What am I forgetting?

[bikemadinspain]

Hi all, I am still havin problems with stripping the engine down, I have removed all gear box blots and all inner casing bolts, I have tried tapping with a mallet, heat and cold and still  no joy, could u please look at the attached pics and c if I am sill missing something.

 I am trying to add more pics but they are apparently to big, I will try and add more pics as a reply later, cheers

[a10 gf]

offtopic

as I have no idea what its on about

That's why the 600k restriction is in place  to avoid the attempts at posting pictures that are 4 meters wide and 3 meters high, and kills the server or the users' internet line when someone tries to view them. Do some research about resize of pictures, or set your camera to take picture in an appropriate size for on-screen use, try something like 800 x 600. btw, resizing is just a few clicks in any photo program (f.ex. using the recommended Photofiltre). Alt, test out some photo hosting website, they provide automatic tools to make photos useable for forums & viewing on-screen.

[a10 gf]

About splitting (after having made sure all retaining bolts etc are out) I use a blade and gently tap it in (a very small depth) all around. And remember, it's not for cutting into the casting, but for separating!


Edit: It's a very small hammer actually (picture makes it look dramatic :O) and used for very light and precise taps.

[bsa-bill]

I'm not familiar with the A10s with bolt on gearbox's but looking at your pics I would say the gearbox has to come off before you can split the engine, someone here will know for sure

[a10 gf]

I am assuming you've removed the gearbox !? If not, see picture.

[bikemadinspain]

I have unbolted the two bolts and two nuts retaining the gearbox and the gearbox is loose, however, will not come away due to the shaft still being through the outer casing. I will try the blade beween the gap in the morning. Many thanks 

[muskrat]

 OK I can see your prob. The two studs at the bottom must come out (mine has bolts in all four). With the gear box still intact it slides off to the right. If you can't get the studs out you will need to pull the mainshaft out of the gear box to take it off the studs. (remove the studs).
Cheers

[muskrat]

A10GF, a CLAW hammer ??? spose better than a brick. LOL

[bikerbob]

Just been reading Roy Bacon's book on the BSA Twins and according to him before you can split the crankcases the gearbox has to be removed first. Never had semi unit twin but looking at the first photo will that steel collar around the gearbox main shaft not come off so giving you clearance to remove the gearbox.

[trevinoz]

It's a rivetted on seal retainer, Bob.
Gearbox has to come off.

[a10 gf]

muskrat wrote

a CLAW hammer

It's a very small hammer, picture makes it look out of proportion.
But anything goes, as long as it is used with some wit and as recommended:

...gently tap...

[bsa-bill]

 a small tap with a large hammer is better than many full welts with a small one - Confucius  (well no - I lie it was an old blacksmith I once knew)

[chaterlea25]

Hi,
NO BLADES or HAMMERS REQUIRED 


Regards
John

[a10 gf]

NO BLADES or HAMMERS REQUIRED

many opinions on this, if some items comes apart easily, then of course no need, if it's old gasket material or it's corroded or whatever, I use the thin blade method to gently break the bond with a blade and few light taps all around. Zero damage to parts, zero problems, always works fine.

Seeing what some have done to mating surfaces using screwdrivers, knives etc + brute force... the blade method does no damage and leaves no traces. Of course, use patience and gentle taps, not force. And I guess someone may make a mess of it if not careful and patient.

[bsa-bill]

yep I use a blade too, if inserted on a curve mid blade it's a safe method, however for crankcases if barrels are off then clamps ( top and bottom (sump)) of the type you can reverse are good. just a wee bit of pressure and a tap and they split