OutdoorKing Repair Forum Forums Repairs and Maintenance Questions On Ride On Mowers Questions on Rover Ride On Mower Rover Rancher 01866 - Final Drive Sprockets

Hello, new member here hoping for a little help.

I've just purchased an older Rover Rancher mower and I'm yet to decipher a model No#, so having a bit of trouble finding accurate info on it. It's missing the top drive sprocket/chain but the drive set-up is more like a Greefield e2000 mower then any of the Rovers I've looked at with only one chain drive as apposed to multiples.

The plan was/is to replace the chain and both sprockets, too easy except the lower sprocket is welded on onto the axel, still not an issue I'll just get 2 new weld on sprockets with appropriate hubs. Except I don't know what the final drive ratio should be? Could this be the original top sprocket HERE

But then I can't find a suitable 65 tooth replacement for the lower sprocket, they all seem to jump from 60 to 72. But I can still build a suitable top and bottom sprocket to achieve a similar final drive to the original, If I can work out what that is supposed to be.


This is the mower in question if it helps.





Massive thanks in advance for any help offered,
Cheers

Hello harvo

A warm welcome to these forums.

I think I understand the issues here.
You have a Rover Auto-Drive, a copy of the Greenfield design.

Parts Lists may be found here:
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/7306/Rover_Ride_On_Information.html#Post7306

I think your link depicts an incorrect sprocket.
My reading is (best guess) this:-

Sprocket: A12327
https://www.outdoorking-forum.com.au/index.p...arch_in_description=1&keyword=A12327

Chain: A12335
https://www.outdoorking-forum.com.au/ride-on...ckets/genuine-rover-primary-chain-a12335

Rear Axle Assy: A10336
https://www.outdoorking-forum.com.au/index.p...arch_in_description=1&keyword=A10336




Hope this helps.
------------------------
Jack

Thanks for the welcome Jack, and for pointing me in the right direction.

The parts diagram you've posted is what has come up in all my searches which shows 2 drive chains, the machine I'm working with only has one chain with the small sprocket attached to the drive shaft (item No#. 7) going directly to the axle assembly (item No#. 60) The extra gear reduction of the Idler assembly (item No#. 16)has me worried if I order those parts my final drive could be way off.

You did however lead me to this post on the forum which appears to show part the correct model diagram. A part No#. for item 11 from that schematic (or tooth count) would be very helpful.

Link to thread



Cheers

Hello harvo
Okay, I learnt something there. Many apologies.
I believe your machine is a 01866
The later machine with second chain would be the 018166.

A12046 10 tooth


https://www.outdoorking-forum.com.au/lawn-mo...rover-ranger-rancher-sprocket-auto-drive

Hope this helps.
Jack

You are a legend, now if I can only find a matching 65T driven sprocket i'll be half way to mowing my lawn. Might have to go 11T-72T combo to keep a similar ratio.

Cheers

Hello Harvo

At least you now know the ratio now.

I'm sure you will solve this issue.
Please keep us informed as to your progress - as this is valuable
information for members repairing aging Rover ride-ons.

It would appear that the axle assembly (with sprocket) is still available.
It would be A10336 (replacing A10242).

https://www.outdoorking-forum.com.au/index.p...arch_in_description=1&keyword=A10336

Hope this helps.
------------------------
Jack

Thanks Jack,

Yeah those axles are as much as I paid for the mower. The plan at the moment is to run a sprocket carrier from a go-kart with a 30mm axle by sleeving my axle which is 1" diameter. The B type top sprockets can be had in almost any configuration but may modify a go-kart engine sprocket to suit.

something like this<----> and this

Pulled the axle today and will start working my magic on it tomorrow hopefully, Have sourced some used equipment from a kart racer on the cheap and should be fairly straight forward job

Quick up-date:

This is the gokart sprocket hub (30mm bore) and adapter to 1"(25.4mm) axle with a 6mm keyway,


Pre-assembly


Axle re-fitted to machine, sprocket alignment isn't perfect but we can make it work



Hopeful to get a chain and sprockets tomorrow and i'll have a better idea of where I'm at with it all,
Cheers Dan

G'day Dan

Many thanks for the update and photos.

I feel competent engineering (that you clearly have) show a way
forward in preserving older machines - where parts are not available, or
are not readily available, or are too expensive for the re-sale value of the machine.

You will end up with a nice little runner and cutter.

------------------------
Jack

Hi,

I've finally cut some grass with this thing after putting it on the back burner for a bit. Had to order the chain and sprockets from the states, top sprocket was easy off the shelf fit. Big sprocket is a generic A type plate sprocket thats been bored and drilled to suit the go-cart hub, alignment was good but had to muck around to get the chain adjusted correctly.


But anyway, here's the money shot.





Merry Christmas

Very nice job, well done, looks the goods

Hello harvo and Norm

Thanks for the photos.
I love stories that deliver a resolution.

I feel Norm liked this one because of the quality work.
This may well prove useful for similar repairs on vintage ride-ons.

Fantastic!
-------------------
Jack

You are right Jack, it is probably way over the top, but quality work always impresses me

Thanks,

I'd have to agree about it being overkill, I could have just welded the sprocket to the axel like the original as it will probably outlast the rest of the mower but I enjoy making stuff "better"

It dose squeal quite a bit when engaging forward/reverse have read that adjusting the friction plates can help or should I plan on replacing the cork clutch plates?

Cheers Dan