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Old 03 May 2012, 15:00   #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, 15:12   #2
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He will be along shortly....

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Old 03 May 2012, 16:32   #3
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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, 16:34   #4
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Try a caravan dealers
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Old 03 May 2012, 16:41   #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, 16:57   #6
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On my caravan it's 290 Nm
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Old 03 May 2012, 17:00   #7
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Great help Mick - thanks
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Old 04 May 2012, 03:53   #8
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He will be along shortly....

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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, 04:59   #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, 13:15   #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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