Author Topic: Dynamo leak on RGS-R  (Read 442 times)

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DAVE BRADY

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Re: Dynamo leak on RGS-R
« Reply #15 on: 16 March, 2020, 18:42:08 »
Hi Maurice,

Have you recently replaced the idler gear bushes?  They both look identical but I believe they have the oil groove going in opposite ways.  The outer one is spiralled to take oil back in to the engine. If an inner bush is put in the outer position it will push oil in to the dynamo drive area.

Dave.

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #16 on: 16 March, 2020, 20:09:24 »
Hi Dave that is a really good Question as I did not put the engine together so that's one thing I am not sure about so the next time I get a chance I will strip the two cases and look at that.....   

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #17 on: 21 March, 2020, 22:56:18 »
Hi,


here is the update as of today I took off the outer and inner cases and as i took the outer case off it there was quite a lot of oil in the Dynamo compartment so on removing the larger wheel and taking off the belt I then took off the inner case and had a look at the bush which was the right way round as the spiral was going to the left inward and as the idler rotate anti clockwise that should be taken the oil back into the engine, so I took the bush out as it was a bit of play on the shaft.....as I have pri ordered a new one which should be on its way from D/F next week so I can check if there is a lot of ware in the bush or Not.....so we will see if it has or not............if not were do I go next ?

Cheers Maurice

DAVE BRADY

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Re: Dynamo leak on RGS-R
« Reply #18 on: 22 March, 2020, 07:52:40 »
Hi Maurice,

This must be a pain in the neck for you.  Some basic ideas that may or may not help.
450 miles may not be enough for complete bedding in of the rings so possibly a contribution there.
Is there any oil coming from the timed breather - indicating a crankcase pressure issue -rings not yet run in, breather not working properly- can you feel pressure coming out of the breather hole?
Are the timing cover gaskets sealing properly - especially the outer one which is quite narrow towards the bottom of the chain run - the face it sits on is also quite narrow.
If your engine still has the timing side bush you could try running it for a minute with the timing cover off - if every thing is clean to start with you may see if anything is getting through the bush in question.  Beware though it can get a bit oily.
I share your frustration.

Dave.

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #19 on: 23 March, 2020, 00:12:56 »
Hi Dave

Yes it is a pain as had them cases off now about 4 times :(

well there is no oil at all coming out of the breather....and yes you can feel a small amount of pressure coming out but not a lot, and as far as I know all gaskets seem to be sealing ok.....I have always used wellseal but this time I am going to use a  9911 RTV Silicone sealant Gasket compound as well to make sure they seal good,

Thank for your advice dave been a great help, well when I get the bush and the new gaskets come I will try it all out and see how it go`s and let you know

That's if I don't have to stay in as I could be one of the ones that get the Letter to stay in for 12 weeks............I would go Nut`s I think if I could not get out on my Bike`s :-(   

TTJOHN

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Re: Dynamo leak on RGS-R
« Reply #20 on: 23 March, 2020, 09:20:51 »
Should have bought a kit from Dynamo reg ltd, in Fareham, Hant's, Mikes belt conversions, 15 mm toothed belt, doesn't need lubrication, they are very highly recommended, I have them on all of my twins, very efficient.

My2p TTJohn

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #21 on: 23 March, 2020, 20:05:02 »
Hi TTjohn, I think you have Not looking at the whole thing..it`s not that is is a SRM belt driven Dynamo conversion it`s the fact that the Dynamo compartment is getting and a oil build up as I did not put loads of Grease in there this time anyway, but oil is filling up that part of the compartment properly down to oil coming through the cam pinion bush.............well we shell see if it is due to ware on the outer bush letting the oil through it.............that's if I get it together and able to take her out to try with all what is going on at the moment if you know what I mean............ Keep safe all of you.

Cheers Maurice   

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #22 on: 26 March, 2020, 22:38:25 »
Hi, well as of today I have her back Together with a new bush fitted from D/F along with new Gaskets Etc, the thing is do anyone know what way the scroll run`s on the bush as the one what was in there looking from the outer case side starts from the left inwards and the New one starts from the right inwards........so have I found the reason Now or Not why it was pressurising and putting oil into the Dynamo compartment.........well I wont Know I don`t think now until we can get back on the road with whats going on at the moment and I can get out and try her, I have had it running up for about 10 mins and nothing yet fingers crossed.......but as I say do anyone know of the way the scroll go`s as the new one do go the other way than the one what was in there ?

Cheers Maurice

Stay safe everyone.....oh and stay in doors to help us all to carry on riding in the future .............. unless you have to go out that is 

JulianS

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Re: Dynamo leak on RGS-R
« Reply #23 on: 27 March, 2020, 10:31:57 »
These photos may help.

The first from an old as found inner cover.

The second fitted around 12 years ago and recently replaced when I fitted a new idler spindle.

Note the difference in scroll depth.

The spindle needs to be a good fit for the scroll to be really effective and you do need the cork or felt seal between the bush and back of the large dynamo sprocket. Neither will fully succeed if the oil pressure in the engine is too high.

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #24 on: 27 March, 2020, 13:10:31 »
Thanks Julians

they have both got the Scroll`s going the same way as the new one I have just fitted and they look to have the same Depth as the new one too, as for the one I replaced it had a very shallow Scroll and it was going the other way.....so I will keep my fingers crossed that it might be ok Now............we will see, and I will keep everyone updated as soon as we can go out to try things......back on the road again :-)

Cheers Maurice

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #25 on: 05 April, 2020, 22:48:25 »
Hi everyone

well here is an update, yesterday I had to go out to the Pharmacy to pick up some meds so I thought are here is a chance to try out the BSA........ended up doing about 20 miles so the first thing was to check everything out :-(

well on looking at the underside and the front of the Dynamo I could see a trickle of oil coming down from the back of the Dynamo and running down under the sump so guess what that means it is still leaking oil into the Dynamo compartment..........
so Now I am at my wits end as I have done everything I can think of so lost for words Now...............other that a Nightmare :-(

Maurice   

DAVE BRADY

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Re: Dynamo leak on RGS-R
« Reply #26 on: 06 April, 2020, 08:12:09 »
Hi Maurice,

Sorry to hear you are still having this problem.  So a bit of sideways thinking.  All the possible parts, bush, cork washer and spindle  are good fit.
Is there any damage to the centre boss where one of the screws goes?  Sometimes a slack chain will damage this by scoring grooves.  It is possible that these go through to the screw and oil could be finding its way through especially if there is a lot of crankcase pressure.  Also, as mentioned by Julian, too much crankcase pressure could overcome the seal of the cork washer.
If there is too much crankcase pressure it is usually caused by failure of the piston rings to seal or the timed breather is not functioning or is blocked/partially blocked.
Check the breather 'top hat' on the end of the cam - there should be absolutely no play.  See if you can feel the pressure releasing from the breather hole at the back of the crankcase.   

Dave.

mo goldie

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Re: Dynamo leak on RGS-R
« Reply #27 on: 06 April, 2020, 21:21:22 »
Hi Dave

well when I got the kit it came with a felt sealing washer behind the large belt pulley wheel and I thought about putting on the cork one on which I have got a new one from D/F but it would not fit behind the pulley wheel as it is to thick and I did not want to force the pulley on to it, the Breather yes is a very good fit with No play and there is very little pressure that I can feel coming out of the crankcase breather, I did check the inner case for any damage that the chain might have done but there was only one bit which had been hit by the chain which was not bad at all so everything seems to be ok. it make me wonder if I should have put that cork washer on but I think as it would have been hard up against the pulley and the back of the pulley wheel I thought it might have got damaged as soon as I started the engine...but how knows.......Maybe I might take the outer case off yet again and try putting the cock one on and give it a try.....what else to do I can`t think of anything......oh the bike has now covered 490 miles so I would think them piston rings are getting a bit bedded in and still staying under the 4,000 rev range.

Thanks maurice