What does crank oil seal butt up against?

Mark_smugglers · Jan 31, 2021

I think I’ve just screwed up on disassembly of main bearings and seals from the crankcases of my 1972 750 combat.
On the drive side, i drove the oil seal out from the inside. And then the main bearing inwards from the outside.
And then I realised I may have screwed up.
Is there an insert into the crankcase (from the inside) that the oil seal butts up against ? If so then I think I may have driven some of it outwards with the oil seal.

I'm trying to remember how to post photos and will upload them if I can work out how

L.A.B. · Jan 31, 2021

Mark_smugglers said:
I'm trying to remember how to post photos and will upload them once I've worked out how

As you are not a VIP member then you need to upload the images to a photo hosting website such as https://postimages.org/ then (for postimage) copy and paste the Hotlinks for forums option for each image into your message.

maylar · Jan 31, 2021

The oil seal mounts from the outside and butts against a recess in the case.

Mark_smugglers · Jan 31, 2021

maylar said:
The oil seal mounts from the outside and butts against a recess in the case.

thanks Dave. That's my fear. Is that recess part of the case or part of an insert that I can buy and replace in the case?

Fast Eddie · Jan 31, 2021

Mark_smugglers said:
thanks Dave. That's my fear. Is that recess part of the case or part of an insert that I can buy and replace in the case?

There is no insert.

Fast Eddie · Jan 31, 2021

Some pics from t’internet of what it should look like...

What does crank oil seal butt up against?

Mark_smugglers · Jan 31, 2021

Ok thanks

Time Warp · Jan 31, 2021

The seal will stop at the shoulder.

The seal is hooked out once the cases are separated (on a full strip down)
The cases are heated in the oven bearing down and they will all but fall out if not a light tap on something wooden bearing down.

Time Warp · Jan 31, 2021

If that portion of the case is now broken it would not be the end of the world, you could install the new seal flush at the outside and maybe use some locking agent on the OD of it.

What does crank oil seal butt up against?

Mark_smugglers

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maylar

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Fast Eddie

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Time Warp

.......back to the 70's.

Time Warp

.......back to the 70's.

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