Author Topic: Primary case leak  (Read 470 times)

Offline RoyC

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Primary case leak
« on: 23.05. 2017 15:28 »
I had the bike running proberley for the first time today since I purchased it.
After it had been running for about 15mins and I had turned it off, I noticed a small pool of ATF under the bike, it was coming from the back of the primary case (clutch area).
I am assuming that a new sealing washer (42-7504) will fix it.
Is there anything else that I should be looking at or replacing while I am in there?
Thanks,
Roy.
My bike is a 1958 A7SS
Staffordshire UK

Online Greybeard

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Re: Primary case leak
« Reply #1 on: 23.05. 2017 15:57 »
There you are; proof that using different coloured lubricants is a great idea.

Offline Topdad

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Re: Primary case leak
« Reply #2 on: 23.05. 2017 16:37 »
Roy, have you got to much ATF in the case ? If you have it'll still chuck it out ,only needs to allow the chain to touch the fluid any more ad it's everywhere,particularly the floor  *problem*
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Offline RoyC

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Re: Primary case leak
« Reply #3 on: 23.05. 2017 17:23 »
Roy, have you got to much ATF in the case ? If you have it'll still chuck it out ,only needs to allow the chain to touch the fluid any more ad it's everywhere,particularly the floor  *problem*

I filled it up until it ran out of the level pipe, so should have been bang on before some of it ran out.
My bike is a 1958 A7SS
Staffordshire UK

Offline ellis

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Re: Primary case leak
« Reply #4 on: 23.05. 2017 17:58 »
Not necessarily. I fitted one of these stainless level tubes and the level was too high. Measure 190 cc of whichever oil you prefer and  you will find it just wetting the chain . Doesn't need to be swimming in the stuff. Also helps the clutch from getting saturated.  *smil*

ELLIS

Online JulianS

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Re: Primary case leak
« Reply #5 on: 23.05. 2017 17:59 »
That is not the right one - looks like its from an early A65 gearbox. The pipe should be about 7/8 inch long.

See photo of the part from my A10.

Too much oil.

Drain and refil with 225cc of oil and the problem may be gone.

Offline RoyC

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Re: Primary case leak
« Reply #6 on: 23.05. 2017 18:50 »
That is not the right one - looks like its from an early A65 gearbox. The pipe should be about 7/8 inch long.

See photo of the part from my A10.

Too much oil.

Drain and refill with 225cc of oil and the problem may be gone.
Thanks Julian.
I will shorten the pipe to 7/8"
My bike is a 1958 A7SS
Staffordshire UK

Offline RoyC

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Re: Primary case leak
« Reply #7 on: 23.05. 2017 18:52 »
Not necessarily. I fitted one of these stainless level tubes and the level was too high. Measure 190 cc of whichever oil you prefer and  you will find it just wetting the chain . Doesn't need to be swimming in the stuff. Also helps the clutch from getting saturated.  *smil*

ELLIS
Thanks for that info Ellis.
My bike is a 1958 A7SS
Staffordshire UK

Offline RoyC

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Re: Primary case leak
« Reply #8 on: 24.05. 2017 15:52 »
Hands up all those that said, "too much oil". Well done.  *respect*
I removed the drain plug and drained out eleven Fl oz, that is still three fl oz too much besides all of the fluid that leaked out.
I cut the level pipe down to 7/8", replaced it and filled with eight fl oz of new Dexron 3, fired up the bike and let it run, NO LEAK  *grins*
Thanks every one.
My bike is a 1958 A7SS
Staffordshire UK