Raising the oil pressure?

[Cord]

Searching through the threads, I've seen it mentioned a couple of times it was possible to raise the oil pressure on our engines. Does anybody have information on this procedure? The tractor is a 1110d with the 2T72 engine. At this time, I don't believe there is a internal engine problem, just poor pressure.

 

[mark777]

Cord,

I haven't done this on any of my tractors, but I understand and have studied the oil pump and piped gallies and this is what I think happens. Behind the oil filter there is a large nut. by loosening (or adjusting in and out) you can increase the oil pressure by slowing the oil return speed.

I'm sure someone will correct me if I'm wrong...hopefully someone who has done it and can tell you if it's clockwise (or CCW).

 

[Cord]

Ok, I assume this large nut is the bypass. Now, when you say "behind the filter" are you taking the filter off and seeing the nut? Or is there a adapter plate that needs to be removed to access the nut? Can you share any diagrams or images with me?

 

[mark777]

Cord, first thing you need to do is verify everything I've been told...as it is second hand information, but I believe the information was from a Deere contact I made a few years ago, and it all seemed credible and logical at the time. I have since heard it again and I think it was here on TBN.

Behind the oil filter is a large nut approximately 1 1/8" or the metric equivalent. On the opposite side of the nut and machined nipple are two flats machined to hold a 13mm end wrench; once the large nut (which acts as a lock nut) is loosened, the nipple is free to thread in either direction...in or out. This whole assembly is part of the cast aluminum timing cover including two oil passage ways seated to the block via "O" rings on each oil galley. I don't know how much, how far or which direction, but threading the nipple in a certain direction opens more to the pressure side galley and simultaneously restricts the oil return galley......(I think)

Here's a picture of the case cover, oil passages to the block and the machined flats inside the cover. Good Luck,

Mark

 

[mark777]

The orange dots indicate the oil galley's and the machined flat on the nipple....one more picture of the other side.

Mark

 

[normde2001]

I wouldn't be messing with that oil pressure unless you have already installed a gauge with a new sender and know for sure that you have low pressure. It would be a good way to destroy a perfectly good engine. My 16 year old Chevy recently began showing "0" oil pressure on a trip. I replaced the sender and it came back to normal, as it has on every car I have owned.

 

[Cord]

Thanks Mark.

Norm, yes the engine has low pressure. I'm not getting over 10psi at any time. The engine sounds healthy and is not blowing smoke. My guess is that the oil return is hanging open. Wouldn't be the first time as I read about another member having a simular problem.