Function of Thrust Washers and Flat Bearing?

5

58CorrySuburban

Seaman
Joined
Sep 28, 2008
Messages
73
The section of the lower unit that houses the thrust washers and flat bearing is chewed up from a previously failed flat bearing.

Since the needle bearing and the pinion bearing both serve to center the pinion gear, wouldn't that also center the washers and flat bearing away from the housing walls anyway?

This is pretty far from the title of the last post so I though I should start a new thread.

Hoping for good news,
-Josh
 
F

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Re: Function of Thrust Washers and Flat Bearing?

So how is the cavity where the race seats flat-wise? If that is ok and it goes in the cavity, not to worry.

The lower race has a smaller ID hole and centers on and turns with the pinion shaft. The upper one has a larger ID and centers in the housing and does not rotate...at least it doesn't have to.
 
5

58CorrySuburban

Seaman
Joined
Sep 28, 2008
Messages
73
Re: Function of Thrust Washers and Flat Bearing?

Yea, It looks like the section of the housing (between the two races) that was involved with the flat bearing has been widened (I'm guessing from the loose rollers stuck/grinding between the two races). Of course the surface between the two races is a bit knotched-up from grinding out the rollers.

I noticed that the flat bearing is a bit smaller in diameter than either race, and therefore wouldn't come in contact with any damaged surfaces.

I still don't understand what force (vertically) is being managed by this set-up?

I understand that the thrust from the prop shaft pushes everything a bit (horizontaly), but isn't this force dealt with between the pinion bearing and needle bearing?
 
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