Thread: Toro Overdrive refurbishment

Hi Tim, thanks for the offer. Marshall at Zenith said he had one there to copy, but needs my Mainshaft to match them or something?

Thanks again!

Sam

Originally Posted by series3

Slowly slowly the bird builds their nest....

Killer's contact at zenith engineering is a good one, and can help me out. Thanks again Killer!
I need to remove the Mainshaft and send it up to them to match the gears on the inside of the shaft, but I am buggered if I know how to remove it?

There is a couple of thick spacers and circlips on the other end of the overdrive, is that where I start disassembly? Any pointers would be treaty appreciated by this floundering amateur.

Sam

just remove the small circlips and shaft will push straight out.To dismantle further,remove selector shaft and fork.Remove large circlip that retains rear bearing. Withdraw layshaft from back of case to allow cluster gear to fall away far enough to withdraw the large cylindrical output gear. lift synchro unit out through inspection hole. Fish out any needle thrust bearings,washers and synchr rings. With a suitable soft drift or piece of wood, drift out rear gear/ball bearing unit. lift out cluster gear, thrust and roller bearings.
Have a very good look for wear and pitting on the rear upper gear teeth and its mating gear on the cluster. If these aren't in good condition you may be wasting your time and money to go any further.
wagoo.

Thanks for the help Wagoo, Mainshaft is off

Is the part you're holding in your hand part 52 in post #9? The teeth on mine are badly worn and razor sharp and I'm afraid they may chip at any moment. Is that shaft with the inside gear all one piece?
Thany you Wally

Originally Posted by B.S.F.Nut

Is the part you're holding in your hand part 52 in post #9? The teeth on mine are badly worn and razor sharp and I'm afraid they may chip at any moment. Is that shaft with the inside gear all one piece?
Thany you Wally

Hi Wally,

Yep that is the one. It sits in the big gear (output?) when you remove the circlips, there is a bunch of washers and thrust things that come out as well from each end of the shaft. Just take note of what came from where as you go and it's easy peasy.

If you want more photos I can whip some up.

Sam

The Mainshaft is back from Zenith.

Now to figure out how to put the bastard back in!

I am starting to plan installing the overdrive, and then organising some kind of gearshift mechanism.

I have a fitting manual for a Superwinch/Fairey Overdrive, so will take guidelines from it. Also, this link should prove useful to myself/others:

http://www.landyowners.co.uk/blog/in...9;topic=3970.0

Here is a link to the TORO Manual.

I have a SUE PTO unit on at the moment, what things should I know before attempting to swap them? Any other tips/warnings?

Sam

Originally Posted by series3

The Mainshaft is back from Zenith.

Now to figure out how to put the bastard back in!

Sam.
How much do Zenith charge for the repair? I have a modified Fairey input shaft on my crawler box that will need re doing soon.
What's with the welding of the female spline on the end? I wonder if the welding has shrunk the diameter or annealed of the needle roller bearing surface just behind it? Do they re heat treat the shaft?
What are you going to do for a PTO now?
Wagoo.
Edit. The only tip I can think of right now.
When refitting overdrive to transfercase make sure you tight the hidden nuts first, otherwise, and this has happened a few times, you will break a piece from the overdrive bolt flange.