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Massey Harris & Massey Ferguson Tractors Discussion Forum

mounting a hydraulic pump on the front of the engine

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Tom Whitehead

06-24-2007 22:16:18

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hi folks,
I've got an old Massey Harris 50 that I'm going to put a hydraulic pump on the front of the motor. it has the Continental Z134 gas engine.I had always thought that if you put a straight drive coupling without any side loading that you could pull a fair amount of horsepower off of that end of the engine. But when I called up to the hydraulic outfitters the guy there cautioned me very sternly. Said I was asking for trouble and then I could snap a crankshaft. So I was wondering if anybody had any factory figures for that kind of system. I know it's very typical for a front end loader to run that way and I've never heard of anybody having any problem with them. I'm thinking that the typical front end loader pump would run about 8 GPM at 2000 psi. I'm planning to mount a 13 gallon per minute pump. So at 1800 rpm and 2000 psi that would suck pretty close to 26 hp. Although I doubt if I would actually use anywhere near that much. Any advice would be appreciated.
Thanks, Tom

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Tom Whitehead

06-26-2007 18:27:20

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Re: mounting a hydraulic pump on the front of the engine in reply to Tom Whitehead, 06-24-2007 22:16:18

thanks Gerald,
I'm pretty sure I can get it, I looked at it little closer today. It looks like if I can move the steering arm over about 2 inches, then everything will clear. From reading the manual I've got what they call a blind spline on the top. What they do is they cut all of the splines except for one, and then do the same on the mating part. So if I go in there with the needle file I can cut that last spline, and then I can put the arm wherever I want it. I've got all kinds of adjustments on the tie rod ends. As far as putting the drive coupling on, that's probably not going to be a problem. I've got a couple of lathes and although I was thinking of using a chain coupling right next to the motor I may reconsider. I don't think I have any hexagonal couplings, but I may be able to round up a spline (no pun intended), or maybe just put a key way in. I had a couple of guys come over today to help with some of my other projects so I didn't even look at the tractor except for the steering.these guys are really funny, out of every five times that they say they're going to come over, they might make it once. So I figure when I do get them I ought to work the heck out of them.
Best wishes, Tom

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Tom Whitehead

06-25-2007 19:23:09

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Re: mounting a hydraulic pump on the front of the engine in reply to Tom Whitehead, 06-24-2007 22:16:18

thanks Gerald, thanks Chuck,

I hadn't thought about the steering system, it's kind of tucked away and not very obvious. I just went out and took a quick look at it, there's probably some way to move it over but I'll have to look at it really closely. Boy, they sure don't give you much room there. There is just barely enough room to pull the crank pulley so when I put the drive coupling on I'll probably have to put the crank pulley back on, then bolt on the chain coupling, then assemble the other half, and then put the chain on. But I don't guess there is any other way to do it, other than going off the front of the engine that is. I have a loader on the tractor right now, it runs off of the tractors hydraulics. It's a real pain in the you know what because you can't crowd into a gravel pile by slipping the clutch and lifting at the same time. Oh well, I'll figure it out.
Thanks again, Tom

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Gerald J.

06-25-2007 20:33:31

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Re: mounting a hydraulic pump on the front of the engine in reply to Tom Whitehead, 06-25-2007 19:23:09

The crankshaft pulley on my MF-135 was machined with a decent sized hole and with four threaded holes in the face outside that. I acquired a pulley with a 1" or maybe 3/4" hex hole and I turned that to fit the front of the crankshaft pulley with holes to line up with those four bolt holes. It probably isn't more than an inch front to back. I turned the hex off the shaft where it goes through the pivot pin and fits into the spider coupling at the pump that sits on a shelf bolted to the front of the front axle support. I notched the lower radiator shroud to clear the pump. I adjusted the pump position to minimize the misalignment of the shaft at the hex fitting. It worked fine, but I've moved that loader to a larger tractor where it works much better. The MF-135 wasn't enough tractor for the MF-236 loader.

Shaft couplings I've seen used for Ford tractors were flat steel springs to take up minimum axial space and still give flexibility. Kind of a spider type flexible section.

Gerald J.

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Gerald J.

06-25-2007 09:25:50

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Re: mounting a hydraulic pump on the front of the engine in reply to Tom Whitehead, 06-24-2007 22:16:18

I think the crankshaft pulley adapters that have been commercially made had a flex coupling at the crankshaft end. When I made mine I made that coupling with a hex hole and stuck in a shaft with a hex end giving a bit of flexibility and then aligned the pump shaft carefully and used a flexible spider coupling at the pump. Worked fine.

I don't know about the steering rod conflicting with that shaft. My experience is with a MF-135. I suppose one could add some bends to the rod to make it clear all the time in all positions, including one front wheel high to its limits.

Gerald J.

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Chuck Bergstrom

06-25-2007 08:24:13

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Re: mounting a hydraulic pump on the front of the engine in reply to Tom Whitehead, 06-24-2007 22:16:18

Hi Tom, The front of crankshaft is normally a
good place to drive a pump. The 50 however will
not steer very sharp to the left with a pump
shaft thru the front. The steering arm crosses
by the hole so you are very limited. You can
check by having someone steer while you watch
the arm come by and determine how sharp you can
steer. Good luck, Chuck

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