Hydraulic pumps

SVcummins · Oct 10, 2019

Looking for options again or still ? Seems most of the aftermarket ones are around 970$ found a site with rebuilt ones for 650$ plus 300$ core seems like a decent price if they will credit you for the core ? Oem Is a lot of money probably can?t go that route

The local hold em n screw em Is a little higher like always on the exact same part I don?t plan on buying from them
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Hay maker2 · Oct 11, 2019

What exactly is wrong with your pump?

SVcummins · Oct 11, 2019

It is knocking and it lugs the tractor down a lot when
you cycle the scv lever

Hay maker2 · Oct 11, 2019

(quoted from post at 17:35:03 10/11/19) It is knocking and it lugs the tractor down a lot when
you cycle the scv lever

I assume that this is on your 3020, doesn't that have a farmhand loader on it?

the loader work ok, but the SCV does not?

SVcummins · Oct 11, 2019

Yes 3020 powershift but no loader . The loader was
on the 4020 right now the loader is in pieces in the
garage waiting to be reassembled and reinstalled

Al Baker(pumpman) · Oct 11, 2019

Ever thought of pulling your own down and repairing it?? I have done many over the years and found more times than not it wasn't a bad deal. Just mark all eight plugs and springs with pistons and keep them in order. Mark the housing and reassemble the way it came apart. Al

Hay maker2 · Oct 11, 2019

I know they are not cheap.
Have you checked your supply pressure and volume?

I also know that there is nothing funner than to drop the front end on a 3020 or a 4020, but for the price of a new pump I would swap your pumps around form the 4020 to the 3020. As much of a PITA that this is, its much better than OWNING a new pump and that's not the problem.

I have also rebuilt the pumps too, you don't save much. I think your better buying a new one if that is truly the issue.

SVcummins · Oct 11, 2019

By the time you buy the parts to rebuild one it?s
cheaper to get one with a warranty the last time I
looked .

buickanddeere · Oct 11, 2019

(quoted from post at 12:35:03 10/11/19) It is knocking and it lugs the tractor down a lot when
you cycle the scv lever

Could be just the pump drive coupling .

SVcummins · Oct 11, 2019

I?m thinking about that actually

SVcummins · Oct 11, 2019

I wish that would be it but that pump is taking some
serious power to turn

fdt860 · Oct 12, 2019

(quoted from post at 21:46:22 10/11/19) I wish that would be it but that pump is taking some
serious power to turn

Cap the pump pressure line before going further. If pump is robbing power even with a cap, you are likely to have a few broken poppet valves seats and springs in the pump.
I found a place in Turkey that sold the individual parts of those pumps for cheap. You can get rebuilt kit without shaft for around 300 on fleabay.

Otherwise tractor is leaking big time.

SVcummins · Oct 12, 2019

It?s only taking power when I use the remotes

Tx Jim · Oct 12, 2019

(quoted from post at 02:10:50 10/12/19) It?s only taking power when I use the remotes

Many frt CC hyd pumps have been replaced only to determine that pump replaced wasn't the problem.

Does engine load while operating steering or 3 pt? If no engine loading with PS/3 pt operation something is wrong with scv poppet valve adjustments such as return valve clearances set ""too wide"" not opening quick enough to send oil to return path.

fdt860 · Oct 12, 2019

I would suggest to swap scvs if you have spares.
My 4020 did have a huge power loss from the pump. It was the detent valve roller pin. Repair cost 50 cents and diagnostic was obvious.

Al Baker(pumpman) · Oct 12, 2019

You might have two different things going on. I did a 4020 this spring that knocked really bad. When I pulled it off I noticed the spline was really worn. Nothing else looked bad in the pump. I installed a new shaft and coupler with seal kit and loud knock was gone. Maybe you have a problem with a remote, and a problem with the drive?? Easy to pop the drive coupling and see if the rubber bushings are good and the spline is tight. Al

SVcummins · Oct 12, 2019

Thanks Jim I?ll do a lot more testing before I throw a
thousand dollar pump at it . I?m not a parts changer
That?s what?s nice about this page is you guys have
given me a lot of things to check together with the
manual we?ll get er figured out. When I started this
journey to become a mechanic i swore I?d never be
the guy who throws parts at something to try and fix
it .

SVcummins · Oct 12, 2019

Al I?ll check that

SVcummins · Oct 12, 2019

I could swap scvs pretty easily . Going to drill today
with the old power lift lz1010 so no hydraulics
needed other than steering so we?ll see what
happens .

SVcummins · Oct 12, 2019

So with my trusty infrared thermometer and jumper hose I set out to do some am diagnostics I got the oil up to operating temp which took about an hour and I did get a little chatter at about 30 minutes in then it stopped and never anything else the remainder of the test

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