Shaft seals of a Saildrive 120S

[Chanquete]

How are the two external seals placed together on the shaft of a saildrive 120s? opposing with its springs or with the springs side by side?
I appreciate very much any knowledge.

 

[Slowtack]

I think one spring faces inward toward the oil and one faces outward...

 

[Martin_J]

Confirmed at page 69 here...

https://www.plaisance-pratique.com/IMG/pdf/VolvoMS2-SD120_manual.pdf

 

[Chanquete]

I think one spring faces inward toward the oil and one faces outward...

Thank you both so much! It's exactly what I needed to know.
Saludos!

 

[Slowtack]

De nada amigo...

 

[Halo]

If you are changing the shaft seals are you sure you don’t need to sleeve the shaft? Quite straight forward with a speedy seal

 

[Chanquete]

I thought about the possibility of a scratched surface.
I think speedy sleeves are used, but you have to place them with a special tool.
Do you have any suggestions regarding this?

 

[Chanquete]

I just watched the skf installation video

 

[Martin_J]

The speedi-sleeve does come with an 'installation tool' in the box. Trouble is, it is only open on one end and is not deep enough to push the sleeves on far enough.

To push them on, you will need something like a short (maybe 6inch) length of aluminium tube.

If you check out my post at the link below, I included a screenshot showing exactly what size tube fits!

S drive propshaft

 

[Martin_J]

And although I only posted one photo, if you scroll down to Cotemar's post on the Cruisers Forum, you will find a picture showing the full Speedi Sleeve install...

Saildrive Prop Shaft Repair - Page 3 - Cruisers & Sailing Forums

 

[Chanquete]

Thank you so much Martin!
I didn't realize that the installation tool was too short for our application.
Your post was very useful!

 

[Chanquete]

Do you remember your volvo penta saildrive 120S shaft measurements?

 

[Martin_J]

I don't have the measurements.. another forumite previously posted the shaft diameter.

Perhaps the following helps. This was my order to Bearings R Us back in 2021 for the shaft in my 120S-D leg..



I ordered enough to have two complete spares!!

 

[Martin_J]

I think if you take another look at the installation tool that comes with the seal (arrowed in the instructions below) you will realise why it can't install a seal much further along the shaft..

 

[Chanquete]

I don't have the measurements.. another forumite previously posted the shaft diameter.

Perhaps the following helps. This was my order to Bearings R Us back in 2021 for the shaft in my 120S-D leg..

View attachment 185975

I ordered enough to have two complete spares!!

 

[Chanquete]

Thanks Martin! It helps a lot!

 

[Hoist]

I had no idea this was a thing! I replaced the seals in our very tired leg last year. The VP dealer said max 1mm of groove and we have about 3mm. Still managed to get through the season without a milkshake but I will be looking into this!

 

[Martin_J]

I did read about someone who had issues with the sleeve cracking/failing when installed over a very deep groove.

Hard to imagine because the sleeves feel very strong and well made.

Perhaps worth filling a deep groove with an epoxy filler before installing a sleeve over the top to be sure...

 

[Martin_J]

I thought I was imagining the issue above. Looks like the installation manual suggests the same..