### How To Calculate Hydraulic Pump and Motor

The equation for calculating the pump efficiency is expressed as follows: (5-42) EFF = ( 80 − 0.2855 H + 3.78 × 10 − 4 H Q − 2.38 × 10 − 7 H Q 2 + 5.39 × 10 − 4 H 2 − 6.39 × 10 − 7 H 2 Q + 4 × 10 − 10 H 2 Q 2 ) ( 1 100 )

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