Hydraulic Pump

how efficient is a hydraulic pump and hydraulic motor?

how efficient is hydraulic motor connceted to a hydraulic pump so the pump runs the motor. what kind of losses are there? is there a different lose at different speeds

If the components are new, the circuit will be relatively efficient. Inefficiency will be a function of leakage in the pump and motor.
The losses will go up with speed and load. The suppliers normally provide a graph that enables you to work out what the delivered power will be at a given load and speed setting.

Just a quick note about the above answer, liquids are compressible but at low pressures the compression is so low it can be virtually ignored. However in applications like fuel systems, operating at around 2000 bar, diesel is compressed to be 85% of its original volume.

Cub Cadet 1641 Garden Tractor Hydraulic Pump Lift Lines
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Cub Cadet Hydraulic Pump Sauer Danfoss SNP 1 78 S MA 10302539002 7000 Series
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CASE 448 446 Tractor Hydraulic Oil Pump Mount
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CASE 195 Tractor Hydraulic Oil Pump
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David Brown Replacement Hydraulic Pump  K916535
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CASE Ingersoll 4016 Tractor Hydraulic Oil Pump Stop Grommet Bumper
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NEW HYDRO GEAR HYDRAULIC PUMP PG 1JQQ DY1X XXXX BDP 10A 319 BDP 10A 305
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IH 3200B WISCONSIN VH4D HYDRAULIC PUMP
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Bolens Tube Frame Hydraulic Add On Kit Pump Mounting Bracket 1722473 Gear Lift
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Jacobsen LF3400 LF3800 Hydrostatic transmission drive pump hydraulic diesel
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CASE 220 Tractor Hydraulic Oil Pump Mount
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SEAL KIT 70602 1 HYDRO GEAR OEM HGM E SERIES PUMP MOTOR TRANSAXLE
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Toro Hydraulic Pump 105 9770 NEW
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John Deere 2500 Diesel Hydraulic Pump
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Bolens Iseki TX1500 G172 Tractor KE75 17hp Diesel Engine Hydraulic Oil Pump Gear
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FAN 53994 HYDRO GEAR OEM HYDRAULIC PUMPS AND TRANSAXLES
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Kohler Parts Hydraulic Pump Adapter for 18 27HP Command Twi KO Adapter 2475509
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PUMP CHARGE 70924 KIT HYDRO GEAR HYDRAULIC OEM
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John Deere 140 300 312 314 317 Hydraulic Transmission Pump Hydro Pump
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1965 CASE Colt Super H Tractor Hydraulic Oil Pump Mount
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1965 CASE Colt Super H Tractor Hydraulic Oil Pump
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Case Ingersoll Tractor Lawn Mower 448 Hydraulic Oil Hose Pump to Tank
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Case Ingersoll Tractor Lawn Mower 448 Onan Engine Hydraulic Oil Pump Mount
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Case Ingersoll Tractor Lawn Mower 448 Hydraulic Oil Hose Pump to Valve
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JOHN DEERE HYDRAULIC DRIVE PUMP New in Box PART TCA12335
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Economy Power King 2418 Tractor Hydraulic Oil Pump Mount
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lawnmower hydraulic pump HYDRO GEAR PG 1BNQ DB1X XXXX 1 brand new
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BLOCK 70723 7 PISTON HYDRO GEAR hydraulic pumps  transaxles
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