Testing JD 2010 hyd. pump output

I am trying to make a systematic effort to improve the loader performance on my '61 2010 row crop utility. The loader is a JD 46 and has loads of strength to lift the front end but the lift cylinders don't want to lift a bucket of snow. I'm thinking there is an intern seal leaking. That being said I have tested the break away connectors for pump pressure and will do the same for the other points. I had 1200 psi at the break away connectors and power steering works great. I will check the loader lines next

My questios, what should I see for good pressure at the loader? And could the control valves be impacting the performance of the lift cylinders and still allow the bucket to be a strong performer.

I'm away from my manuals righ now to see what factory "spec" is, but 1200 PSI ain't much!

If you have that or less at the loader, it ain't gonna lift much!

I'm thinking the pressure valve on the pump may be messed up or stuck somewhat open. Kind of puzzling. The 3 pt works great and the bucket tilt is strong. I'm goi g to replace seals and see if there is a cylinder issue contributing before I think about anything with the pump

We need to get the "specs" for pump output psi.

As far as the loader goes, does it "fall" with a load in the bucket? If NOT, the cylinder seals aren't the issue,.

O-T manual say pressure should be 1475-1525

Bob if I read the I-T manual right it says PSI should be 1475-1525

Pressure valve problem maybe? The bucket doesn't lift well when filled with snow but the dump cylinder ders will move it just fine.

Valve problem or cylinder seals by passing

(quoted from post at 21:49:58 03/19/15) Valve problem or cylinder seals by passing

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Where is the correct location to take a true reading of the pump pressure? I can connect to the loader lines as they are a direct connect to the pump but I think the spool valves could also have relief valves in them that are suspect. They are old and in questionable condition themselves.

2010's don't have many locations to check hyd oil pressure. This is the only relief valve that I located in my brief search of the parts catalog except for a relief valve in rockshaft control valve.

You can test for cylinder leakage by unhooking one side and putting the oil pressure to the other side and see if oil runs out the side it should not.
You could also tee in a gauge at a cylinder hose to read pressure just bottom out the cylinder to get it to go to relief.
Also make sure your valve is moving the spool fully. Worn linkage can cause them not to activate all the way.

The I-T JD-21 manual has along explanation of how to check hyd pressure so it is a good idea that you pick one up. Paragraph 150 explains it in detail

Okay I'll add my two cents as well to the topic.LOL.. Every thing you mention could affect the operation. Relief valves in the pump, internal leaks in the control valve/ seals in the lift cylinder or collapsed rubber hydraulic lines. First thing I would do is, run the tractor and then shut it off and feel the hydraulic pump to see if it is hot. If it is hot, clean the filter. Take it out and stand it on end and fill it with oil, if it is slow to drain it needs to be cleaned further. Remember what can't get out, can't get in and this starves the pump of oil, causing it to heat up. Hopefully the pressure will rise from the 1200 psi previously taken. Second thing is to take a pressure reading at the remote cylinder hook ups and use as a baseline to check at other spots in the system. Third, starting from where ever the pressure line comes from, Tee in at each connection to see where a loss occurs. If you find no losses in the system and would like to look at the relief valves it "may be possible to do with out removing the pump or it may not be possible", their is one on the side and bottom of the pump. I've always removed the pump, It can be done with out splitting the tractor, if you would like an explanation on how I do it post back...
Jo

(quoted from post at 11:51:12 03/20/15) The I-T JD-21 manual has along explanation of how to check hyd pressure so it is a good idea that you pick one up. Paragraph 150 explains it in detail

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I have a service book, will double check what number it is. I've read the test procedure but it didn't state where to connect. I will be looking again this evening and wrapping up Saturday.

2010 Industrial but hydraulically the same....

On that tractor it is a whole lot of work just to check. Pull the seat and lift cover and a couple other things as per the manual