3020 Diesel - tank for front hydraulic pump?

[buickanddeere]

As previously stated. An open centre valve on a closed centre tractor is just a giant internal hydraulic leak.
The ideal connection would be a "T" in the high pressure line prior to the SCV valves. To supply the post pounder's closed centre valve. The return oil should go to between the transmission filter inlet side and the transmission oil pump discharge .
No need of a front tank addition.
Several persons here have in the past have posted images of the ideal , direct hydraulic connections .
While your tractor is a Waterloo , mine is a Mannheim and a bit snootier regarding the hydraulics . You would not believe it was the same tractor when the backhoe or the log splitter . Is connected direct and returned to the ported filter instead of through the SCV.

 

[MNBobcat]

The problem you are experiencing sounds as if the control valve on your post driver is set up for open center hydraulics. You need closed center.

The control valve is a closed center. It was set up at the factory for a John Deere tractor. If I stop pounding and leave the control valve on the dash for the rear remotes wired open....just leaving the control valve for the post pounder closed will allow the tractor hydraulics to catch up. So I'm able to confirm that the pounder does indeed have a closed center.

 

[MNBobcat]

Several persons here have in the past have posted images of the ideal , direct hydraulic connections .
While your tractor is a Waterloo , mine is a Mannheim and a bit snootier regarding the hydraulics . You would not believe it was the same tractor when the backhoe or the log splitter . Is connected direct and returned to the ported filter instead of through the SCV.

You wouldn't happen to have any links to the photos would you? Or maybe give me some suggestions on what I could search on to find them? I'm struggling a little to get my head around how the "T in the high pressure line prior to the SCV valves" would work. Would that mean no longer using any control valve on the tractor and that the new line in the "T" would have pressure all the time? Then I just hook a quick coupler to it that I can plug the line from the post pounder into?

 

[Tx Jim]

Tee for pressure goes in line just in frt of brake valve.

 

[buickanddeere]

You wouldn't happen to have any links to the photos would you? Or maybe give me some suggestions on what I could search on to find them? I'm struggling a little to get my head around how the "T in the high pressure line prior to the SCV valves" would work. Would that mean no longer using any control valve on the tractor and that the new line in the "T" would have pressure all the time? Then I just hook a quick coupler to it that I can plug the line from the post pounder into?

Thank you txjim for the supply image . Do you have the T image for the return line just above the transmission filter ?
Routing the pounder direct instead of wiring the SCV valves open will operate much better.
Dumping the return oil direct into the transmission case will starve the front pump.
I'll check my books tonight but iirc the 3020 maybe has a 1.4cu" pump with about 11gpm if the engine is redlined .

 

[Tx Jim]

Thank you txjim for the supply image .Do you have the T image for the return line just above the transmission filter ?

iirc the 3020 maybe has a 1.4cu" pump with about 11gpm if the engine is redlined .

b&d
You're welcome.
I posted image of correct return for hyd oil in my reply which is #4 of this thread.

Factory hyd pump for a 3020 SN<122,999 is a 39 CM3 (2.4 IN.3)

 

[jenkinsph]

I don't have a 3020 tech manual to research but I think trans pump is closer to 5 GPM. I doubt total hyd output on 3020 is 19 GPM. Actually trans pump & frt pump output can't be added together on a CC hyd system as CC requires trans pump output to function properly. Tractordata shows 3020 @ 14 GPM total flow which I think is more realistic.

If the transmission pump supplies the front pump with oil then it has to flow at least 14 gpm to keep up. Additional oil for the transmission would increase the additional flow requirements I suspect.

 

[Tx Jim]

If the transmission pump supplies the front pump with oil then it has to flow at least 14 gpm to keep up.

As I previously stated I have no JD tech(service) manual to check trans pump spec's but I guarantee you that the trans pump has nowhere near 14 GPM!!! No Way Jose. You must take one thing into consideration: the frt pump only pumps oil when needed but under normal conditions which is most of the time as long as there's no large internal leak the pump is "out of stroke" IE not pumping.

 

[Tx Jim]

jenkinsph
Here's the trans pump spec's sraight from JD 3000 series tech manual for both type trans which type of trans contributes to trans pump GPM confusion. When I stated 5 GPM I was thinking about SR trans models.

 

[MNBobcat]

jenkinsph
Here's the trans pump spec's sraight from JD 3000 series tech manual for both type trans which type of trans contributes to trans pump GPM confusion. When I stated 5 GPM I was thinking about SR trans models.

Thanks! I see its 6GPM at 1900 rpm. I've been running it at 1500 RPM since I don't like running the engine hard under light load. I'm guessing then I might be closer to 5 GPM.

I had thought about finding a PTO mounted hydraulic pump and getting an external tank to go with it. But those pumps aren't cheap.