Ford 1710 - Slow and Weak Rear 3pt Lift - Help!

[JC-jetro]

Got pics but gotta figure out how to load them. And I do not see a diverter valve (assuming its an external device). Curling the bucket did not make a difference. At this point we are thinking the hydraulic oil is too thin and that its possible there is nothing else wrong mechanically. Right now it has New Holland 134G hydraulic oil. We are going to try a thicker oil and new filter tomorrow.

Time for a lesson in oil viscosity. Can anyone refer me to a chart that will tell me where 134G falls in comparison to other oils? Also, what the letters all mean and some info on oil interactions (how it behaves when hot/cold). I know AW means anti-wear and that 134G is a multi-purpose oil.

Also, I need to mention that with the new piston seal, the TPH arms stay in the raised position and do not seap down anymore (without a load of course), whereas before they would seap down from highest position to the ground within 10 minutes of shutting off the engine.

And JC, I cannot find the main pressure relief for the pump. Would that be a screw, or perhaps some sort of plate?


Lastly, thanks to everyone for your help on this, we'll eventually get this figured out!!

RMJ22,

in the attachment below you'll see your hyd lift cover and associated stuff. Item #3 is your pressure relief. The pics below shows the device externally on my tractor that is identical to yours and guts of it in the next picture. just inspect the valve spring to see if it is there. If it is too tight it might cause dead heading of your pump ( not a good thing) , if it is too loose it diverts most of the flow back to diffy with very pressure available for anything else. 134 g is your oil, I would not contaminate the system with something different. your pump and component are designed to pump it rather than thick grease or much heavier oil. viscosity is proportional to oil temp, higher temp=less viscous, lower temp= more viscous. changing the to heavier oil is not your solution. Need to find the real cause. need to do pump flow test to see if the pump is actually pumping.


JC,

relief device.



relief spring and valve (conical shape valve)

 

[RMJ22]

Thanks JC. Will stay with the 134G and going to check the relief valve after work today.

 

[Hooked_on_HP]

If your pressure releif was set to low your loader would not work. As JC stated do not use any other oil. This is the oil this machine was designed to work with. Using other oils can cause problems that make your current problem minor.
Bill

 

[RMJ22]

Trying to upload pics now. And how do I go about "set" the relief valve? Is there some sort of adjustment? Also, I'm going out now to try and get that valve off and apart to see what it looks like.

 

[JC-jetro]

Trying to upload pics now. And how do I go about "set" the relief valve? Is there some sort of adjustment? Also, I'm going out now to try and get that valve off and apart to see what it looks like.

On your picture on the left, you see the cylinder head and the bolt on the left side of it looking from your picture's direction. You should put a pressure gauge there to see if you have any pressure and what it is. if you don't have the gauge then you can buy one from Northern under $20. It might be a bit messy buy if I did not have the gauge I'd open the bolt off and see if I can adapt a flex hose there pointing in to an empty bucket to see if I get any flow.



jc,

 

[Hooked_on_HP]

Coud you post some more pics of where the hoses for the loader tie into the hyd system.
Bill

 

[JFS2295]

..... And I do not see a diverter valve (assuming its an external device). .....

It's under and in front of the pedals on the right side.

 

[Hooked_on_HP]

Did you get it fixed.
Bill

 

[RMJ22]

No, its not fixed, but we once again think we found "the" problem. Looks like some previous owner must have swapped the valve and cover. . .my cover has no valve in it! There is no pressure relief valve where the parts diagram shows. Ordering new assembly and keeping fingers crossed!

 

[JC-jetro]

No, its not fixed, but we once again think we found "the" problem. Looks like some previous owner must have swapped the valve and cover. . .my cover has no valve in it! There is no pressure relief valve where the parts diagram shows. Ordering new assembly and keeping fingers crossed!

Hmmm, that looks different from NH diagrams. How doe is look on the other side of on picture #1 )left)? on the same pic I can see some sort of internal passage way that leads to this cover. Can you pan to the right and take a picture. Do you see a bolt there?. you might not have a valve like what I ave shown earlier, but a spring the oil passage way and required # of shims can achieve the same thing.

JC,