Backhoe Cylinder

How to calculate required GPM for hydraulic pump?

Looking to get a PTO driven hydraulic pump to run a 3pt backhoe on my tractor. How do I go about figuring out what size I need. The backhoe has fairly large cylinders on it. They are may be 2x larger than the ones on the loader which runs off the internal system and it operates very slow. It seems that common pto pumps come in 11 or 21 GPM. That seems to be quite a spread so I would like to get the correct one the first time. The tractor is rated at 40hp so I should have plenty of power at any RPM.

You determine it by calculating the volume of your cylinders and hydraulic hoses. Then decide how many times per minute you want your oil circulated and cooled based on how hard you intend to work the hoe. The bigger pump will do the same work as smaller one, but not the other way around.

Fits 1807485K New Caterpillar Backhoes Stabilizer Cylinder Seal Kit 416D 420D +
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Hydraulic Seal Kit for Ford 555E Backhoe Boom Lift Cylinder
Hydraulic Seal Kit for Ford 555E Backhoe Boom Lift Cylinder
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Seal Kit for Ford 550 Backhoe Swing Cylinder 4 bore
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Seal Kit for New Holland 555E Backhoe Boom Cylinder
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Seal Kit for New Holland 555E Backhoe Swing Cylinder
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Hydraulic Seal Kit for Case 480C Backhoe Swing Cylinder
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Hydraulic Seal Kit for Case 480C Backhoe Boom Cylinder
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FD 85804740 Ford Backhoe Loader Bucket LH RH Cylinder Seal Kit 450C 555C +
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Seal Kit for John Deere 410E Backhoe Crowd stick dipper Hydraulic Cylinder
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Perkins 4236 4248 Forklift Jcb Backhoe Massey Tractor Loader Cylinder Head
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New Ford Tractor Loader Backhoe NH555 NH553 Complete Cylinder Head
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G109484 Backhoe Loader Lift Tilt Grapple Cylinder Seal Kit 480C 580C
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admin posted at 2011-6-19 Category: Heavy Equipment