394, Round #2

[Wolverine]

So I popped the flywheel and found the seal in two pieces. Not the rubber, but the steel outer housing of the seal. Would this be due to incorrect assembly?? Like maybe the seal was not seated deep enough and the flywheel hub was rubbing on it?? This was my first rebuild that went this deep and I'm fully prepared to accept a mistake on my part.

The more I look at this the more I think the seal wasn't seated quite deep enough and the flywheel was rubbing it.

And I will be putting new bearings in along with the seals. It's not my saw and I want to make sure it's good. I still don't like the looks of that PTO side bearing. Looks like it got pretty hot

View attachment 153333

Daggum! That seal is,, gone! Props to the operator for not roaching a p/c with that much of a leak?
Dug up an old pic of when I did seals in mine and zoomed in. I'm going to guess yours wasn't in far enough (I'm no authority btw).



EDIT: After looking more, I can't really tell where the outter rim of your seal is, so maybe I'm wrong.

 

[redline4]

I have seen seals separate like that if whatever was used to drive them in was smaller than the o.d. of the seal and it kind of folded in on itself when installed.
A guy at work was notorious for that on front axle seals in trucks. Took me a while to figure out why I was replacing seals again 6 months after he did.

 

[MustangMike]

I have seen seals separate like that if whatever was used to drive them in was smaller than the o.d. of the seal

That makes a lot of sense! I usually try to make sure the socket I'm driving the seal in with is a bit larger than the seal just to ensure I don't drive it in too deep. However, this is good to know, I will keep it in mind!

Things you just don't think of that are just good to know, THANKS!

 

[redline4]

The difficult ones are recessed seals.
Whatever you use needs to fit into the recess, but still ride on outer edge of seal.

I keep a handful of cheap kung-pow sockets around in case I need to grind down the o.d. to make improvised seal drivers.

 

[Fruecrue]

I thought you were supposed to hit seals with a lead filled snowshoe.

 

[redline4]

Dave, driving a seal and clubbing a seal are 2 totally different things.
Fyi.

 

[decableguy2000]

You asked.

 

[Fruecrue]

Dave, driving a seal and clubbing a seal are 2 totally different things.
Fyi.

Carry on then.

 

[RIDE-RED 350r]

You asked.

View attachment 153368

Thanks for that!!

 

[RIDE-RED 350r]

Well, parts are ordered. New seals, bearings and gaskets and this 394 should be back to work soon. I know the bearings are most likely fine to keep running. But, not my saw so I'm doing everything I can to make this right since I believe this to be a mistake on my part.

 

[beaglebriar]

I probably have a case around here if you need a measurement for seal depth.

 

[beaglebriar]

Well chit...shoulda looked through the thread first. Lol

 

[PA Dan]

Well chit...shoulda looked through the thread first. Lol

Always late to the party...[emoji6]

 

[beaglebriar]

Always late to the party...[emoji6]

Troof....

 

[Dub11]

Dave, driving a seal and clubbing a seal are 2 totally different things.
Fyi.

 

[dustinwilt68]

I have been building mostly 394/395 lately, I generally try and look at the depth before removing the old seals, they are really a pleasure to work on honestly, I bet this one lives a long time after you get her back together Joe.

 

[RIDE-RED 350r]

Hopefully....lessons learned.

 

[XP_Slinger]

I have been building mostly 394/395 lately, I generally try and look at the depth before removing the old seals, they are really a pleasure to work on honestly, I bet this one lives a long time after you get her back together Joe.

They’re fun to work on because they’re essentially a 2-series imho

 

[dustinwilt68]

Yes I agree, simplicity at it's finest!