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Building oil pressure in your old tractor

F

fastline

Member
I posted in the Case forum for my 1170 but I thought I might ask some general owners to see if this is seen anywhere else. My 1170 right now will pump up about 0-5psi oil pressure (on the gauge anyway) for 10sec on cols start. It will then slowly build pressure to 40psi.

In warm weather it seemed to pump up to 40psi pretty normal but would then drop off to like 5, then right back up to 40 and hold.

Some have said the sender tube is tiny and causes some and tube placement in system is poor but I am nervous as hell. I don't have time for an engine rebuild and of course I bought it with "fresh rebuild BS". Engine sounds real good but I would probably be sad if it went on a dyno.

Some say the oil filter is inverted and needs time to fill but all I need to know is if my crank bearings are getting oil...
 
fastline: You are just seeing the lag time involved with your oil pressure gauge. IF you are really concerned then check the oil pressure with a mechanical gauge installed right at the engine. This will eliminate the lag that is usually caused by the long small oil supply line to the dash gauge if it is mechanical. If your gauge is electric then you are just seeing the time it takes for the sender and gauge to get the first reading of the oil pressure as it is rising.
 
If it were me I would hook a known gauge in system. I keep a
gauge on a hose with a 1/8 pipe fitting on the end. It will screw
right in most galley holes.

I'm not sure what to say about your cold start but I wonder about
maybe a relief valve sticking on the warm weather start although
I can't say I have seen that.

If the pressure is real then your bearings should be getting oil.

RT (my 2 cents)
 

About the only other thing I can think of other
the gauge"s is/could/maybe Sump pick up is
partially clogged up?? We had a 620 J/D that
would carry great oil pressure with 10 weight
oil & nearly none with 15w40 until it got warm.
Sump was looked clean but varnished up oil
residue....
 
fastline,
My Jubilee does the same thing. I have a newer spin on filter, instead of the old cartridge. After the tractor has sat for a few days, remove the filter. You may find the filter has drained back. You can even see it on the dip stick. My oil is above the full mark.

I switched to a full synthetic, in hope the dry start won't hurt the engine.
George
 
(quoted from post at 14:56:00 12/20/13) We told him that on the Case forum also. There is about 3' of that tiny oil line to the dash.
Loren, the Acg.
Click to expand...

We saw the same symptoms on older aircraft with long lined direct reading oil pressure gages. Our fix in winter was to 'prime' the oil pressure line with hydraulic fluid. The thinking was that the hydraulic fluid was so much thinner that it would transfer the oil pressure without 'clogging up' the delivery line. Worked good for a time, and then had to be redone because when the engine (oil) did warm up it would work it's way into the line and dilute the fluid. Certainly no concern to have a teaspoon or so of hyd. oil mixed with the engine oil

Sw

Sw
 
Start at the source remove and clean oil pickup tube look for
and holes or places where it can get air. Then work your way
up to the pump. It's most likely not above that but you never
know.
Walt
 
Hello fastline.

What you need to do is to install a known accurate oil gauge in the system. It sounds like the oil pump pressure regulator is sticking though. If the pressure goes up to 40 lb. it should stay up there,

Guido.
 
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