V ring seals on prop shaft

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Donald A
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V ring seals on prop shaft

Post by Donald A »

Is this the right way round - with the lip towards the gear box?
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Charles uk
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Re: V ring seals on prop shaft

Post by Charles uk »

If you give us the serial number Donald,we will know which gearbox your talking about.

Don't really need the number just the alphabetic characters.
Make it idiot proof and someone will make a better idiot.
Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

It's been separated from it's engine - but it is a 10/21 featherweight box without seals, in good condition.
I have taken what you said on a previous thread ie tried to get the prop shaft so that it has no play up and down and almost none ( I suspect it's about 10 thou) fore and aft - and a new what the spares book calls a rubber oil seal washer - and D140 Castrol gear oil - but it still (very slightly) leaks
One of my others is an EFPC which I've had from new and it's box has never leaked, which I suspect has given me an unrealistic expectation!
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Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

For some weird reason the photo comes back with unrecognised file - or similar!
D
Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

Try again
At last - seems to have worked
Obtained from wych bearings, as per thread some time ago
D
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Charles uk
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Re: V ring seals on prop shaft

Post by Charles uk »

I can't see what your trying to achieve, where is your oil seal going to go.
Make it idiot proof and someone will make a better idiot.
Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

As I understand the previous thread from the guy who suggested it, it replaces the Sheridan rubber seal washer altogether - and supposedly acts more as a seal rather than merely a grit barrier
It’s on there in the photo just to demonstrate its shape - the photo here looks a bit different from the photo in the thread, so I wonder if it’s the same. I have put it with the lip facing towards the gear box, which is presumably the right direction?
Also, I understand that it’s meant to rotate with the prop shaft, hence it’s tight fit. Part V12A is supposed to be for shafts 11.5-12.5 and the shaft is12.67 mm so perhaps it’s a bit tight but that’s what was suggested
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Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

The original post was by Gannet on Sep 19 2018 which is on sheet/page 5 of these threads
I hope I have not misread it!!
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Charles uk
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Re: V ring seals on prop shaft

Post by Charles uk »

So the seal on your pic is where it's going just a little lower.
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Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

No it’s instead of the existing British seagull rubber seal/wash ie I would take off the brass collar and put the new seal behind it
The new ring seal is smaller in its outer diameter than the BS one - does this matter?
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Charles uk
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Re: V ring seals on prop shaft

Post by Charles uk »

No it's probably going to rotate with the shaft against the brim of the top hat shaped prop shaft phosphor bronze bearing.

If your loosing SAE 140 gear oil from the prop shaft bush it's normally a sign that there is wear on the prop shaft or the bush or both, when these boxes were new, they lost very little oil.

The models with boxes designed for oil seals were & are very good when they have good seals on the prop shaft & pinion.

I have never tried Gannet's idea, but I have renewed prop shafts & their bushes & pinion bushes, a high cost fix, I've also tried changing the gear oil grade, a much cheaper potential fix, I think I've tried 220, 350 & 480.

480 is the viscosity I use in the early grease nipple boxes.

Raising the viscosity of the gear oil either with a heavier grade cocktail or just a few squirts of cheap grease that will mix with SAE 140 might well minimise your oil leakage problem.
Make it idiot proof and someone will make a better idiot.
Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

Thanks for that - very helpful - I’ll give it a try and see how it goes
I didn’t realise one could get 220,350 and 480 - which of these still pour? And who sells them - I haven’t seen them on web sites
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Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

I suppose I should have asked that question more intelligently - which of the heavier oils stay on the teeth of the gears whilst in use, and therefore still lubricate them?
And does it matter what GL number they have? GL4 seems to be the only suitable grade around commercially these days
D
Donald A
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Re: V ring seals on prop shaft

Post by Donald A »

I am cancelling my previous two entries, quite simply because buying any heavier oil I have discovered is going to cost about £17 for 1 litre -having already bought sae 140 1 litre, so it’s all getting a bit out of control and counter productive
Thank you again for explaining it - I shall try the ring seal and put some grease (which I already have several tins of..) into the existing 140

Stay safe - incidentally (off topic as charlesp would have said) have you seen the dr Levitan article (a&e specialist in New Hampshire) about spotting patients coming into a&e for something else and him spotting that they had covid and dangerously low blood hypoxia but not realising this - he then says (but you need to read the real article) that the solution is affordable and realistic for the general population, by way of buying a pulse oximeter from the local pharmacy - or in our case in lockdown from the web - for between £30 and £50 and without a doctors prescription - he said every house should have one, as they do a thermometer
The level should be between 94 and 100 per cent - his a&e patients were down to 50-60% and did not know it - so by the time they were showing overt symptoms, they were in real trouble, because internal organs were beginning to shut down

He called this silent hypoxia
I found this riveting - it had the ring of truth to it
I have received one and am about to try it....
All the best
Donald
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Charles uk
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Re: V ring seals on prop shaft

Post by Charles uk »

I got mine from heavy industrial machine service engineers, it seemed to arrive in milk bottles, they all seem to pour & they get it in 200 litre drums.

All Seagull lower units in the 30's & 40's had grease/oil nipples & no oil filler cap, I can't remember what the recommended lubricant was but you'll find it on here, CharlesP was researching that area.
Make it idiot proof and someone will make a better idiot.
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