I screwed up!!! SPIII Main bearing flange broke

[tris]

BRAVO plus you got a M11 tap.

I've never seen a M11 anything given that its not an ISO preferred size

[93spada]

BRAVO plus you got a M11 tap.

I've never seen a M11 anything given that its not an ISO preferred size

Sorry, I never got them. way too specialized for the Guzzi tool box.

[Chuck in Indiana]

I'd just have used some 'Merican tap. I have boxes full of em..

[John A]

WOW!!!!!!!

Congrats on finally getting it out!!!

Now make sure that you get the CORRECT size replacement!! Don't ask how I know but suffice it to say a seizure at 70mph is not fun

Tom

I remember the Tech Rep for Guzzi, Dave H. ,saying that when that rear main locks up, it can get exciting for it locks up fast and tight. Crud or wrong size or oil starvation so heed Toms advice 

[Kiwi_Roy]

This one was tight ! I used boat shackles in flange webs
Yes my claret, leaked a bit doing this,
I relieved the hole when it finally came out

That must be putting a tremendous strain on the front main bearing no?
Some wooden blocks behind the flywheel outside the bearing flange might have allowed you to wind it out using the 6 flywheel bolts with no force to the front.
I may be missing something, was it stuck on the shaft or stuck in the crank-case?

[jacksonracingcomau]

Same as Op and the others
Stuck in case, galled badly
Like many others I've pulled loads of these out, never broke one before, usually do it with pry bars, this one wasn't coming with pry bars or puller on tapped threads (that's what broke it)

Chain around puller was simple and quick, I used shackles cos they were lying on my bench, bolts through chain would work
Actually quickest way of doing it, took a few seconds once jigged up, pulling from 4 places, if I ever get another stuck one, will do this first before breaking flange, the four holes will do no harm.

[Kiwi_Roy]

Fair enough, it's the sheer size of the puller that looks brutal but the shackles obviously wont allow much force to be used.
 

[jacksonracingcomau]

Fair enough, it's the sheer size of the puller that looks brutal but the shackles obviously wont allow much force to be used.

Read the whole thread Roy, OP cooked his to get it out. Stuck is stuck, others had to dismantle engine and put whole thing in a press, that's serious ! Puller is big but same principle as Guzzi factory one. My trick was not so much about force but pulling from 4 places that won't break (or didn't this time)
Didn't even need to change oil, was running that night.