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 Post subject: EMD 567 governor question
PostPosted: Mon Jul 10, 2023 12:11 pm 

Joined: Mon Aug 23, 2004 2:28 pm
Posts: 433
In a 567, the governor has (using my layperson terms) an 'upper and lower chamber'. Fill cap is in the top chamber. Site glass appears to register level of lower chamber.

Question: are there any adverse consequences to over-filling (added about 1/2 quart)? I'm not talking about oil coming out of the fill cap, but just in general. Level in site glass wasn't visible to begin with. Sight glass is even leaking (oozing) a tad.


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 Post subject: Re: EMD 567 governor question
PostPosted: Mon Jul 10, 2023 1:54 pm 

Joined: Sun Aug 22, 2004 11:06 am
Posts: 539
Location: NE PA
If you fill the governor above the sight glass it will weep out of the orifice in the top of the sight glass and run down on the gearbox cover. The orifice is there to provide an equaliztion to atmosphere so the oil seeks its own level.


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 Post subject: Re: EMD 567 governor question
PostPosted: Mon Jul 10, 2023 2:36 pm 

Joined: Mon Aug 23, 2004 2:28 pm
Posts: 433
Thanks, Mike!

So is this a bad situation, or a self-correcting, not a big deal situation?
I ask this because I am wanting to understand how these work.


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 Post subject: Re: EMD 567 governor question
PostPosted: Thu Jul 13, 2023 8:22 am 

Joined: Mon Apr 23, 2012 7:10 am
Posts: 41
The governor oil should be half glass when the engine is running. Too much can sometimes cause issues.
Have seen where crews overfilled the governor and engine not loading properly.


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 Post subject: Re: EMD 567 governor question
PostPosted: Thu Jul 13, 2023 10:06 am 

Joined: Thu May 24, 2012 1:37 pm
Posts: 2171
If I remember correctly, and I may not, didn't Maier-Mattern valve gear tend to lock up if overfilled? If the actuating pistons in the governor mechanism cannot retract properly after reaching full extension... there might indeed be issues.

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