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Removing And Fitting Primary Gear (Clutch) Oil Seal


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#1 bikenutmart

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Posted 06 April 2016 - 02:19 PM

How do I go about removing and refitting the clutch oil seal( orange) on my metro 1275 A+ engine, I have the housing off on the bench, which way does it come out, the Haynes manual says to use special tools, is it possible to do without them. Thanks Martin.



#2 Cooperman

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Posted 06 April 2016 - 03:00 PM

It will only come off one way, which is towards the end of the crankshaft, because the housing has a lip on the inner edge.

You can dig it out with a screwdriver. Re-fitting is easier if you have the correct tool, but it is not difficult if you don't have one.

Lightly oil the outside diameter of the seal, make sure it is the correct way round with the flat side outwards, and lightly push it into the housing to initially line it up.

It needs to go in very square until the outer face of the seal is about 0.010" in from the housing face. If you have a piece of steel tube this diameter it will help, but if not use a small mallet to tap it in, being careful to keep it square as you do this.

When sliding the seal over the splines of the primary gear, use masking tape over the splines to prevent the splines from damaging the lip of the seal.



#3 bikenutmart

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Posted 06 April 2016 - 04:47 PM

Thanks Cooperman, always best to ask if not sure. Mart.



#4 ukcooper

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Posted 06 April 2016 - 05:23 PM

or buy or loan one of these takes 5 secs to fit in the engine.

http://www.minispare...Tools.aspx|Back to shop

worth there weight in gold, but a little expensive for a one time use.

Edited by ukcooper, 06 April 2016 - 05:25 PM.


#5 olly33

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Posted 06 April 2016 - 09:19 PM

I had to buy that tool,which is a kick in the nuts for 1 time use...but its quick.
In my case the seal is leaking again,due to not breathing properly i think now,so maybe it will be use twice!

#6 bikenutmart

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Posted 07 April 2016 - 09:43 AM

Many Thanks for the tips! Mart.



#7 GraemeC

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Posted 07 April 2016 - 10:22 AM

It will only come off one way, which is towards the end of the crankshaft, because the housing has a lip on the inner edge.

 

Really? I've never noticed on any any casing.  If that was the case then surely the insertion tool wouldn't be designed to lust push the seal far enough, as it would have a register to seat it against?

 

I'm pretty sure that is the casing is on the bench I've always knocked them through backwards, with a blunt drift or suitable socket against the outer face.



#8 Icey

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Posted 07 April 2016 - 11:26 AM

or buy or loan one of these takes 5 secs to fit in the engine.

http://www.minispare...Tools.aspx|Back to shop

worth there weight in gold, but a little expensive for a one time use.

 

I bought the same tool from Somerford Minis, made the job very, very simple. I had/have a couple to change so the cost-per-job wasn't so bad.


Edited by Icey, 07 April 2016 - 11:26 AM.


#9 bikenutmart

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Posted 07 April 2016 - 02:34 PM

Definitely no lip, just knocked mine out! Mart.



#10 Cooperman

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Posted 07 April 2016 - 04:51 PM

Long time since \I did one and I have had the tool for many years. No lip then, my error.



#11 bikenutmart

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Posted 08 April 2016 - 10:00 AM

That's ok Cooperman, you are rarely wrong !! Mart.






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