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CA Supplemental Hydraulic Pump Sizing
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dfwallis View Drop Down
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Joined: 09 Mar 2023
Location: DFW
Points: 622 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Topic: CA Supplemental Hydraulic Pump Sizing
    Posted: 11 hours 23 minutes ago at 3:12pm
What would be a proper target GPM size for a supplemental hydraulic pump for a CA (given limited horsepower)?  10GPM?  15GPM? ?  (10GPM ~ 11HP at 2000PSI per one online calculator that I don't really trust)
1952 CA13092
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20437 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 11 hours 3 minutes ago at 3:32pm
Depends on the diameter(s) of the cylinders you are going to use. Depends on the system pressures and how much you intend to lift. Depends on if the engine is going to run 2000 RPM most of the time you are activating the hydraulics or 1000 RPM. Depends on what YOU think the lifting speed should be. Whatever you'd do with a tractor that size and cylinders of 2 inch diameter max (1 1/2" might be more suited) 10 GPM will be lightning fast at full throttle.  A 400 series loader has a 10-12 GPM front pump and it will lift the loader boom from the ground to full height in 3 seconds !!! and that's filling TWO boom cylinders. Personally, I'd want 5 GPM and no more at full throttle.
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dfwallis View Drop Down
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Joined: 09 Mar 2023
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Points: 622 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 10 hours 56 minutes ago at 3:39pm
It will likely max out about 1200-1500 RPM.  I intend to select a low-ish RPM pump and gear it accordingly.  Probably no larger than 2-2.5 inch cylinders, ~2000PSI.  
1952 CA13092
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Stan R View Drop Down
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Joined: 03 Dec 2009
Location: MA
Points: 960 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Stan R Quote  Post ReplyReply Direct Link To This Post Posted: 8 hours 47 minutes ago at 5:48pm
I'd suggest just direct coupling to the engine (crank shaft or belt) or pto and not deal with any gearbox (extra cost, more hp loss, bulkier system...).

Flow is somewhat proportional to the rpm. Which way are you planning on powering the pump.
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