IH 2504 oil pressure way to high

[nashranch]

Just put on new oil pressure gage today and I'm seeing well over 100 lbs oil pressure.. this is the second gage.. First one pegged and was stuck max'd out. I know over 100 psi is not right so i wonder what's going on??

 

[Fritz Maurer]

How long has this been going on?

 

[nashranch]

I've only owned the tractor a month. When i got it the sending unit was there but no wire going to it. So i took that sending unit off and put on sn oil pressure gage i had and it pegged it right away. So i bought another and put it on today and this gage started going way too high so i shut it down before it blew this gage. Something is wrong somewhere. The guy i got it from said it started knocking so he put it up for sale. The tractor starts really good but blows a ton of smoke out of it. I bet it's all related.

 

[nashranch]

The other day i drained the oil and was gonna remove the oil pan but i ran into the power steering cylinder and the front axle bracing that is under the oil pan. I said K rap and put all the pan bolts back in that i had removed. I am seeing a beat up oil pan too like it's been hit before. I am betting damage has been done to the oil pump or it's plugged up. what do ya think?

 

[Janicholson]

High pressure is caused by a stuck (or shimmed by the owner) pressure regulator. the pressure can be in the 70s on IH tractors. I could not find any pressure regulator on the parts diagrams. Others may know. Jim

 

[used red MN]

High pressure is caused by a stuck (or shimmed by the owner) pressure regulator. the pressure can be in the 70s on IH tractors. I could not find any pressure regulator on the parts diagrams. Others may know. Jim

Pressure regulator is under plug 31. CNHI IH 2504 parts catalog

 

[caterpillar guy]

Several possibilities from stuck relief valve to shimmed to high to other plugged parts or stuck down line.

 

[BarnyardEngineering]

I would drop the oil pan and start pulling bearing caps.

 

[Fritz Maurer]

See if there is any debris in the oil filter. That may offer a clue. If it was knocking it sounds like the whole engine needs to be dismantled anyway .

 

[Dieseltech]

SOME late IH engines had the relief valve UNDER the bolt on filter base on the side of the block. MY 560 diesel had a short block installed years ago and it has the valve in the block side.

 

[nashranch]

I pulled that relief plug..all i get out of there is the spring. I tried a strong magnet in the hole but it won't pull anything out. Should i get the plug below the spring too?

 

[Dieseltech]

I pulled that relief plug..all i get out of there is the spring. I tried a strong magnet in the hole but it won't pull anything out. Should i get the plug below the spring too?

I'll bet the valve is STUCK inside. Try CRANKING engine with the starter and see if it will move any while the cap and spring are off.

 

[Janicholson]

I pulled that relief plug..all i get out of there is the spring. I tried a strong magnet in the hole but it won't pull anything out. Should i get the plug below the spring too?

Yes. The actual valve is down there. (from looking at the parts diagram supplied above) It is hollow and should come out. One thing to try is putting the plug back in W/O the spring, and starting it for 10 seconds. If the oil pressure stays up. that valve may be stuck firmly. if it does not go up, the valve may have freed up and be loose in the hole.
An expanding bolt, or a pilot bearing puller could be used to pull it out. Jim

 

[nashranch]

It is stuck bad... Put plug back in.. No spring and started it and ran for 30 seconds and it never moved.. plan b is now in affect

 

[nashranch]

Custom slide hammer ground to fit pulled it out. Now i guess I'll polish it up and stick back down the hole and try it again

 

[Dieseltech]

Custom slide hammer ground to fit pulled it out. Now i guess I'll polish it up and stick back down the hole and try it again

Mine has 45/50 PSI after a cold start..

 

[nashranch]

Ya for 35 lbs oil pressure

 

[nashranch]

I drive this tractor around today and the oil pressure stayed at 35lbs... Temp got up to about 180° and believe it or not it quit blowing a ton of smoke out of it. It still is really noisy and something is knocking. As soon as i get the oil pan off I'm sure I'll see what is knocking or broken. Working on getting the steering cylinder off so i can drop the pan

 

[BarnyardEngineering]

Ya for 35 lbs oil pressure

Dang. I never thought in a million years that would be the problem.

 

[Dieseltech]

I drive this tractor around today and the oil pressure stayed at 35lbs... Temp got up to about 180° and believe it or not it quit blowing a ton of smoke out of it. It still is really noisy and something is knocking. As soon as i get the oil pan off I'm sure I'll see what is knocking or broken. Working on getting the steering cylinder off so i can drop the pan

If an injector is stuck OPEN, that will make a loud knock also on that engine, a redneck test is to remove all four injector lines at injectors then crank engine, there should be NO compression air blow back out the injector inlet, if there is, that injector needs repair.