WC engineering question - differential

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   So.  Does anyone know the reason there is "what I would consider" a bleeder hole in one of the bolts on each side of the differential on the final drive of the WC? It is drilled through the bolt and reamed larger through the head of the bolt.  This is one of the bolts that holds the thick flat final drive cover to the housing so the hole is between the final drive and the opening for the brakes.  In both of my cases plug solid with oil thickened to grease consistency as expected.  I can' think of any machanical reason.  If you know I am curious as I have to think it did not work as intended.

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Redwood Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 16 Jan 2012 Location: Ontario Points: 631	Post Options Post Reply Quote Redwood Report Post Thanks(0) Quote Reply Topic: WC engineering question - differential Posted: 06 Oct 2015 at 6:28pm
	So. Does anyone know the reason there is "what I would consider" a bleeder hole in one of the bolts on each side of the differential on the final drive of the WC? It is drilled through the bolt and reamed larger through the head of the bolt. This is one of the bolts that holds the thick flat final drive cover to the housing so the hole is between the final drive and the opening for the brakes. In both of my cases plug solid with oil thickened to grease consistency as expected. I can' think of any machanical reason. If you know I am curious as I have to think it did not work as intended.

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JoeM(GA) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Cumming,GA Points: 4823	Post Options Post Reply Quote JoeM(GA) Report Post Thanks(0) Quote Reply Posted: 06 Oct 2015 at 7:43pm
	As the oil in the rear end heats, it creates vapor and pressure that has to escape. If you don't put them back, you risk leakage through axle seals, weeping or dislodging of the pressed in plug on the back and so on. I'd put them back, why risk another leak? It took 60 ish years to plug up, maybe the grand kids will clean them next time after you're gone!
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Redwood Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 16 Jan 2012 Location: Ontario Points: 631	Post Options Post Reply Quote Redwood Report Post Thanks(0) Quote Reply Posted: 06 Oct 2015 at 8:18pm
	Thanks Joe makes sense. They are going back no matter what I just wanted to know why it was there. I suppose your right with the time to plug.