How to remove main bearing?

[simplex1957]

I need a little help on the best way to get the main bearing out of the case.
I have heated the case and sprayed loctite freeze on the bearing with no luck.
Any other ideas?

[simplex1957]

Never mind, a bearing puller for a late model Harley wheel works like a top.

[simplex1957]

I do have another ?  The hole at the bottom of the intake that that goes to the bottom
of the case, outside of the case, what is it for?

[pd]

Drainage would be my best guess . But

I had the same question .

There is suppose to be a 'wad' of felt at the bottom of that hole . The hole drains down between the motor mounts .

How much heat did you use trying to remove that main bearing ?

When I replaced my main it simply fell out and the new one dropped in after heating to 400°+ for about 20 minutes .

Pete .

[simplex1957]

Yes there was a strip of felt, about an inch long at the top of the hole. I just can't figure out
what in the world it could be for.

I heated the case on a hotplate to about 250 degrees, an then sprayed locktite freeze on the
bearing, nothing. Even with the puller it was tight.

[Mike Sal]

Be sure to heat the case before you replace the bearings.  That case isn't too strong & can be damaged easily trying to cold press it.  You just didn't have it hot enough.
Mike Sal

[admin]

Heed the warnings and heat the case to 400-425 for 15 minutes or so.  The bearings should just about fall out.  When reinstalling new bearings, I like to heat he case again, and while it is heating, I throw the bearings in the freezer.  They just slide right in and then I tap it lightly with a block of wood and hammer to ensure they are seated.

[pd]

I heated my case in a small table top grill . Worked just fine .

[simplexguy]

I have found over the years of working with simplex engines that the hole with the felt in it is for fuel drainage if it gets super flooded. When I rebuild them now I close that hole with a dab of JB Weld. This makes a little more vacuum in the crankcase and seems to start and idle a bit easier. Now if you do happen to really flood the engine, you will have a little more work drying it out, but I think the tradeoff is worth it. Just my opinion.

[simplex1957]

That was my first thought, but if the engine is flooded most all the fuel will be in the bottom end and it doesn't seem that the drain hole would do any good.

[Ricks]

Wayne claims the same thing about the drain hole.  He also says to just put a little JB weld in it.  I have done both ways and have seen no difference.

[simplex1957]

I have got my case about ready, just waiting on my bearings that I ordered today. I think I will
start another post about the rebuild next week. I've done a few different things that may be
interesting.  Hope everyone has a nice Thanksgiving.  Randal

[pd]

" Hope everyone has a nice Thanksgiving.  Randal"

Thanks , Randal .

The same to you and yours .

Pete .

[Sonrisers]

I would deffinately like to see the thread on the rebuild from the tear down to the finish, all the details please, happy holidays.

[Gramps]

I would like to see that also as I will be rebulding one soon.
Best wishes to all for a happy Thanksgiving!