Timing case seals

[Jeff Balazs]

Hi Guy's;

Does anyone have photos or an exploded view of the timing case sealing arrangement? I bought a Felpro gasket set that has a large diameter, thick felt seal which I believe is a dust seal for the timing case. It seems to fit over the hub on the main pulley. When I disassembled mine it did not have one of these fitted. Not sure it belongs there but I can't find another use for it. The manual I have is pretty weak on this sort of detail.

Thanks Jeff

[Don Coatney]

This might or might not help.

[Jeff Balazs]

Thanks Don;

I wondered about this. When I disassembled mine this was not in place.

Do these last very long ? It seems like they would rub quite a bit but perhaps I am missing something.

Thanks, Jeff

[Dodgeb4ya]

The felt seal is only used with the cupped type of damper/hub assembly. The felt seats into a cupped recess. Don's picture shows this.

Bob

[Jeff Balazs]

Thank you DodgeB4ya;

That clarifies things quite a bit. My hub does not have a dampener or this recess.

There are quite a few variations like this in these trucks aren't there?

I seem to run into one every other time I work on this truck. Quite a bit of them are either not too well explained in the manual or just omitted.

I ran into one a couple weeks back when working on my E-brake. My 52 3/4 ton has a fluid drive 4 speed. I found out that in order to remove the e-brake lining for renewal you actually have to unbolt and remove a frame cross member. Not a big deal.....but in looking through photos something that is not required on some of the other models.

Thanks again for clearing this up.

Jeff

[Merle Coggins]

The Fluid Drive / 4 speed combo creates that extra length that puts the park brake drum right next to the cross member. Each piece is extra long compared to a normal clutch or 3 speed. Combine them together and it gets quite long. My truck is the same way.

Merle

[Jeff Balazs]

Merle;

I knew I was not the only one who had ran into this.

Relined item should be back soon. Then I get to put it all back together. Again!

I decided to go the prudent route and remove the timing case and oil pan before running this engine. I am glad I did. Too much slack in the chain and a fair bit of sludge in the oil pan and valve galleries. Good news was no metal bits.

So now it is all clean and painted and just about ready to reassemble.

Looks to me to have been running rich and probably picking up too much oil from the improperly plumbed PCV system that was on it. I guess that is better than running too lean.

Jeff