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| Flywheel nut which way to turn ? |
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Message |
    
rob.sollart
New member
Username: robsollart
Post Number: 1
Registered: 03-2012
| | Posted on Tuesday, March 06, 2012 - 01:29 pm: | 
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Hallo,
For my work, I'm doing a restoration of a beautifull old english gentlemens sailing yacht.
In this boat there is a lovely old stuart engine, the owner never used it, it did not work. From what I've already been reading on this forum I learned that it is a P5m.
I got it running, but the problem is that the compression collar on the crankshaft is leaking.
So I have to open the engine, but first I must turn of the flywheel nut. Can anyone please tell me if it is a normal right hand turning thread which I must turn left to loosen it, or is it a left hand nut? It is very tight, I have to apply a lot of force, and I don't want to breake something.
I would be very greatful about any information. |
David Earle-Payne
New member
Username: hyperion
Post Number: 1
Registered: 02-2012
| | Posted on Tuesday, March 06, 2012 - 04:59 pm: |
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Should it be opposite to the direction of the flywheel rotation? |
rob.sollart
New member
Username: robsollart
Post Number: 2
Registered: 03-2012
| | Posted on Wednesday, March 07, 2012 - 12:42 pm: |
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Well, I don't know, perhaps, that's my question. |
David Myers
Senior Member
Username: dave_myers
Post Number: 116
Registered: 11-2006
| | Posted on Wednesday, March 07, 2012 - 05:31 pm: |
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Rob,
It's a standard Right Hand Thread... In other words turn it to the Left to undo it.
Dave. in OZ |
rob.sollart
New member
Username: robsollart
Post Number: 3
Registered: 03-2012
| | Posted on Wednesday, March 07, 2012 - 06:48 pm: |
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Thanks a lot, Dave, this is the answer that makes me happy!
Tomorrow I'm gonna use the powertool, I'll let you know about the results.
Everybody on the boatyard loves the "Phoebe" because she's such a beauty, I've always had a crush for her antique little engine.
Now that I was asked to do some woodwork on the boat, I finally have the opportunity to do something extra for the engine as well.
It was all rusty and stuck, dirty watery mudd came out off the drain, there was "mayonaise" in the reverse gear box, I ve done a lot allready, but now the final goal, the crankshaft sealing.
Dave, I'm from Holland, I know some English, but what is the meaning of: "in OZ" ?
Rob |
David Myers
Senior Member
Username: dave_myers
Post Number: 117
Registered: 11-2006
| | Posted on Wednesday, March 07, 2012 - 08:02 pm: |
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Rob,
"in OZ" is slang for Australia.
There is a Stuart Turner Yahoo Group quite active just dealing with ST engines. They have an extensive library on almost every ST ever produced with Workshop Manuals in the files section. They are based in England and the Guy's are very helpful. The URL for the site is...
http://groups.yahoo.com/group/stinfoexchange/
Have a look and join the group. They may be a source of Crank Seals for you as Fairways closed a few years ago. I converted my P55 to Neoprene Lip Seals which are carried by most Bearing Supply houses.
Watch out when removing Flywheel as there is a tapered Cone that the Flywheel sits against. Just loosen the Nut about 3 turns and give the Flywheel a sharp knock on the side with a hammer to loosen it on the taper. You then have to split the Crankcase to remove the Cone and get to the Seal.
Good luck with the renovation.
Cheers,
Dave |
rob.sollart
Member
Username: robsollart
Post Number: 4
Registered: 03-2012
| | Posted on Friday, March 09, 2012 - 02:29 pm: |
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Hi Dave,
from the land down under
The flywheel nut came off, but several knocks with a hammer on the side did not yet loosen the flywheel. How hard may I hit it?
I think I will have to make some kind of puller.
I already found the complete manual on http://www.scottleslie.net/ostkust/StuartP5Manual.pdf
there is a complete drawing of the engine.
To put in some normal modern lip seals is exactly what I had in mind, did you have to change any diameters in the crankcase to make them fit?
In the drawing I see the taper, they call it a collet, sits against the compression rings, that would not work with a lip seal.
Did you have to fit some kind of tube over the crankshaft between the collet and the bearing to take the pressure ?
Thanks,
Rob |
David Myers
Senior Member
Username: dave_myers
Post Number: 118
Registered: 11-2006
| | Posted on Friday, March 09, 2012 - 06:04 pm: |
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Hi Rob,
A good heavy hit on the outer circumference of the flywheel should shift it. I use a 4 pound hammer. Apply a bit of pressure to the rear of it as well at the same time.
For the seals I had to turn up some sleeves to fit over the Crankshaft for the Seal face to run on. You do not have to modify the crankcase as it is a Standard size. I have looked for my drawings of the sleeve size but cannot find it. From memory the sleeve is about 1/8th inch wall thickness. Go to a Bearing supply and see what sizes they have so you can work to that. The seal is the same as fitted to the ST P6 - P66 and the sleeves are the same as well. That may help.
Cheers,
Dave |
rob.sollart
Member
Username: robsollart
Post Number: 5
Registered: 03-2012
| | Posted on Monday, March 12, 2012 - 02:01 pm: |
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Hi Dave,
Today I made a puller, and together with the good heavy hit with the hammer the flywheel came off.
I then split the crankcase, which was easy, and guess what? there was already lip seal in it.
Only it is completely damaged.
As far as I can see there is no sleeve on the crankshaft, but I am not sure about that yet, because I did not yet get the collet of, it is rusted together with the crankshaft.
Anyway, your information has been very helpfull, the rest is just work, and still a lot of cleaning.
cheers,
rob |
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