due to nut size. Spoke to a caravan chappy near me and he's of the same opinion.
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Old 05 May 2012, 12:15   #10
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Thanks for this Trailer Guy - the one shot nuts didn't arrive in the post this morning however 290nm "sounds" very tight ( I have arranged to borrow a torque wrench)> I have read elsewhere that these nuts should be just nipped up slightly tighter than finger tight - is this 290nm tight - and then punched into the slot ?? 250 mile journey next weekend - just want all to be OK !

Cheers
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Old 05 May 2012, 12:32   #11
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290 nm is a big bar wrench not a small Halfrauds special if your not sure what you are doing get someone in that does
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Old 05 May 2012, 14:59   #12
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I put the one shot nuts on today, but haven't tightened them to 290Nm. I don't doubt the caravan ones are meant to be torqued, but they're a different style. When the existing nuts came off they weren't torqued, and came off relatively easily, after I'd knocked out the pinch on them. I put them on tighter than finger tight (checked at 10 to 2 position on the wheel) that there was not lateral movement and not too tight that there would be bearing rumble when spun the wheel. There is no friction at all when tightening them, they literally screw on by hand, then ratchet for the last couple of turns. Happy with the setting, I then nipped them to engage with the cross-head on the stub axle, grease cap on, etc.

If they have to come off again, then obviously I'd renew the nuts. I will check them after the next trip out.

I've tightened driveshaft bolts on my own car (Audi Quattro avant), and they're on rediciously tight, and can only be achieved by using an extension bar to achieve the correct torque setting - so I know what 290Nm feels like.
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Old 05 May 2012, 17:48   #13
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Call me wreck-less if you like, but i have re-used my one shot alko hub nuts 3-4 times over now without any issues. I managed to source the wheel bearings from a car parts warehouse for 14 each but they do not include the one shot nuts. I've just reused them time and again with no problems, and they still bind tight as they go on, like the brand new ones i used to get with the original wheel bearings did. I tighten them a bit more after the torque with a 4ft tube to make sure they are "bar tight"
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Old 06 May 2012, 03:15   #14
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I reused mine & put them back with a bit of red thred lock on them & use a 4' bar to tighten them back up!
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Old 06 May 2012, 03:24   #15
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http://www.westerntowing.co.uk/acatalog/Hub_Nuts.html
http://www.tauntontrailers.co.uk/al-...-nut-244-p.asp
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Old 06 May 2012, 07:27   #16
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Old 06 May 2012, 10:59   #17
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I reused mine & put them back with a bit of red thred lock on them & use a 4' bar to tighten them back up!
Thats a hell of a risk to take to save 3.50
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Old 06 May 2012, 11:08   #18
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Thats a hell of a risk to take to save 3.50
That's what I thought av seen enough 1 wheeled trailers in my time not to risk it for 10
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Old 06 May 2012, 11:55   #19
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Thats a hell of a risk to take to save 3.50
Yep I now have a new axle with taper roller bearings again so no problem changing them!
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