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Greenbelt

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Joined: 11/01/2009
Location: United States
Posts: 566

Posted: 05:26am 07 Jan 2010

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OZTULES SAYS;

"Here is the inner of the hub. 80% of it is hollowed out. You can see the ribs there. These keep the oil from the shaft rotating around the inside for reasons unknown. I suppose it does keep oil around which is good."

Apparently The plug is a drain plug.
Perhaps this will clear up some of the mystery.
an Interesting read.Oiling system

Time has proven that I am blind to the Obvious, some of the above may be True?

MacGyver

Guru

Joined: 12/05/2009
Location: United States
Posts: 1329

Posted: 05:49am 07 Jan 2010

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I think what we're talking about is that little stand-alone plug on the piece to the left. Are we all on the same page?

Nothing difficult is ever easy!
Perhaps better stated in the words of Morgan Freeman,
"Where there is no struggle, there is no progress!"
Copeville, Texas

GWatPE

Senior Member

Joined: 01/09/2006
Location: Australia
Posts: 2127

Posted: 06:24am 07 Jan 2010

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I think oztules has summed it up.

From a mechanical aspect, the bung is most likely there to drain water from the self oiling mechanism without taking the machine apart.

The main rotor is connected to the pumping mechanism with a thin shaft. Oil that weeps out of the pumping crank case along the drive shaft provides lubrication to the main journal. There would be a lot of force from the fan that would be translated to the large journal during furling. The combination of 2 bearing systems provides low wind startup and high wind survivability.

The clearance between the fan rotor casting and the crank case casting should confirm this purpose.

Still good to see so much documentation is still around.

Gordon.

become more energy aware

oztules

Guru

Joined: 26/07/2007
Location: Australia
Posts: 1686

Posted: 06:35am 07 Jan 2010

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Yes.
That is a slightly different pump motor, but is essentially the same. It is interesting that they have the bung as well.

In the last photo, there is the oil outlet/inlet (mine is outlet only) with weep indent. There is a second indent just in front of that. That one is used to hold the bearing in place. If it is original, the bearing (white steel) is cast in situ, and line bored, so the white steel runs into the hole and that pins it. If you rebuild the bearing, then you use a grub screw into your bearing block to hold it.

...........oztulesEdited by oztules 2010-01-08

Village idiot...or... just another hack out of his depth

Gizmo

Admin Group

Joined: 05/06/2004
Location: Australia
Posts: 5124

Posted: 06:37am 07 Jan 2010

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Here's a couple of pics I took yesterday. The tower, which is now in 3 parts beside the house I'm renting, and the "motor" as they like to call it, cover removed. The hammer is there for scale, I didn't hit anything I swear.

Yes, its as heavy as it looks.

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

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