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Harry Ferguson Tractors Discussion Forum
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What about......?

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Mark from the f

03-29-2008 20:15:59




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I'm sure they don't often get taken off, BUT.
what do most folks do with the front mount hydraulic pump on their tractors when they have removed the loader for an extended amount of time?
Do the pumps just pull out of the crank shaft adapter plate so easy that they remove the pumps?
Or can you plumb the pump so it just pumps fluid back into itself?
I assume you don'tjust want this little fella to run dry the whole time the tractor is running and there is no equipment hooked to it.
Gotta love these toys.....oh, brother!

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RegoR

03-31-2008 05:54:13




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 Re: What about......? in reply to Mark from the fort, 03-29-2008 20:15:59  
Hi Mark,

Mine has a set screw on either side of the coupling and I don't recall having too much difficulty backing them out to slip the pump off.

Roger



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Jerry/MT

03-30-2008 16:54:59




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 Re: What about......? in reply to Mark from the fort, 03-29-2008 20:15:59  
I don"t think you really want to couple the hoses together because that will cause the small ammount oil remaining in the lines to repeatedly have a small ammount of work to be done on it which will raise it"s temperature. (1 hp = 0.707 BTU/sec= 42.4 BTU/min so if you know the specific heat of the oil you can do a quick calculation of how long it will take to reach a given temperature.) If it reaches a high enough temperature it can cause some "coking" (carbon formation as the oil disociates).

If you have to keep the pump hooked up, it would be best to hook the pressure line to the reservior so that you recirculate a large quantity of oil and the bulk temperature rise will generally be relatively small.

If your reservior is on the loader frame, then I would suggest you you might couple the fittings together and monitor the hose and pump housing to make sure that you don"t raise the temperatures of the pump and fluid too high(< 150-200F would be my guess) and there by cause some damage and contamination in the pump.

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John(UK)

03-30-2008 03:10:50




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 Re: What about......? in reply to Mark from the fort, 03-29-2008 20:15:59  
If you do use couplings like Gerald suggests, do make sure that they are as big as possible if the Pump is of high capacity as it will heat up the oil passing the through the couplings, and avoid any right angle bends, always use swept bends as that causes heat problems too, it does of course depend on how much oil you are pumping, up to about 5gpm would be ok after that you need to watch it, no use asking for trouble, hydraulics are expensive enough....John

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Gerald J.

03-29-2008 20:48:35




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 Re: What about......? in reply to Mark from the fort, 03-29-2008 20:15:59  
I plumbed mine with matching male and female hose couplers (3/4" to minimize suction pressure drop) so I just coupled the hoses on the pump together and let it spin. Didn't seem to cause any problem.

And with the male and female couplers on the loader lines, there wasn't any confusion which one went where and when the loader was off, I didn't need any rubber caps for the couplers to keep them clean, the opposite coupler took care of that.

Gerald J.

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Mark from the fort

03-31-2008 05:14:52




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 Re: What about......? in reply to Gerald J., 03-29-2008 20:48:35  
I really like the opposite fittings on the connections. Do you have any pics of your set-up?
Thanks for your time to reply.Mark



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Gerald J.

03-31-2008 07:50:31




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 Re: What about......? in reply to Mark from the fort, 03-31-2008 05:14:52  
Didn't take any pictures and now its off the tractor. Probablly sitting on a shelf still assembled.

Gerald J.



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