Hydraulic question

Can I run 2 hydraulic pumps off the same fluid reservoir?

I'm ready to mount the PTO driven hydraulic pump on the belt pully drive of my Farmall M, but I think the tank I was going to use for the reservoir is going to be too small (it's a small square hydraulic reservoir that fits under the M's hood, for Bahlen power steering).

The front-loader currently operates off the M&W distributer pump, with the loader's reservoir in the loader's frame.
Can I simply "T" into the existing supply and return lines where they enter the loader's frame for this new pump?

I don't forsee using both pumps at the same time (if that makes any difference).
The loader has open center control valves, and I have another set of open center valves for the belt pully pump.

Thanks,
Spotted Horse

Two issues:
The reservoir should be the loader frame, not the under hood unit.
The Second issue is that the PTO pump is probably designed for 540RPM Maybe up to 700 if it is a good pump.
The Belt pulley will be in the area of 1200RPM and should be connected with a belt ratio of 2 to 1 reduction. Best of luck, Jim

I would consider converting the transaxle into a reservoir. Replace the gear oil with Hy-Tran or equivalent. Place a strainer, check valve, and tee at the rear drain plug or a safer remote location with a suction hose. The check valve might not be necessary. It depends how good your pumps are at holding a prime.

Despite what Jim says about the PTO pump, the Prince pump will easily handle 1200 RPM. The same pump is used with 1000 RPM PTO. The mfg changes out the internal splines to suit 540 or 1000 PTO shafts. I can't think of any small hydraulic gear pump that can't run at 2000-2500.

What are you going to use the belt pulley pump for? You under stand that whenever you push the clutch the belt pulley stops thus no live hyd. You already have live hyd. with the M&W pump. With the hyd. reservoir in the loader frame I would think that should be good. Armand

More issues: with two pumps,will a common supply cause one or tthe other to be 'starved',two pumps will create more heat.make sure you have enough oil volume to dissipate heat.the raer end idea sounds like it would work,get it CLEAN and make the seals will hold the thin oil.Ms hold around 13 gal.you can buy a diverter/priorityvalve for under $100,then the mag pump can do it all,providing it has enuogh gpm.lots tto tkink about,

I certainly think with a loader you would want "live hydraulics". Either the pto or belt pulley are not going to give you that. Driving a pump off the crankshaft would be better, but I don't know how easy that would be with an M. The reservoir in the loader is designed to be big enough for the loader and to dissipate the heat, so it makes sense to use it.

(quoted from post at 20:00:20 03/18/10) I would consider converting the transaxle into a reservoir. Replace the gear oil with Hy-Tran or equivalent. Place a strainer, check valve, and tee at the rear drain plug or a safer remote location with a suction hose. The check valve might not be necessary. It depends how good your pumps are at holding a prime.

Despite what Jim says about the PTO pump, the Prince pump will easily handle 1200 RPM. The same pump is used with 1000 RPM PTO. The mfg changes out the internal splines to suit 540 or 1000 PTO shafts. I can't think of any small hydraulic gear pump that can't run at 2000-2500.

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I think I lucked out today, I bought a tank off an old "farmhand" (the kind that has a frame around the tractor and a big hay basket). I'm not sure how much fluid the tank holds but probably at least 10 gallons.

(quoted from post at 03:35:27 03/19/10) What are you going to use the belt pulley pump for? You under stand that whenever you push the clutch the belt pulley stops thus no live hyd. You already have live hyd. with the M&W pump. With the hyd. reservoir in the loader frame I would think that should be good. Armand

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I plan to get 2 sets of 2-way hydraulic outlets out of all this. The M&W live pump is VERY slow on the loader, and I don't want to take the loader off the M.
I know the belt pully driven pump will not be "live", but I think it'll work OK for pulling implements with hydraulic cylinders, (and with a little practice and fancy foot-work :wink: ) I think I can even use it on my JD 510 roundbaler and Hesston PT-10 moco.

(quoted from post at 07:54:21 03/19/10) More issues: with two pumps,will a common supply cause one or tthe other to be 'starved',two pumps will create more heat.make sure you have enough oil volume to dissipate heat.the raer end idea sounds like it would work,get it CLEAN and make the seals will hold the thin oil.Ms hold around 13 gal.you can buy a diverter/priorityvalve for under $100,then the mag pump can do it all,providing it has enuogh gpm.lots tto tkink about,

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I've been concerned about the "starving and heating" issues myself. and bought a tank today from a neighbor for $10.00.

Thanks everyone for your replies, you have given me some great ideas and addressed many of my concerns with this project.