Alko axle with flange locknut

Broadside · 05 March 2019, 21:09

Hi

I’ve got an Alko axle on a trailer which I’ve just replaced the bearings on. I was expecting to find a castle nut with split pin but there is a locking nut with a flange at the top, it was locked in place by the edge of the flange being pressed or punched.

Is there a special tool for this job or do you whack it with a punch to dent the flange in to the split axle stub? I’ve got a new nut, the picture is of the old one while I was removing it.

jeffstevens763@g · 05 March 2019, 21:20

It's a one shot nut one use only I forget the torque but it's quite high if you measure it its elliptical which is how it works

Broadside · 05 March 2019, 21:31

Thanks for the reply. The one shot nuts are usually around 290nm. This flange locknut only does up finger tight, it would usually be held in by a castle but and split pin but this axle needs this flange nut, I had never seen one before until I took it to bits!!

I’ve googled endlessly but can’t find out if there is s tool or you damage the flange with a punch tool.

There was another thread on this forum a few years ago where someone had the same nut but there was no mention of how the guy secured it. @spartacus?

Edit: just realised the photo I uploaded can’t be seen, not sure what has happened to it.

jeffstevens763@g · 06 March 2019, 06:17

this is what im on about

https://www.fieldfare.co.uk/alko-sty...RoCJx8QAvD_BwE

Pikey Dave · 06 March 2019, 06:33

Quote:

Originally Posted by Broadside

Hi

I’ve got an Alko axle on a trailer which I’ve just replaced the bearings on. I was expecting to find a castle nut with split pin but there is a locking nut with a flange at the top, it was locked in place by the edge of the flange being pressed or punched.

Is there a special tool for this job or do you whack it with a punch to dent the flange in to the split axle stub? I’ve got a new nut, the picture is of the old one while I was removing it.

What type of bearings are they? Taper roller or sealed waterproof ball?

jeffstevens763@g · 06 March 2019, 06:40

is it a washer under the nut that should just be folded up on two sides of the nut if so ive always done it with pliers and a hammer

Broadside · 06 March 2019, 07:24

Quote:

Originally Posted by Pikey Dave

What type of bearings are they? Taper roller or sealed waterproof ball?

They are taper roller bearings.

Here’s a link to the nut im talking about
https://www.trailertek.com/al-ko-hub-nut-special-b-for-stub-axles-without-split-pin

A bit more googling has shown this sort of but was once common on car wheel bearings. It’s apparently a stake nut and you use an air chisel to push the collar in to the split axle, I haven’t got one of them so screwdriver and lump hammer it is for me!!!!

Thanks for all the replies.

Broadside · 06 March 2019, 07:26

Here’s what it looks like when fixed in place.

https://goo.gl/images/7EviWa

If anyone has ideas on the easiest way to fix and remove then I’m all ears :-)

jeffstevens763@g · 06 March 2019, 07:28

Quote:

Originally Posted by Broadside

Here’s what it looks like when fixed in place.

https://goo.gl/images/7EviWa

If anyone has ideas on the easiest way to fix and remove then I’m all ears :-)

torque up hit with a hammer & flat punch job done drive pointed punch underneath to remove

Broadside · 06 March 2019, 07:47

Great, thanks I will give that a shot. ��

Pikey Dave · 06 March 2019, 09:13

New one on me that, every day’s a skool day[emoji106]

paintman · 06 March 2019, 11:05

You need to have a look at your pics again. The nuts in your pics aren't the same.
Note the difference between the three.
The staked one in the youtube video has a thinner section above the hex to enable staking into the slot on the threaded end of the stub axle. It has a larger flat area at the bearing end, effectively a built in washer.
The fieldfare 'alko style' one is the oneshot type & not staked.
But if you actually have the nut pictured in your link to TrailerTek then that is a staked hub nut. I wouldn't be surprised to find a washer between that nut & the bearing.

Staked hub nuts of the video type/TrailerTek type aren't unusual on cars - our Pug 306s had them on the rears.
To remove them it helps to use a pointed punch to ease the staked in part out which makes them easier to remove OR a breaker bar on a socket & brute force which will push the staked part out.
I have reused staked ones of that type providing the metal in the staked area hasn't broken away during removal but it is preferable to use new.
Use a flat ended tool & a hammer - or suitable piece of steel - to stake. Punch or big screwdriver works for me.

Broadside · 06 March 2019, 12:28

Thanks Paintman, I picked up the stake nut from Trailertek yesterday, you are right there is a washer that goes underneath it.

Thanks for the pointer about removing and reinstalling. It’s good to know people do this with a hand tool and hammer. I wasn’t sure I could put enough force to deform the nut in to the slot, but now I know it just needs to be hit really firmly!

Bobg · 06 March 2019, 15:57

I used a 3/4" drive torque wrench with a standard 24mm?. socket, and a piece of scaffold pole.
It took some force to undo it.
The nut is supposedly single use, however i have reused it a few times.
A standard 1/2" drive bar is not strong enough. I managed to shear off the square end and thus ruin a 1/2" torque wrench.

Pikey Dave · 06 March 2019, 16:16

Quote:

Originally Posted by Bobg

I used a 3/4" drive torque wrench with a standard 24mm?. socket, and a piece of scaffold pole.

It took some force to undo it.

The nut is supposedly single use, however i have reused it a few times.

A standard 1/2" drive bar is not strong enough. I managed to shear off the square end and thus ruin a 1/2" torque wrench.

Different nut, that’ll be the one shot.