Air in oil. What is normal?

[Lrex]

That sounds like the relief valve unloading.

If that happpens too frequently or is constant that can create a lot of aeration. Constant unloading is not normal and indicates a problem in the hydraulic circuit.

Does the loader lift and lower normally?

Dan

Yes, all the hydraulics function normally. If I’m not mistaken, the relief for that pump is underneath the tractor not on the pump. The noise is definitely coming from the pump.

 

[TheOldHokie]

Yes, all the hydraulics function normally. If I’m not mistaken, the relief for that pump is underneath the tractor not on the pump. The noise is definitely coming from the pump.

Its difficult to assess things from a utube video but that noise does not sound normal to me.

Dan

 

[whitetiger]

Yes, all the hydraulics function normally. If I’m not mistaken, the relief for that pump is underneath the tractor not on the pump. The noise is definitely coming from the pump.

You would be mistaken.

 

[North Idaho Wolfman]

You would be mistaken. View attachment 178933

UMMMMM you meant this relief valve right.

 

[Lrex]

You would be mistaken. View attachment 178933

I didn’t know there was a regulator there. I don’t know what it does aside from what’s in the name. do you have an exploded view of that?

also where do I get my hands on the a digital workshop manual? I can’t find anyone that sells one.

 

[Lrex]

UMMMMM you meant this relief valve right.

View attachment 178934

Yes I was talking about the relief, not regulator. Thanks for uploading pictures for clarification. I bet is on the regulator. Now to find out what that does and what’s inside.

 

[North Idaho Wolfman]

Yes I was talking about the relief, not regulator. Thanks for uploading pictures for clarification. I bet is on the regulator. Now to find out what that does and what’s inside.

DO NOT mess with the two adjustments!

 

[TheOldHokie]

Yes I was talking about the relief, not regulator. Thanks for uploading pictures for clarification. I bet is on the regulator. Now to find out what that does and what’s inside.

I keep forgetting the L02s have that regulator on the pump

So far your only complaint is some noise from the pump area which may or may not be unusual. I seem to recall a previous complaint about that and I dont recall any resolution. My immediate advice is tread very carefully and resist the urge to take things you do not understand apart.

Dan

 

[Lrex]

I don’t plan on tearing into it. I’m just trying to understand it’s purpose and function and how it is different than a pressure relief.

 

[TheOldHokie]

I don’t plan on turning into it. I’m just trying to understand it’s purpose and function and how it is different than a pressure relief.

I dont have a WSM but I can make an educated guess based on the plumbing in the parts diagrams . The L02 appears to have a tandem pump just like the L01. On the L01 the rear section was a single outlet stream used for PS and the PS return was sent to the HST charge circuit. The L02 now has the regulator valve bolted to that outlet.

It appears the regulator now divides that output into three streams. One goes to the PS, one goes to the newly added PTO clutch, and one goes to the HST (charge circuit?) That would imply pressure compensated flow control and possibly over pressure relief for one or more of those circuits. That process may well create some noise (and possibly aeration) especially at higher flow rates.

I imagine @whitetiger knows the details.

Dan

 

[Lrex]

See updated videos. After warming the tractor up and sitting at an idle AND slightly turn the steering wheel the noise goes away. I am thinking this is not an air in oil issue but maybe a regulator issue. Any thoughts?