Adding aux. hyd. pump to JD A

~The next easiest thing is a PTO powered pump, with the correct pump it will give you most of the pressure & flow you need & it is easy to install� The down side of that is, it won't be live power & can interfere with the PTO usage.

~Seeing as you already have a pump, the easiest thing to do with that is to build a bracket to hold the pump to the frame or tractor side & power it with 2 or 3 matched belts riding on the outside of the belt pulley. [I have built quite a few of these & they work well & are easy to fabricate]. The down side of this option is still no live power.

~If you want to use your pump & must have live power there is the option of fabricating a pump drive pulley set up on the flywheel & running the pump all the time the engine is running. Depending on if you have a covered flywheel & the speed your pump must turn at, the fabrication can be rather complicated & cumbersome & if the pump is a high pressure & volume will need 2-3 belts to power it.

~The fan shaft option is probably not a reliable option if you need anything more than a low pressure, low flow, intermittent use setup.

~When you figure out what you want to do let us know how it turn out..

1) As you say, the power trol wouldnt be live, but it has plenty of PSI and flow rate and if you get the easy to change flow insert plugs (rock shaft to remote) its not all that bad to change from rock shaft to remote operation. On my 70, I had the rear power trol plug insert with the removeable cover cap and knurled nut you turned to switch from remote to rock shaft and that was a piece of cake. Im not sure, but think you can get the same on that A.

2) I fear that drivign it off the fan shaft (if it requires a lot of pSI and flow) may add too much torque load to the fan shaft/governor shaft bevel gears and fan shaft drive which are already prone to failure, althoug after many successful years before they develop problems.

3) Belt Drives: Its very possible to drive some of those low volume power steering type automotive hydraulic pumps by belt via the fan shaft (Ive sure done it) but Im not sure of the flow rate and pressures are adequate to do your job????? While they also load the fan shaft and bevel gears as above, I dont think their ratigns are all that much as what you may need.

4) The governor driven pumps. While many of those were used to power the old Behlen after market power steerign units, Ive seen them successfully and long used to power loaders and they seem to have plenty PSI and sufficient flow rate for that application. Ther are live, of course, and since driven right off the governor shaft end, they dont bother that bevel gear issue as above.

5. Ive seen plenty PTO and they are often high pressure and volume, only disadvantage I see is not live. Also, unles it has some sort of pass through and PTO extender mechanism (which I doubt) as you said it ties up the PTO. However, does the quippment you are gonna use require PTO ?? (What reservoir would you utilize??)

NOTE: The flow rate and pressure requiements of your application is the more precise determining factor here, sorry I dont have any specs on the pumps or your requirements to better assist you, and Im electrical, not mechanical engineering schooled also.

Good Luck and God Bless America Ol John T Nordhoff in Indiana