Tail shaft seal and yoke quetsion

[rumblefish360]

Hey guys. I gotta question on one of my weak points. This picture below is a tailshaft to a 727. In my hand is a seal that I think goes onn or in I should say to the tailshaft. The yoke of course slips in and is covered by the dust boot.

Notice theres something of a seal in the tailshaft allready.

Do I need to put that thing in my hand in?

Or can I run without it and be OK.

The inside diameter of the seal in the tailshaft is the same as the one in my hand. I like the dust boot cover and normaly see it this way.

Do I need to remove one for the other?

The one in there now has a lip that sits on the houseing, like it belongs there.

 

[67Dart440GT]

I think that is the same seal just a different one. The 727 I rebuilt had that larger one originally and the rebuild kit came with the seal without the dust boot on it.

 

[rumblefish360]

I like the dust boot style myself. I don't have a yoke on hand to fit into it to see for myself. Thanks for the quick reply. I just need to nkow for sure before I bolt this thing up for daily driver duties.

 

[pishta]

your good. Both work the same, booty looks better..

 

[sr71mopar]

The one in you hand is for harsh conditions like snow or dirt. They tend to squeek when dry.

 

[rumblefish360]

LOL, Indeed it does, Thanks guys.

 

[67Dart440GT]

FYI, I did slide a yoke into mine with the smaller seal and it fits just fine.

 

[fishy68]

Technically the seal without the dust boot has a dust wiper on it too. If you feel inside it there's a lip seal pointing in that controls oil leakage and a lip pointed out that keep out dust. I'm sure the extra boot couldn't hurt anything but if your not in an extreme environment you should be fine without it.

 

[67Dart273]

Yup. Just an aftermarket seal, made differntly than Ma did