Author Topic: Problems Removing A10 Primary Chaincase Inner  (Read 9711 times)

Offline trevinoz

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #30 on: 07.02. 2010 20:40 »
Hubie,
             The clutch centre hub should be a close fit to the sliding plate with almost no gap around it.
What clutch are you running?
If a six spring, there should be scrolled oil slinger pressed onto the gearbox end of the hub.
If a four spring, the slinger is machined into the hub.
Trev.

Offline brackenfel

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #31 on: 07.02. 2010 20:46 »
Hi Bill,
Thanks for the advice about the breather mod.. Mine has engine / frame numbers from '61 , registered May '62 so I'm afraid it's probably a different one.
Got to get some gaskets, bolts (the long ones for the chaincase / FERC front are bent!!) & start putting it all back together..

Adrian
1961 A10 650 Golden Flash - Blue
1954 BSA B33
Velocette Viper
Laverda 750 SF1
Kawasaki W650
Buell XB9S
Ariel 350NH & Matchless G3LS in bits...

Offline Hubie

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #32 on: 08.02. 2010 03:51 »
It appears then that the oil slinger is missing.  The bike is running a RGS clutch (4 spring) with the clutch hup doubling as the bearing surface for the rollers on the clutch basket.  If I can't find something to do the job, I will make something.

Cheers]

Hubie.
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Online orabanda

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #33 on: 08.02. 2010 04:11 »
Contact Colin Tie (Perth WA); he makes and  / or modifies the backing plate and installs a seaql. It works much better.

9295 6875





Richard

Online orabanda

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #34 on: 08.02. 2010 04:15 »
This is how I added a pipe tp the breather hole, to prevent the crankcase oil / air making a mess at the rear of the crankcase.



Mind you, the original arrangement ensures that the chain is always lubricated!
Richard

Offline Hubie

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #35 on: 08.02. 2010 05:13 »
Thanks a million for that mate,

Now I know exactly what I need to get done.  Those picutres are a big help.

Cheers

Hubie.
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Online bsa-bill

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #36 on: 08.02. 2010 11:01 »
I recall a trader (sorry can't remember who - was on Ebay) stating that the hub adaptor he was selling had the scroll the correct way unlike some others on the market.
So there are hub adaptors out there that are going to scroll oil out instead of in.

All the best - Bill
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline brackenfel

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #37 on: 08.02. 2010 14:41 »
Hi Richard,
Very neat, many thanks for the pics...

Adrian
1961 A10 650 Golden Flash - Blue
1954 BSA B33
Velocette Viper
Laverda 750 SF1
Kawasaki W650
Buell XB9S
Ariel 350NH & Matchless G3LS in bits...

Offline trevinoz

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #38 on: 08.02. 2010 20:28 »
Hubie,
              The scrolled slinger should be a machined part of the hub, unlike the six spring type which has a pressed on part.

Richard,
              I like the seal but I guess the hub has to be machined off to accommodate it. Correct?
  Trev.
           

Online orabanda

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #39 on: 08.02. 2010 23:04 »
Trev,
Correct!

Online Brian

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #40 on: 08.02. 2010 23:48 »
This is a mod I have been thinking about for some time and its good to see how someone else has done it. I assume he has a bronze bush the other side of the seal.

My thought was to leave the clutch hub as it is except to machine the scroll off and use a larger seal to run on that surface, that would leave more room between the hub and gearbox sprocket to run the bush.

Must pull mine apart sometime and put some more thought into it.

Online orabanda

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #41 on: 09.02. 2010 00:23 »
Brian,
No bronze bush; it's a seal carrier.

Online Brian

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #42 on: 09.02. 2010 00:32 »
Hmmmmm, so if there is no bush what stops the seal from distorting when you adjust the primary chain. There would have to be something to pull the plate back when you adjust the chain. If the seal carrier runs on the shaft to do this then thats steel on steel, would wear a groove in the shaft.

I would love to see a picture of the other side of the plate.

Offline trevinoz

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #43 on: 09.02. 2010 02:14 »
Brian,
            The plate is a sliding fit because the securing bolts have a shoulder which stops the plate locking solid to the inner case.
With the original set-up the bushed section of the plate finds its own centre when the gearbox is adjusted.
I suppose a garter seal would do the same.
Trev.

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Re: Problems Removing A10 Primary Chaincase Inner
« Reply #44 on: 09.02. 2010 02:35 »
Trev described it well.
The plate will slide, and the seal retains its correct shape