[vhgmcbuddy]

Do we understand why the shaft failed in the first place? There are a few other ideas I have but this will leave he shaft weaker and more prone to failure. Of course a failure could totally destroy the gearbox which wouldn’t be good. I would be happy to play with my Colebys since I know that they will never be used again for ploughing or any hard labour.

[vhgmcbuddy]

Hi I have a M1 rotorvator with a Briggs engine starts and runs fine if you put petrol in the carberetta but it won’t start without putting it in???

[vhgmcbuddy]

Orrrrr…..
make shaft bar the spline?
and we find a spline person ?

let me see what this spline drives and if I can do without it …..

[vhgmcbuddy]

Understood and thanks for looking. I did think how on earth is that made …..

I will not stop my search and will report when I find if it can be done and costs but I am sure it is a mad price at a machine shop and only possible with a mate who is bored and has a lathe type of job.

thanks J

[vhgmcbuddy]

For me, the spline is an issue and not something I would attempt at this stage, it’s step too far for me I’m afraid. Looking at the fracture it looks as if the steel has been hardened although the photos isn’t too clear in this respect.

If it wasn’t for the spline, I would have loved to have a go but I’m sure that a machine shop can knock something similar up fairly easily.

Certainly, on paper this is achievable. but I haven’t resurrected my skills enough yet. Sorry.

[vhgmcbuddy]

pic 4 is a diagram of shaft
pic 3 is how it sits
pic 2 is shaft removed
pic 1 is shaft
pic 5 is busted end of shaft

[vhgmcbuddy]

Right I have some details for you to chew on and see if this is possible.
An issue is that on one end it is spline. Other than that it is just a bar with a groove down middle (2 of at 180deg)

Attachments:

1. 
2. 
3. 
4. 
5. 
6. 

[vhgmcbuddy]

Right let me dress in rags and get the old transaxle apart. Stats to follow…

be great to at least know it is possible on paper.

[vhgmcbuddy]

If it’s the shaft with the green line over it, it’s the gear selector / first motion shaft with the two sliding selector keys (37) that engage with the inner dogs of the pinion gears just off the right of the image.

[vhgmcbuddy]

This certainly looks possible, what sort of diameter is it and how quickly do you need it. I guess there are bearings on the shaft and that’ll be the more difficult bit with tight tolerances for an interference fit and to get a smooth enough finish. They keyway shouldn’t be too much of an issue. What neck of the woods to you live in? I’m up North, Charlie might be able to give you my details.

If I can’t, most machine shops should be able to make one if they have the original part as a pattern.

The big issue for me is do you know what caused this to snap in the first place, it looks as if it must have been quite a load on this shaft for it to snap on the larger diameter. Also is the machine going to be used at it’s full capacity since any part machined is likely to be weaker than the original part.

[vhgmcbuddy]

I of course think if you can ….. you must try ………
It might be a project ?
It seems to be a 8″ long bar ? and cogs slipped onto it.
I am yet to look further at it as i got another.

I did put a post on here for my old transaxle but i cant find it.

I attach some pics and have the old transaxle still.
I can send details if you request.
Be great to at least know if on paper you could do it ?

Attachments:

1. 
2. 
3. 

[vhgmcbuddy]

If you can put a photo of the drive shaft on this post then I might be willing to have a go at making one, depending on how complicated it is. I’m starting to get into machining again and looking for simple projects. I suspect that this will have splines and will probably be a step too far for me at this stage, but lets see what’s involved.

[vhgmcbuddy]

I did once know about all the threads but after a few years all forgotten.

Hopefully it will fit …..
will inform .

[vhgmcbuddy]

Rollo,that would be so kind, I haven’t joined fully yet so I can’t pm you my email is coxeyswoodbodgering@gmail.com

Charlie, thanks keep forgetting to adjust my phone camera.

Andrew, I found someone selling several manuals and posters etc for various machinery but only had major, minorett and mk2 tractors but not sure if it’s the same person.

I’m currently refurbishing a husqvara mower then I start disassembling the Mountfield M1 in between decorating for swmbo lol 😂 😂

[vhgmcbuddy]

What a site this is! Us people where mowers have a name and have become part of the family couldn’t survive without em.
My last post was when I bust the transaxle on this mower. Due to the help on this site I / we diagnosed it and had to get a second hand one.

I still think if it goes again I am gonna have to; like for spitfire parts, get one made. Do we have a resident obsessional engineer on the site who can make drive shafts …..
madly I used to live next door to a guy who could in his garage ! alas he looks down us now.

thanks for help all.
concerns me however when no parts become available !

[Author]

Posts