Hydraulic pump ?s for mounting a Massey Ferg 220 Backhoe on my TD-6

My ? is this: I need a hydraulic pump with more power than the TD-6's engine mounted unit, and I don't know which would be best. I would like to use as much of the 34 hp that the TD-6 develops, if new, to run the backhoe pump. This means I need to optimise for the flow vs. pressure that the MF 220 Backhoe was designed for. I've come to understand that pressures where limited to 1500 psi or less on older hydraulic equipment, to which this certainly applies. However, all of its plumbing, o-ring connections, etc. and cylinders, look like stuff that would be rated for higher pressures. I'd love to know what psi and flow I should target the MF 220 for. I believe this backhoe was made primarily for the MF 200 crawler, does anyone know what its hydraulic pump specs were?

A this point, with what I know my solution is this: Given about one horse power required per 1 GPM flow at 1500 psi I think a Prince 21-spline 40 GPM 1000 RPM PTO pump would work perfectly but I am not sure. If I connect this pump through a PTO extension shaft (6-spline 1 3/8" female to 21-spline 1 3/8" male)connected to the TD-6 tranny's PTO output shaft which turns at about 850 RPM, the output of the 1000 RPM rated pump will decrease 15% to 34 GPM. At this flow I might be able to get 1500 psi. If I set the reliefs to 2000 psi or so, I am thinking that when I bog the hoe down, my engine will likewise bog, which will increase my torque, and therefore my psi will go up as my RPM and flow drops off. This will achieve good breakout force while having fast cycle times.

Does anyone know if I am thinking straight? Please inform.
And thank you very much, in advance.

I would go for a higher flow rate which will take less hp and might not bog the machine near as bad.

Ideas anyone on that?

I would mount on the top shaft. You will have to remove the rear access pannel from the transmission and use a coupling to mount the shaft to the top shaft. You will have to make a mounting plate with a hole drilled in line with the top shaft You should then mount a bearing and make an oil seal to hold the oil in. You will want to make a way to retain the bearing. IH did use what is called a shaft grove pin to hold the coupling together on some models. This will hold the shaft in place. This will permit the removal of the pump without having to take the whole shaft out and or if the coupling or something goes wrong internally you are less likely to have the whole a shaft banging against the ring and pinion gear.

To operate you put the trany in neutral, lock the brakes for saftety, engage the clutch and off you go. On the IH tranny the top shaft will rotate independantly of the gears. If you look at the tranny diagram the clutch input shaft is always a live connection to the top shaft.

Just like what they used to make from the factory.

My tractors are bigger than yours but around a 1500 psi max with 22-25 gpm will be sufficient to make it work fairly well.

Good luck and let me know how it goes.

wk

pump shaft to PTO shaft adapters, i.e., say a 14 spline pump male to a PTO 6 spline 1 3/8" male or female.

Also. Where to buy manufactured cylinder mounts? both swivel and plain pivot. It seems to me that there is good money to be made by some company in providing a complete array of premanufactured mounts. The only stuff I have come up with is 3PT hitch parts, and they take a lot of modifying.

I just found out that the MF 220 backhoe is a mid 1960s unit and rated for the low-mid 2000 psi range and flows of just over 20 GPM. This is preferable to a low psi unit to me but changes my plans somewhat.

And thanks Bill for the backup, I now know I was thinking straight in wanting to use the top tranny jack shaft. My TD-6 came used, with only the extension shaft part of the factory 540 RPM PTO. Installed in my bulkhead is a 1 3/8" shaft which is female coupled male 6 spline where it connects to the tranny inside the bulkhead, and bearing supported male 10 spline, again 1 3/8", receased at the rear of my bulkhead. As I can find no 10 spline adapters I am replacing this whole shaft with a conventional, though modified, 6 spline male to male extension. Luckily for me, I will save some time by reusing the factory PTO shaft bearing plate to which I will add a seal retainer. This will allow for a tight, easily serviced pump mount safely above my rippers and below my fuel tank. That is if I can locate a pump that provides the flow/psi I want at 862 RPM.

I'm not able to respond with suggestions, however
I will follow your progress because I would like to install a backhoe off a International 3414 onto my TD6 Bulldozer. I also thought about using some type of PTO pump to work the additional equipment.
Please email pictures of your project if possible.