Ford 7810 series 3, rear pto seal leaking ?

[Pennine Ploughing]

Rear pto seal is leaking touch of oil, it's 77 in the diagram below that needs replacing.
Question is, is there a tip or trick in doing this, as I have a feeling that it might all collapse inside trying to get it out,
So I,m thinking of leaving the 1000 rpm shaft in situ, bolting a hemmel plate to drawbar with hitch locked up, slip new seal over shaft end loosely, and then putting a jottle back in from plate to shaft end to hold it all in place, then undoing the housing bolts and extracting the old seal and cutting it off shaft, then slip new seal over shaft and press it home to fit, then replace outer housing, would this work ?

As I have heard the there is shims, bearings etc, can drop into to bottom of backend if not careful

Thank in advance

 

[yellowbelly]

We used to take the pto shaft out and put a big screwdriver in it's place to stop that brass coloured shim slipping down.
It's a long time since I did one but I don't think that diagram is very accurate - I think the shaft (65) fits into the hub (70) and the seal (77) goes round the hub.
Changing the seal doesn't always stop the leak 'cos, depending how much work it's done, the place where it sits on the hub gets worn.

We used to keep a spare one and get it built up and turned back down to size in case we needed to change both.

 

[Pennine Ploughing]

We used to take the pto shaft out and put a big screwdriver in it's place to stop that brass coloured shim slipping down.
It's a long time since I did one but I don't think that diagram is very accurate - I think the shaft (65) fits into the hub (70) and the seal (77) goes round the hub.
Changing the seal doesn't always stop the leak 'cos, depending how much work it's done, the place where it sits on the hub gets worn.

We used to keep a spare one and get it built up and turned back down to size in case we needed to change both.

I'm thinking shaft 65, goes through 70 all the way to sit in bearing 66,
And I,m thinking of holding it all together with shaft 65,
And think seal 77, seals on hub 70, is that right, I not done one before

 

[zero]

I changed ours years ago, i was very lucky nothing dropped down as I didn't know you needed to put the pto shaft back in!
There is a specific order to remove and hold the internal parts so nothing drops out of place but it's along while since it was explained to me.

 

[forblue]

First don't undo bolts and pill shaft out as stated it will be a big job then, run tractor up a strong pair of ramp's or onto two blocks to get back wheels up you may still lose some oil, then remove two of four bolts and undo the other two about 10mm prize cover away and wedge screwdriver or two old bolts between axle housing and cover then knock shaft in, keep doing this with thicker old bolts until cover comes away leaving pto shaft in place, when fitting new seal make certain to fit correctly if a cassette one it will have words airside which is to outside of cover.

 

[Vincent]

Check or replace o ring 73 first it could be the problem and a lot easier to replace.

 

[Pennine Ploughing]

First don't undo bolts and pill shaft out as stated it will be a big job then, run tractor up a strong pair of ramp's or onto two blocks to get back wheels up you may still lose some oil, then remove two of four bolts and undo the other two about 10mm prize cover away and wedge screwdriver or two old bolts between axle housing and cover then knock shaft in, keep doing this with thicker old bolts until cover comes away leaving pto shaft in place, when fitting new seal make certain to fit correctly if a cassette one it will have words airside which is to outside of cover.

Thanks for that information, that sounds logical and a better way to what I thought,
Got a clutch plate to put in it next week, and thought we would do rear seal as it's leaking ,

Thanks

 

[Pennine Ploughing]

Check or replace o ring 73 first it could be the problem and a lot easier to replace.

That's been done, it definitely 77 weeping

 

[Boomerang]

Had ours done by a guy who knew what he was doing . .
Parked front wheels in a furrow , he said if he got it wrong and bits dropped inside it was a split tractor job , so you need to be careful..