44 replies to this topic

[tiger99]

No, the O ring does not and can not seal the bush.There remains a leakage path around the rod. So it is the seal that does all the sealing. It works better when it is relieved of having to be a bearing as well.

[tiger99]

No, the O ring does not and can not seal the bush.There remains a leakage path around the rod. So it is the seal that does all the sealing. It works better when it is relieved of having to be a bearing as well.

[tiger99]

Apologies for duplicate post. As for fitting an O ring inside the bush, don't bother. It has completely the wrong profile to seal on a shaft which both rotates and reciprocate. For that you need a lip seal, and if the shaft and bush are in good order the standard lip seal is adequate. You can get lip seals in other materials, which may be worth trying. I doubt that Viton will be the best, but there are others. See any seal manufacturers Web site.

[Mini Manannán]

My shaft is pitted. Oo er!  So I had thought that an extra O-ring might help.  Simply Bearings do a good range of Viton: http://simplybearing...p?cPath=19_4462  I'll get measured up and try one on them.

[Guess-Works.com]

My recommendation is, change the o ring. Its more likely to piss oil with an old one than new.

[Spider]

We're considering getting hold of a Viton seal which should last longer.   Might work, but whether Viton is soft enough to seal well is another thing. Also, machining an O-ring groove on the inside of the aluminium support.

 

Matt Reed - Reedspeed - here in Aust has his made like that.

[Mini Manannán]

 

We're considering getting hold of a Viton seal which should last longer.   Might work, but whether Viton is soft enough to seal well is another thing. Also, machining an O-ring groove on the inside of the aluminium support.

 

Matt Reed - Reedspeed - here in Aust has his made like that.

 

 

The Viton bit or the O-ring bit Chris? Or both?

[Spider]

 

 

We're considering getting hold of a Viton seal which should last longer.   Might work, but whether Viton is soft enough to seal well is another thing. Also, machining an O-ring groove on the inside of the aluminium support.

 

Matt Reed - Reedspeed - here in Aust has his made like that.

 

 

The Viton bit or the O-ring bit Chris? Or both?

 

 

Not sure what O Ring material he fits, but the Aluminium Ring has the groove on the Inside.

 

Viton would be fine to fit here.

[jt19]

Ok I'm going to do this with engine in situ.
The rubber outside seal us old and leaking. I have the kit with the aluminium bush and the rubber bush. Do I still need to removerify both or just the rubber seal? I'm going to use some sealant just to make sure!!

[Spider]

My shaft is pitted. Oo er!  So I had thought that an extra O-ring might help.  Simply Bearings do a good range of Viton: http://simplybearing...p?cPath=19_4462  I'll get measured up and try one on them.

 

Tim, I just picked up on this post of yours. Hmmmmm,,,,,,,, nothing to loose by trying I guess, but not hopeful.

 

One further idea, but needs a little homework would be to fit a sleeve over the pitted shaft, but it can't go in to far and need to be tight (read: seal) on the shaft. Then fit a seal with an appropriate sized ID.

 

Ok I'm going to do this with engine in situ.
The rubber outside seal us old and leaking. I have the kit with the aluminium bush and the rubber bush. Do I still need to removerify both or just the rubber seal? I'm going to use some sealant just to make sure!!

 

If you already have the Aluminium Bush in there, it's probably a wise idea to remove the old one as, despite any myths, they do wear.

 

If you don't have the Aluminium Bush in there, it can be fitted after first removing the old seal.

 

Have a look at the Bore for the Bush in the Diff Cap before fitting up. If it's not damaged, then fit up the new seal dry of sealant, but grease between the seal lips.

Edited by Moke Spider, 23 August 2016 - 09:53 PM.

[Andrew22-10]

Hey, if anyone is still having an issue with sealing the selector rod, i found a solution. if you take the alloy o-ring from the "mini spares" kit and get a grove machined into the inside of it to fit a second rubber o-ring, it will seal the casing and the shaft at the same time.            IMG_0294.JPG   46.76K   7 downloads

 

 

I hope this helps.

Edited by Andrew22-10, 16 September 2016 - 08:23 PM.

[Magneto]

A o-ring is not designed to seal a shaft sliding back and forth thru the o-ring, an o-ring is more of a static seal. It might work for a while but will wear quickly.

I've hear some people mount two seals rather than the aluminum support piece....

Edited by Magneto, 17 September 2016 - 09:20 PM.

[Spider]

The O ring is not there as a seal what so ever. It's only to hold the Aluminium Bush in place.

[Magneto]

He's talking about adding an o-ring in the center to help control the oil leak, I'm saying it will help for a while but it's not a long term solution.

[tiger99]

It is only a very short term solution for reasons already stated. It is quicker and cheaper to do the job properly
If you want to machine anything, let it be a new bush of proper bearing material such as oilite, with O ring groove externally, and the normal seal. Or better, make the bush a bit shorter and fit two external seals, the outer one being there simply to scrape dirt off the rod before it can damage the inner seal.