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Separating A10 crankcases
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Topic: Separating A10 crankcases (Read 891 times)
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
Karma: 2
Separating A10 crankcases
«
on:
18.11. 2015 19:47 »
I hope you can help me yet again ! Has anyone got any tips on separating the crankcase halves ( I think it's old joint paste holding them ) And I can't shift the woodruff key on the crankshaft/ oil pump gear.
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bsa-bill
Wise & Enlightened
Join Date: Mar 2006
Posts: 5720
Karma: 66
Re: Separating A10 crankcases
«
Reply #1 on:
18.11. 2015 22:29 »
I'll state the common cause of crankcases not parting, forgive me if it is not this but we've probably all done it - forgot the internal nut (oft referred to as the infernal nut )
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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
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
Karma: 2
Re: Separating A10 crankcases
«
Reply #2 on:
18.11. 2015 23:32 »
Thanks Bill, but that's off, I will try and remove the studs in case they have corroded in the alloy cases.
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Topdad
bob hebdon
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Join Date: May 2011
Posts: 2598
Karma: 36
l
Re: Separating A10 crankcases
«
Reply #3 on:
19.11. 2015 11:21 »
no disrepects also But I've seen sump plates put up a hell of a fight when splitting cases
seriously perhaps either or both main bearings . The timing side ,I seem to remember gets a ridge at its end and the drive side can just be stubborn . Sure I've been able to apply reasonable leverage from the inside to start the process . best of luck, Bob
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" rules are made for the guidance of wise men and the blind obediance of fools"
United Kingdom
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
Karma: 2
Re: Separating A10 crankcases
«
Reply #4 on:
20.11. 2015 08:27 »
Thanks Bob, I've only applied hand pressure so far, but wanted to check it out with you guys first in-case you had some tips, so I will apply some leverage from the inside next ( If I can shift that stubborn woodruff key ) ,Ivor.
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Rocket Racer
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Join Date: Jun 2009
Posts: 1670
Karma: 17
A kiwi with a racing A10 rig and too many projects
Re: Separating A10 crankcases
«
Reply #5 on:
21.11. 2015 23:17 »
as long as ALL the bolts are undone, a few discreet taps with a rubber mallet or a mallet will normally get them apart.
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A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
New Zealand
bsa-bill
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Join Date: Mar 2006
Posts: 5720
Karma: 66
Re: Separating A10 crankcases
«
Reply #6 on:
22.11. 2015 10:44 »
Quote
discreet taps
Ah now, pleasant memory's of being indiscreetly tapped up
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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
Guy Wilson
Valued Contributor
Join Date: Feb 2011
Posts: 309
Karma: 2
Re: Separating A10 crankcases
«
Reply #7 on:
23.11. 2015 08:15 »
I've recently split two crankcases without too much resistance. Apart from doing an idiot test (which I have to do regularly) and re checking all the securing bolts are removed, its probably just the passage of time and a bit of surface rust/gasket holding it together. I A few taps with a rubber mallet should be enough.
Guy
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Kenya
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
Karma: 2
Re: Separating A10 crankcases
«
Reply #8 on:
23.11. 2015 19:49 »
Thanks Guy,
I separated them using two rubber faced sash clamps in reverse, top and bottom. It was the gasket sealant mainly around the studs doing the holding.
And I was being over cautious because I've worked on engines after someone's used a hammer and chisel before.
Thanks to everyone else as well.
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BSA_54A10
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Join Date: May 2008
Posts: 2544
Karma: 37
Re: Separating A10 crankcases
«
Reply #9 on:
16.12. 2015 09:16 »
A trick that has worked well for me is supporting the "top" half of the case by the throat and sump.
Pop this in the oven with a nice lump of roast.
After a while the bottom 1/2 will drop offdue to the heat & weight of the crank.
Flip it over and allow the crank to drop out of the other side.
No wacking required.
Enjoy the roast.
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Bike Beesa
Trevor
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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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A7 & A10 Engine
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Separating A10 crankcases