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1965 4020 power beyond

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MarkWarden

New User
I have found several post on this site about installing power beyond on a 1965 4020. I just to make sure all of the info I have read , Im understanding correctly so I do not damage my hydraulic system. Im wanting to add a backhoe to my 4020 and run it off the tractor hydraulic system. I need to add power beyond, so do I just tee into the line by the brake valve for my pressure line and add another line to the filter housing for my return line? Both lines would be connected to quick couplers on the other end to operate the backhoe. What size lines would you recommend ? Are all 3 pt backhoes closed center valves? It does need to be closed center right? Thanks for anyones help in advance, great place to get that accurate info.
 
I wouldn't. A backhoe needs a lot of hydralics.A friend did that. The tractor didnt have enough flow. He ended up putting on a 'Farmhand' style PTO pump.Now he has all the hydralics he needs.
 
You need to do some research on your pump output. I agree with DeltaRed, you may not have the flow to make the backhoe work well, without a dedicated pump of adequate output. steve
 
We had a Howard Power Arm three point backhoe, new back about 1970. It had its own hydraulic system. It was open center system. I assume most of them would be. My IH 3444 TLB and my Ford 655A TLB both had/have open center systems.
 
Why don't you just plug it in to the remotes, block the lever and see if you can run it before you go to any more trouble or expense?
 
My charts show the 4020 has a 21 gpm pump which should be enough flow but also shows 2250 psi which might be a little high for a three point unit. If you decide to run it off your system.
 
I'd use a PTO pump. You could also cheat and use the 540 pump with an adapter on the 1000 shaft, then not need to have the engine running fast anymore. 1100/1200 RPM would be plenty using the 1000 shaft.
 
Thanks for everyones input, I wanted to go with the self contained backhoe, and now I will. They are just harder to come by used then the ones that run off tractor hydraulics that is why I was inquiring about power beyond. Glad I ask for your input on this. Has anyone converted a backhoe to a pto pump. Would need pump,tank, filter, relief valve etc. ?
 
With a good little bit of planning, you could build a system using the PTO pump the way Dieseltech is describing. Pump, tank and hoses to your Backhoe controls. A backhoe moves a lot of oil, so get a tank big enough to dissipate the heat, or add an oil cooler to your planned system. Sounds like an open center system to me. If you get a good clean tank, put your filter on the return side of the system. They do make high pressure filters, but they are not cheap, nor easy. Good luck. Sounds like a fun project. steve
 
Yes. My friend did that on his 4020. You will need a pump;A reservoir;adequet hoses. As for the relief,it might be in the valve stack. If so a seperate relief wont be needed.
 
I would guess most 3-point backhoes are open center. Your 4020 is closed center, so you would need to find one with closed center valving or find/purchase a closed center valve(s). A self-contained one would be best. As has been posted, a PTO pump and reservoir can make one self-contained fairly easily and may be more cost effective than changing valves.
 
The industrial version of a 4020 was the 600, but less than 900 were built. The industrial version of a 3020 was the 500. Both the 600 and 500 were available from the factory with a backhoe. Search the YT Deere archives for discussions about the 600 and backhoe.

https://www.youtube.com/watch?v=DGWy_GP8yuQ

https://en.john-deere-club.com/gallery_detail.php?id=82

https://www.tractordata.com/industrial-tractors/000/0/2/26-john-deere-600.html


The parts manual, operators manual and service manual for a 600 or 500 might be still be available from Deere or Ebay. 600s May be scarce, but a salvaged backhoe or a whole 600 with backhoe might be found. The mountings for the industrial version might tie into the rear axle or rear frame rather than the 3 point hitch. A 3 point hitch backhoe could damage a worn 3 point hitch or break the A-frame the 3 point hitch mounts on. For sure it would give the load and depth shaft bushings and seals a real workout.

Sounds like a fun project.
 

Ignore anyone suggesting a separate PTO pump , they have no clue .
As long as the SCV is not set to " single acting ". The 4020 has enough hydraulic capacity to operate two backhoes at the same time , with capacity to spare .
Valves have to be closed centre .
 

I didn't say a thing about the hydraulic capacity of a 4020. My point with using a self-contained was unless he finds one with a closed center valve arrangement it may be more cost effective to get, or make, a self-contained one than to replace the existing open center valves properly.
 
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