First of all I want to Thank all that are involved in supplying & maintaining this web site & this form in particular! I recently purchased (ebay) a Berkut B-303 Below is a message I sent to Berkut Trikes and now post on this site in hopes of some info. & Help from the members of this Form.....Thank You All !


Is it possible to get a left side (as one sits in the seat) axle nut for a Berkut B-303 trike from you ? Or is it possible for you to refer me to a location,company, 0r web site that can help me with parts ? I also need two seat clamp screws. I also need to know in which direction (clock wise or counter clock wise) do I turn to remove the existing right side axle nut that is still in place ?
Thank You for your Help !
Trin



Edited 2 time(s). Last edit at 03/01/2012 07:50PM by peter.

Hi Trin,

I've put your post into a new thread and given it a title - more chance it'll get noticed.

Certainly first option is to contact Berkut, as you have:

[www.berkut-trikes.com]

I last heard from them just over two years ago:

[www.velovision.com]

They said they may still have some spares. Please do post again if they reply positively!

Otherwise, not sure what to suggest - might be a question of getting a new one made. If you are in the UK I can suggest some names of engineers who might take on such a job, if so. For this, a drawing or a sample to copy would be needed (chances are a right-hand nut could be copied, with threads and features reversed for left-hand use...)

To extract the right-hand axle nut, if it's the part I think it is, and assuming Berkut trikes work similarly to my AS one, simply turn it in the direction that would turn the wheel backwards (while holding the wheel rim still) and it should unscrew. So that should be anticlockwise as you look onto the right and axle end.

Good luck!

Peter

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Peter Eland - Velo Vision publisher



Edited 2 time(s). Last edit at 03/01/2012 08:06PM by peter.

Just had a thought - by 'axle nut' do you mean the 'hub cap' which screws into the wheel (as per my instructions to hold the rim, above) or the toothed nut on the drive shaft end, inside the hub when assembled?

On mine the original drive shaft nut looks like this:



Those are relatively simple to machine from solid if no spares are forthcoming. Ideally you'd make it (or have it made) from some steel capable of being hardened by heat treatment, but as a quick fix I made a replacement from stainless steel, and it held up reasonably well for a while:



Would be interested to see pictures of your Berkut's drive parts to see how they differ from my S-327.

--
Peter Eland - Velo Vision publisher

Thanks Peter,
Sorry about the delay in responding, Thanks for the info on right side nut removal. Yes, The nut does look just as your original nut looks as in your top picture(the one w/snap ring & allen head shown). I did hear back from Berkut , rather amusing.
" Thanks for your letter.
Unfortunately, we Trike temporarily are not made.
We will inform you, in case of the beginning of works.
Model 303 is not made since the last century) …
The design has been changed (the photo) see.
All than I can help you is a drawing from archive.
And to tell that on the right – the right carving. And with at the left – the left carving.
I sincerely wish you success.
Vadim Mazaev. "
The ,"Last Century " business was a nice touch.
So, my quest goes on. I emailed the guy I bought it from in hopes he would be able to tell me where he got the trike. No response as of yet. I am still in hopes of some sort of lead from this thread.
I do not live in England. I am an Illinois (USA) resident, and will pursue the machining of a nut if all else fails.
Thanks ,
Trin

Good luck! I don't know of anyone with a stash of spares for any of these trikes - anyone with parts will likely be hanging onto the spares for themselves! But worth a try!

I suspect you'll have to end up going down the machining path. If you do, it might be worth getting a few spares made at the same time to sell (here or elsewhere) to other owners, as well as for your own future use. Likely a lot of the cost will be in the set-up, so making a few more once that's done won't add too much.

Not many Berkut owners have announced their presence on here so far unfortunately but there may be lurkers...

Cheers!

Peter

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Peter Eland - Velo Vision publisher

Dear Peter,
If indeed I will have to get this nut machined, I need to know the thread size/pitch. Could you supply me with that information ? Although apparently an "A S" nut would work. I guess they are in no more supply than the Berkut original ?
Below I tried to include your message & picture of your axle/nut on previous message. Having not given up hope that someone could possibly help in this dilemma.

On mine the original drive shaft nut looks like this:

[www.velovision.co.uk]

Thanks,
Trin

Hi Trin,

No, unfortunately there's no supply of any parts for any of these trikes :-(

I don't know the thread details off-hand, but it should be easy for a machinist to measure from a sample. It will be a metric (millimetre) pitch for sure. I'd rather not disassemble mine to measure it but let me know if it is necessary and I'll see what I can do.

ISTR I also have an old broken one somewhere, which I'll be able to measure easily if I can find it...

Peter

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Peter Eland - Velo Vision publisher

Please Peter,
Don't bother . I have the wheel off the side w/o the nut. That is something I can do myself. I am just glad the threads are metric. I was not sure what the Russian manufacturing standard might be. There in the last century .
trin

Actually I just found my broken one and while the threads aren't pristine I'm pretty certain it's M16x1 i.e. a standard metric fine thread, 16mm nominal diameter, 1 mm pitch :-)

--
Peter Eland - Velo Vision publisher

Thank You, Peter , You have been very helpful!.......trin