PAS pinion seal replacement.

[Alun450]

After hearing of Derek's friend being taken so suddenly this seems like no big deal all of a sudden.

My PS rack is leaking from the pinion seal.
I've removed the rack and was wondering if it's a job I can do?
Has anyone done this repair, some pictures would be good.
I see Racing Green do the pinion seal (O ring)
Is it just better to get the rack re conditioned, I'd rather leave it alone as there's nothing else wrong with it.
In the photo you should just see it weeping out.

[WinstonWolf]

Do the Scooby conversion? I've had four rebuilds, I wouldn't bother resurrecting the TVR rack again personally.

[Alun450]

Maybe you've got a point there. Four re builds, that's why I'd rather do it myself. Which Scooby rack is the one to use, what year etc. sounds like a good plan.
My rack is fine other than the pinion seal, I'd like to try and repair it before giving in.
Any advice is always warmly welcomed. Al

[estutjaweh]

I replaced the pinion seal on mine last year with the rack in situ (and lying on the ground). It was a bh to do but only due to access issues and I was too lazy to remove the rack. If your rack is already out, then I'd just replace the seal.

You will find a very thin washer/shim behind the securing circlip when trying to access the seal. This shim was completely warped on mine so I had to fashion a new one. Other than that it was plain sailing.

[Alun450]

I haven't the foggiest idea. My rack is off the car so sounds easy!
Estutjaweh if you have time give me an idea where to start. The plastic cover, how to remove etc.
regards Al.



Those Allen bolts look very rusty and tight, will I need to remove them.
Thanks in advance Alun

[v8ndy]

Its a doddle job made even easier with the rack off, pull of the white cap and you`ll see its just a straight forward oil seal which can be easily leavered out with a small screwdriver. Nip along to your local bearing shop and they`ll probably have one on the shelf for around the pricey sum of 50p

[Alun450]

Wow that sounds more like it V8ndy, so just prise off the cap and I should find the culprit?
I'm not at all confident to touch it! I'll look at it for another hr first!

[Alun450]

So there's the circlip and seal below it, I can get one very easily. Rather rusty looking, my question now is
Will the bottom seal be leaking up to this seal?
How realistic is it to replace both pinion seals!
Anyone had a go at doing both! I'd hate to re assemble to find it still leaks.

[WinstonWolf]

Clinically clean before you dismantle. You know circlips have a right and a wrong way to go back in?

[estutjaweh]

...there is a bottom pinion seal too?? Didn't know that. I only replaced the top seal and that thin shim under it.

My rack didn't/doesn't have the dust cap either which now worry's me slightly. Are these available to purchase anywhere? If not...could you mail me the measurements of your cap before replacing it and I'll knock one up at work.

[estutjaweh]

...there is a bottom pinion seal too?? Didn't know that. I only replaced the top seal and that thin shim under it.

My rack didn't/doesn't have the dust cap either which now worry's me slightly. Are these available to purchase anywhere? If not...could you mail me the measurements of your cap before replacing it and I'll knock one up at work.

[Alun450]

It's 50 mm outside dia
The wall is about 2mm thick. It's also splined to slide onto shaft. Hope this pic helps.

[Alun450]

For you guys who might have to do this seal repair.
So
1 remove dust cover( white plastic)
2 remove internal circlip
3 remove very thin shim
4 remove oil seal
I used a small screw driver to prise up the oil seal.
Push the driver into the inner section of the seal and lever up and away. Do not scratch or hit the inner wall of the rack where the seal seats!

So now I just have to replace the seal and a shim.

I have no idea if it will seal again but if it works and I save 3 to 4 hundred quid it's got to be worth a try!
Yesterday I was just told send it away and pay the Tvr tax bracket! Wish me luck,
Thanks lads another Tvr guy hopefully saved by the knowledge shared. Many thanks, Alun

[Alun450]

Winstonwolf, yes I've got you, a rounded edge and a sharpe edge, like washers I've used if I'm correct!
When I removed circlip I observed it carefully thanks to your warning. Many thanks.

[WinstonWolf]

NP if you take one out again look carefully at the holes, they're tapered. The smallest part of the taper always faces the direction of extraction as it makes it easier for the pliers to get a purchase.

[estutjaweh]

Alun450 said:

It's 50 mm outside dia
The wall is about 2mm thick. It's also splined to slide onto shaft. Hope this pic helps.

Awesome - Thanks.

[Alun450]

It's amazing the things I learn on here everyday.