Jubilee oil pressure

[Guesseral]

Yea got to look at the valve train this weekend and there is plenty of oil running through the rail. The 60 psi is still the norm though and when I run the rpm up it does go to 80. I am trying to remember if the pressure ran high before but I just can't remember it's been about 2 years since this tractor has ran. I will probable just get a new pump because I don't think a relief valve only is avalable, and if it is it would only be through a ford dealer and I would pay as much for the valve as I would for the entire pump after market.

 

[Soundguy]

80 would bother me.. 60 not so much.

what about droppingthe pan for a looksee at the pump and see what you can see.

have you checked with a test gauge?

soundguy

 

[Guesseral]

Sorry I got busy at work yesterday and couldn't answer you. If I am going to drop the pan (which I am) I want to have a new pump on hand and then just put it in at that point. They arn't that expensive and it sure woun't hurt to put a new one in to be sure. I am also going to put in a new pressure gauge while I am at it. All I am going to do is sell the tractor when I am all done and I don't want someone else to have problems with it that's just not me I don't sell junk. Of course after I put the money into it, no one is going to want to even pay what I have into it so I will probably never sell it anyways!

 

[varmint]

This may be a tad off topic, but my rich little brother has, among his fleet of fine autos, a Porsche Carrera S... he noticed his oil pressure was running towards the top of the gauge, way above where the manual specified, and being a pilot, he was worried. The Porsche dealer, never ones to shy away from taking customer's money, told him not to worry- "they all do that".

If you don't think your engine is too tight from its rebuild, I would agree that the relief valve is stuck. If it's a gear pump, there shouldn't be any way for it go "bad" and deliver too much pressure. Curious to see the outcome.

 

[Soundguy]

i'd for sure be checking it with a new gauge before I took a single bolt out of the oil pan and bought a new pump...

 

[Guesseral]

Yea I was thinking the same, I think tractor supply down the road has the gauges in stock but I have to order the pump.

 

[Jerry/MT]

Sorry I got busy at work yesterday and couldn't answer you. If I am going to drop the pan (which I am) I want to have a new pump on hand and then just put it in at that point. They arn't that expensive and it sure woun't hurt to put a new one in to be sure. I am also going to put in a new pressure gauge while I am at it. All I am going to do is sell the tractor when I am all done and I don't want someone else to have problems with it that's just not me I don't sell junk. Of course after I put the money into it, no one is going to want to even pay what I have into it so I will probably never sell it anyways!

I'd always recommend changing out the oil pump when you do a rebuild. At the very least, it should be checked for wear and rebuilt.

Every thing seems to point to a faulty relief valve. A relief valve is just a calibrated spring and a steel ball, usually. If you remove the pump, check the passage for the relief valve and see if ball is stuck or if there's too much tension on the spring. Some pumps have an adjustable tension on the spring.

The boudon gauges on most of these lube systems either don't read at all, or read some number when the engine is shut down and should read zero. Other than gauge to gauge variation, they seldom read high or low. Save your money on the gauge.

 

[Soundguy]

The boudon gauges on most of these lube systems either don't read at all, or read some number when the engine is shut down and should read zero. Other than gauge to gauge variation, they seldom read high or low. Save your money on the gauge.

toooooo many times I've not experienced that with a bourdon style gauge.

My 541 workmaster showed 0 psi when off and 35 psi high idle, 15 psi running.

using the same oil I sawpped it to a napa gauge. 55 psi at startup. double checked that, since it was a huge difference with a cheapy sunpro AND a tsc gauge I had. 55 psi both of them.

wish I could say that was the only time I saw a gauge read 'out of range' when running and still 0 when off.

have actually seen it quite a few times. USUALLY it reads low or 0.. but have seen a few flaky ones read high, even off the scal when running and 0 off. makes me think something is weak in the gauge and perhaps the coil is too easily uncoiled, or the needle is a flexible needle and has a positive stop post for 0 and an uncalibrated tube reading wrong yet still zeroing when off.

too many possibilities not to check a 15$ gauge before doing any real work.

besides. I keep a known good test gauge on a flexible whip line with a universal end I can union different fittings to, .. I keep this for just such a reason.. to double check pressure gauges on equipment. it lives in a CR bag in my tool box, along with a hadfull of common block fittings and compression/flare adapters.. etc..

 

[Guesseral]

Ok I get the point gauges suck! I did stop at tractor supply and the one they have that they say is for the tractor only goes to 55 psi which is totally different from the one on it that goes to 80 psi and they wanted $25 for it didn't really like it because it didn't go to 80 psi. I will take a look napa and see what they have for a gauge that I can test the pressure with, if it tests ok I guess I am all done with the process. I did find a rebuild kit for the pump it was like $55 with shipping, and I can get a new pump for around $85. If its not the gauge it has to be the relief valve who knows it could just be stuck as someone said earlier. Right now it is sitting out side, I put the front tires on and used the forks to take it out and pressure wash the rear end, the front is all together and painted but the rear wasn't even cleaned yet so I am at a lull for now till I bring it back inside maybe tonight not sure yet everytime I have plans to work on it in the evenings the wife has something else to do.

 

[Soundguy]

my bet is on a stuck relief.. but have a test gauge laying around for a tractor owner is a good tool anyway.

even if you pop in a new pump or rebuild kit.. get a 80 or 100 psi gauge to have as a 'tool'

even a cheaper sunpro for limited use.

check an auto parts store like advance..e tc. sunpro are usually 15$