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Anyone fitted the Pi distrib drive seals ~ there are two of them .

These seals are hard to the touch   p/ n ref 145720

The seal nearest the distrib  is the more differcult of the two to put in without distorting it .

Thanks

distrib seal 145720 .PNG

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I have not fitted these yet, but see that the ones you can get Chris Wittor are Viton (brown ones) may be softer to fit? https://www.chriswitor.com/proddetail.php?prod=145720VK

Can you say where you got yours from, they don't look like the original seals, as these look to have an outer seal as well,  ones in the WSM drawing show only one lip.

I guess it needs to be fitted with a press, and the right sized dolly?

Why do we always have to double check the parts we get from suppliers?

John

Edited by John L
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Fitted the brown viton seals in the vice, which was easy. Note the tell tale hole needs to be in between.

Waldi

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Do you mean the pi Pedestal seals? as that's what your picture looks like--the pedestal does have 2 seals which are hard but not that difficult to fit if you make sure the assembly is absolutely clean and add a little lube on the outer surface of the seal whilst making sure you press them in square on - I used a socket of the nearest diameter if I remember rightly. 

 

Michael

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And when you insert the gear-shaft through them without proper protection, this will danage the seal. Refer to the WSM.

I did not have the speciaal “bullet cone” shown in the WSM, but used “shrink-tube”, (I mean the flexible pipe used in electric wires that shrinks when heated); this protected the seals from the sharp shaft end.

Waldi

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  Good points  ,the chris witor link is  very useful  as  Prestige use the brown version in their overhauls

My black ones are from Revington  and are the correct size . Rimmers offer the same type

The size/s  being on one of the seals taken out.  16    24     7

Thanks everyone, I guess that draws my enquiry to a conclusion.

 

 

Edited by cp7535he
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If you google “Viton lip seals” you will see that most of them are brown. But I do not know if this an indication for Viton material. It is worth though checking with Revington if these are indeed viton, given the effort needed to replace them.

Waldi

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Thanks Waldi  I intend to  fit these brown Viton seals.  It is not only Revington , its Rimmer , Moss and TRGB  [have not checked with TrShop ]   They all flog the back version ~  its kinda  ironic , given  that Chris Witor does  specialise  on the Triumph saloons.   Not sure if Neill  Ferguson [ K Raven Smith on Ebay]    refits  PI distributor drives . All the PI  drive pedestals I have taken off  over the years have shown black seals so finding out about the brown Viton ones is  interesting.  Either way I may well ask  Revingtons about  the black ones ~  all helps with the 'knowledge'   cheers    robin

 

 

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Hi Robin,

I looked at my seals, they were supplied by  Neil Ferguson who confirmed they are Viton. They are not brown (that is what I thought initially).The size is 15 x24x7, so the ID is one mm smaller than yours. I do not know which one is correct; mine fitted ok. Who has the answer?

Waldi

81CE3C9E-0F23-4706-B57D-4C6DEFB17335.jpeg

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Hi  waldi   ~ ok checked my used black seal and looking at a slight angle it reads as 15  not 16  not sure it if was the mould number or my eyes

so  it is 15 x 24 x 7   cheers robin

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  • 3 months later...

Just bringing this one back up, as I have an oil leak from the pedestal. I was trying to check if the leak is coming from the tell tale hole, but it actually looks like its coming from the o ring where the plug goes and i can rotate the plug suggesting the o ring isn't holding it. Anyway I was going to order the internal lipped seals also, can I just confirm, there is a small o ring on the plug, two lipped seals inside the pedestal and one larger o ring for the MU against the pedestal?

Cheers

Gareth

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Hi Gareth

Just replaced mine at the weekend - the old black ones were as hard as h*ll.

Your right about the placement of the seals - remember the orientation of the lip seals inside the pedestal.

Either buy or make (cornflakes packet) a new pedestal gasket.

Hope all goes well.

Cheers Neil 

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Thanks for clearing that up for me Neil.

How easy is it to fit the lip seals, do you use a socket and gently tap in or does it take a firmer hit? And was it easy to measure the amount the second one goes in so it doesn't block the tell tale hole, maybe by taping round the socket to the pre determined amount? 

Thanks

Gareth

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Gareth,

Fitting the lipseals is easy, note the orientation and keep the tell tale hole open.

Be careful when sliding the little gear shaft in, or you will damage the seals with the sharp edges of the slotted head of the shaft. Refer to the brown bible.

Waldi

 

Edit: I would use the O-ring between MU and pedestal.

Material for both seals and this O-ring:Viton-B

Edited by Waldi
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Thanks Waldi, I read about protecting the seals, and one suggestion is to use the conical end of a sealant tube, or I saw your idea in another thread about shrink wrap. 

Gareth

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  • 1 year later...

Further to this, I sorted the oil leak with the o ring, but lately I've noticed fuel at the tell tale hole. I checked the return line wasn't blocked. 

So I'm going to change the seals and o rings, but I have a couple of questions. 

1) When I remove the pedestal, will the distributor drive shaft come out with it, or does it stay in the block? 

2) Whether it stays in or not, in order to un mesh the gears between the MU drive shaft and distributor drive shaft, will that mean that one or both drive shafts turn to disengage? Meaning you have to fit them back at the position they came out so they turn back to the original position? 

3) If the distributor drive shaft does come out with the pedestal, will that also turn from the position it was in when it disengages from whatever drives it? 

Hope that makes sense. 

Gareth

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