I give Up -- Jubilee Oil Pressure!

Tall T

Well-known Member
I have searched till I'm blue in the face and cannot find what the factory oil pressure was for the Jubilee?

In all other engines I rebuilt it was easy to find.

Thanks,
Terry
 
the service manual lists the relief pressure .. so that should give you some clue! :)

Not uncommon to see healthy red tigers start cold and revved to 60 psi and then settly to 50-55 psi .. less depending on level of wear and oil type.
 
(quoted from post at 06:03:09 06/19/14) the service manual lists the relief pressure .. so that should give you some clue! :)

Not uncommon to see healthy red tigers start cold and revved to 60 psi and then settly to 50-55 psi .. less depending on level of wear and oil type.

Thanks!

Mine was constant at about 46 psi but after a badly needed oil change to 15W40 it gained 4 psi and stays at 50.

I'd sure like to know where in this Dearborn Shop manual the pressure relief valve rating is. All I see is the 2# tension on the relief valve spring.
 
I'm no where near my manuals, but when i get home after my double, and feed all the farm animals, and if i'm still awake before getting up for my double tomorrow, i'll walk out to the shop to find my shop manual of fo-19
 
(quoted from post at 11:09:37 06/19/14)
(quoted from post at 06:03:09 06/19/14) the service manual lists the relief pressure .. so that should give you some clue! :)

Not uncommon to see healthy red tigers start cold and revved to 60 psi and then settly to 50-55 psi .. less depending on level of wear and oil type.

Thanks!

Mine was constant at about 46 psi but after a badly needed oil change to 15W40 it gained 4 psi and stays at 50.

I'd sure like to know where in this Dearborn Shop manual the pressure relief valve rating is. All I see is the 2# tension on the relief valve spring.
ot your NAA, but FO-20 for hundred series shows spring at 9.8 # and relief pressure at 45 to 50#. I would call yours excellent & worry no longer. Happy for decades with 10# on 8N & like gauge mid-point on my other tractors. If had idiot light for oil, rather than gauge, you wouldn't worry as much. :wink:
 
Yep, I'm a perfect candidate for an idiot light. :D

I bought the owners manual and the thin Dearborn shop engine one but I guess I need that other manual so I'll get one.

By the way SoundN, what is a "double"; double shift as in 16 hour day?

Thanks much,
Terry
 
didn't have time to dig my dearborn manual out.. but did grab my IT manual. paragraph 117 i believe details, as Jmor did. spring length, and # and relief cracking pressure.

your 46-50 is right there on book spec.
 
Thanks for doing that.
I've got the Dearborn shop manual but i don't think it is in there.
I need that other manual everyone talks about.

Terry

P.S.
The valve hole on one of my rims was enlarged and here's a before and after. I used steel first to thicken the area and then brass.

mvphoto8158.jpg


mvphoto8159.jpg

mvphoto8160.jpg
 
Nice. My welding skills aren't all that great, so I would have just welded the old hole shut and drilled a new one a little ways around the rim.
 

Now why didn't I think of that!! :D
I could have heated and flattened a new area and then drilled.

I should have put a ring in the hole first -- like a lock washer
for all the trouble shaping the hole was. There's my quota of shoulda's and coulda's for the day.

Brazing is so easy on the flat, but it's a challenge to do edges.
 
looks good. won't rust at the hole either. ;)


most of us cheat and weld a patch over the old hole, then redrill a new one.

yours will work fine.
 

Thanks!
I'm glad that the valve hole on the other one is fine.
Ya, I love the non-rust factor -- diminishes the "good money after bad" syndrome cause at least it will last. :)
 

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