Volvo EC210LC, Hydraulic problems pump no 2

GudumH · Jul 12, 2020

It is the opposite

I have moved the servo hose and pressure hose on pumps 1 and 2

, so pump 1 still does not work.

But I'm probably pretty sure everything else works. except pump 1 and its regulator.

And the reason the bucket now works is because pump 2 now supplies it!

funwithfuel · Jul 12, 2020

Oh, I understand. Then yes. I agree 100. Yes , you basically switched identities between the two. Do you have a case drain filter available to you? I would remove it and cut it open. If there's a bunch of gold glitter, I would start considering a pump replacement. If its clean, I would just go after the regulator. Depending on your comfort level, I would suggest swapping the actual regulators between the two pumps. Have you looked at either filter yet?

GudumH · Jul 12, 2020

funwithfuel said:
Have you looked at either filter yet?

What filters do you mean ???

(No, I do not have a case frain filter, yet

)

funwithfuel · Jul 12, 2020

There's the case drain. Large diameter spin on in the pump room. Then there's the return filter. It sits under the round plate in your hydraulic tank. Lift it out slowly. The oil passes from the outside-in . Look for anything, vinyl, metal, bits of this or that. That will give you an idea of where to start looking.

GudumH · Jul 12, 2020

I have switched around the regulators now. And it did not help.

But why can it not hold 500 psi, on pump 1 ?? Servo , pressure , Now pump 1 has had both regulator and control pressure changed.

As I see it, there must be something inside pump 1, which may be leaking, and therefore the pressure is only 200psi and not 500 psi.

funwithfuel · Jul 12, 2020

Did you find any sparkly stuff in the filter? I'm beginning to think that the yoke for the swash plate may be broken

GudumH · Jul 12, 2020

No, I did not find anything in the filters

GudumH · Jul 12, 2020

funwithfuel said:
yoke for the swash plate

Is that the adjustment plate you mean?

funwithfuel · Jul 12, 2020

You've isolated it to the pump. Bases on all your testing. No debris is at least good in the fact that you haven't scattered shrapnel throughout the system.

GudumH · Jul 12, 2020

funwithfuel said:
You've isolated it to the pump. Bases on all your testing. No debris is at least good in the fact that you haven't scattered shrapnel throughout the system.

So now there is no way around taking the pump out of the machine,?

funwithfuel · Jul 12, 2020

Yes, in a way. It ties the regulator to the rotating assembly dictating the displacement of the pump

funwithfuel · Jul 12, 2020

I don't see anything else. If you've done everything you said, the problem can be nowhere else but the pump.

GudumH · Jul 21, 2020

Hello again

Then pump 1 is disassembled

funwithfuel · Jul 21, 2020

Looks like the swash plate cradle and bearings took a hit. What about the rack that actuates the swash plate? Any scarring or scratches, did it feel loose? You're on the hunt for the slightest bits of dirt, debris or obstructions. Even the tiniest. You can't be clean enough.

GudumH · Jul 21, 2020

funwithfuel · Jul 21, 2020

What about the side that faces the rotating assembly? Any scratches over there. The slippers look good, as best I can see in the first pic.

GudumH · Jul 21, 2020

Here are all the parts

1/2

GudumH · Jul 21, 2020

Here are all the parts

2/2

funwithfuel · Jul 21, 2020

That last pic, I don't like it. I see a knick on the backside of the ball socket, scuffs on the spool and I dont think we should have exposed threads there.

GudumH · Jul 21, 2020

Can you name the pic ?

Volvo EC210LC, Hydraulic problems pump no 2

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