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Old 03-06-2015, 11:30 PM
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Default Need to build hydraulic reservoir

I have this Haldex Barnes GC9000 hydraulic power unit that I would like to use on my bender conversion. The only problem is that it does not have a reservoir. It has a flange that fits over the oring on the motor adapter, but it fits too loose to seal. I rhink it may be a compression sleeve for a plastic tank, but not sure. The replacement tank cost is more than I paid for the pump, $175. So I need to build a tank.

The pilot for the tank is 6.5". I was hoping to find some tube to make it out of, but have not had any luck. I have considered rolling a sheet metal tube, but my roller leaves a slight deformation every 3 or 4 inches, so it is not a smooth roll. I could hammer and dolly out the flaw if I had to, just not thrilled about it. If I cut a piece of plate out I would need to make the flange with the hole 3/8" to mate with the oring, then weld a tank to it.
Does anybody have any better ideas?
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Old 03-07-2015, 12:13 AM
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http://www.surpluscenter.com/Hydraul...ck-Reservoirs/

Get the 2qt one for $20 and cut it in half, add some tube in the center to make it the right length. Prob solved.
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Old 03-07-2015, 12:41 AM
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Looked at those first thing. The only problem is they have a 4" opening. The can itself is no problem, its the sealing surface that is bothering me.
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Old 03-07-2015, 12:53 AM
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Ahh, I didn't see those specs, sorry. Nothing on egay either huh?

What about a remote tank and run hoses to and from the pump. I see the return line is threaded, is the suction line threaded? Can it be?
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Old 03-07-2015, 02:32 AM
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These reservoirs are supposed to fit the GC9000. Is this what you're after, or can they be modified for your use?
https://www.hydraulic-supply.com/com...al_M_50956.htm
https://www.hydraulic-supply.com/com...VOIR_50978.htm
https://www.hydraulic-supply.com/com...VOIR_50983.htm
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Old 03-07-2015, 08:53 AM
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Can't you just make a flange and seal with a gasket?
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Old 03-07-2015, 10:47 AM
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Walker, that unit looks as if it was originally in a square tank, with the motor mounted vertically, instead of a having a round tank bolted to it. The suction pipe comes out straight, not angled down to the bottom of the tank.
Mounting it vertically instead of horizontally would definitely be easier, as the adapter would not have to seal in hydraulic oil since it would be above the level of the oil.
Than you could plasma cut a mounting plate and seal it with a gasket instead of an o-ring.
Make the top of the tank bolt on, as the holes in the motor adapter look to be drilled and tapped. Then if there is a problem in the future you can lift the pump assembly out of the reservoir without having to drain the tank.
Dan.
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Old 03-07-2015, 11:56 AM
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Yes, I am going to mount it vertically. I have thought of cutting out a flange. Still would need to roll a neck, as there is not much room for the bolts.
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Old 03-07-2015, 12:13 PM
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Walker I would design the reservoir to give me enough room on the top plate for the filler breather strainer unit, a dipstick port and the power unit's mounting flange, and have the room around the edge of the plate to bolt it down to a flange on the reservoirs tank. This design eliminates the rolled neck. The top plate bolts to the PU then bolts to the tank
Dan.
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Old 03-07-2015, 03:25 PM
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This would work using a square tank with long bolts, just a thought.
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