8n oil pressure relief valve plunger view

[Joe Kimbriel]

Low oil pressure, 5 # max at high rpm, so I removed the pressure relief valve for inspection.
What it looks like is that the plunger has a flaw. Can someone tell me if it is,

ok?
Joe

 

[wore out]

Low oil pressure, 5 # max at high rpm, so I removed the pressure relief valve for inspection.
What it looks like is that the plunger has a flaw. Can someone tell me if it is,View attachment 67543 ok?
Joe

The "flaw" creates a leak to oil the timing gears.

 

[Joe Kimbriel]

Low oil pressure, 5 # max at high rpm, so I removed the pressure relief valve for inspection.
What it looks like is that the plunger has a flaw. Can someone tell me if it is,View attachment 67543 ok?
Joe

Update, cleaned and replaced and now have 15# at high rpm. Might be ok??

 

[Joe Kimbriel]

The "flaw" creates a leak to oil the timing gears.

Thank you really appreciate the quick response.
Joe

 

[Jim L WA]

Good to hear that helped. That oil pressure is not great, but you know that. You might try ordering a new spring for the relief valve and see it that helps. Otherwise you might start planning for a rebuild.

 

[Joe Kimbriel]

Good to hear that helped. That oil pressure is not great, but you know that. You might try ordering a new spring for the relief valve and see it that helps. Otherwise you might start planning for a rebuild.

Thanks, I will try a new spring. Long story short version. I am helping my son in-law fix up his gramps tractor and after getting it running, I noticed the oil pressure issue. After talking to his dad, he had the engine rebuilt about 2 years ago. He said that he has not used it much and said that is the way he got it back from the rebuilder. Bad deal he should have taken it back right then. Oh well I'll try the new spring but don't have a good feeling about the whole thing.
Thanks you guys for the help,
Joe

 

[Farmalldude45]

Thanks, I will try a new spring. Long story short version. I am helping my son in-law fix up his gramps tractor and after getting it running, I noticed the oil pressure issue. After talking to his dad, he had the engine rebuilt about 2 years ago. He said that he has not used it much and said that is the way he got it back from the rebuilder. Bad deal he should have taken it back right then. Oh well I'll try the new spring but don't have a good feeling about the whole thing.
Thanks you guys for the help,
Joe

Make sure the restriction is in the line to the oil filter.

 

[Farmalldude45]

Thanks, I will try a new spring. Long story short version. I am helping my son in-law fix up his gramps tractor and after getting it running, I noticed the oil pressure issue. After talking to his dad, he had the engine rebuilt about 2 years ago. He said that he has not used it much and said that is the way he got it back from the rebuilder. Bad deal he should have taken it back right then. Oh well I'll try the new spring but don't have a good feeling about the whole thing.
Thanks you guys for the help,
Joe

Make sure the restriction is in the line to the oil filter.

Make sure the restriction is in the line to the oil filter.

Also try a different gauge.

 

[Joe Kimbriel]

Make sure the restriction is in the line to the oil filter.

Tried new gauge, but what restriction? I don't know where to look.
Thanks,
Joe

 

[JMOR]

Tried new gauge, but what restriction? I don't know where to look.
Thanks,
Joe

I do not think there is a restriction "in the line to the oil filter". I say it is inside the outlet stand pipe in the center of the filter element. Here, with wire stuck in it.

https://imgur.com/JwI3DoT

 

[Joe Kimbriel]

Tried new gauge, but what restriction? I don't know where to look.
Thanks,
Joe

I checked and there is an orifice in the line right at the inlet to the filter. I have deduced that it's bad pump or bad rebuild job.
Thanks for all the help,
Joe,

 

[wore out]

I checked and there is an orifice in the line right at the inlet to the filter. I have deduced that it's bad pump or bad rebuild job.
Thanks for all the help,
Joe,

Could you post a photo of the "orifice in the line"?

Thanks!

 

[Joe Kimbriel]

Could you post a photo of the "orifice in the line"?

Thanks!

I removed it and a very small hole was clearly visible. I did not measure it but should have I guess for future ref.

 

[JMOR]

Could you post a photo of the "orifice in the line"?

Thanks!

Don't hold your breath!