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.

Fan kit 70998 HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
Fan kit 70998 HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
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Bypass valve 71248 KIT HYDRO GEAR OEM HYDRAULIC PUMP AND TRANSAXLE
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SHAFT KIT 71443 HYDRO GEAR OEM HYDRAULIC PUMP AND TRANSAXLE
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Breather kit 71510 HYDRO GEAR HYDRAULIC PUMP AND TRANSAXLE
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Seal kit 71554 HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
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GENUINE OEM MTD HYDRAULIC PUMP FOR LOG SPLITTER P N 918 04128 OR 718 04128
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MASSEY FERGUSON 175 TRACTOR AUXILIARY HYDRAULIC PUMP PART  531607M93
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Gravely 18G 08725000 Oildyne 12V Electric Hydraulic Pump 108AM10 CL IVT w hoses
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John Deere Zero Turn DUP10S Hydraulic Pump 717 727 737 757 647A 657A 667A
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Cub Cadet Hydraulic Pump Sauer Danfoss SNP 1 78 S MA 10302539002 7000 Series
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Jacobsen Turfcat 628d Mower Diesel deck 4 wheel drive hydraulic pump 2721334
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1972 Case 220 Garden Tractor  9646831 Part  Hydraulic Pump1 2 shaft
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1972 Case 220 Garden Tractor  9646831 Part  Hydraulic Pump Mount
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CASE 448 446 Tractor Hydraulic Oil Pump Mount
CASE 448 446 Tractor Hydraulic Oil Pump Mount
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Cub Cadet 21652185 HDS 2000 Series Hydrostatic Pump Hydro Hydraulic
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Ford Replacement Hydraulic Pump  F2NN3K514AA99M
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CASE Ingersoll 446 Tractor Hydraulic Oil Pump Mount Screws
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HYDRAULIC PUMP GASKET IH CUB LO BOY 154185184
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John Deere Kohler Hydraulic Pump Control Rod 110 112 AM32268
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Sears Garden Tractor Hydraulic Loader with mounting bracket and pump
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Jacobsen Turfcat T436G Continental R11 Hydraulic Pump Renault R08
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Seal kit 70492 HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
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Case Ingersoll Tractor Lawn Mower 446 Onan Engine Hydraulic Oil Pump Mount
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John Deere TCA19718 TCA17070 Hydraulic Pump off 8000 E Cut Fairway Mower 1150
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Wright Stander Hydraulic Pump  32410005
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Hydro Gear Hydraulic Pump BDP 10L 117
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Exmark Hydraulic Pump 103 2766
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John Deere 317 Garden tractor Hydraulic pump mounting bolts  spacers
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Case 220 Lawn tractor Hydraulic pump motor GOOD SHAPE C16697
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Cub Cadet 1863 Hydrostatic drive pump with ports for hydraulic lift
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John Deere 318 Main Hydraulic Pump Line AM39672
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Hydro Gear Hydraulic Pump BDP 10L 133P JOHN DEERE Z TRAC MOWER
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Ransomes mower 250 305 951D 4 wheel drive hydraulic transmission pump 178037
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Ransomes mower 951D 4 wheel drive hydraulic deck gear motor pump 2178181
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Cub Cadet 3204 Hydraulic Pump Torque Bracket
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SCHWEISS 1850 HYDRAULIC PUMPS
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Wheel Horse 520 H Tractor Unidrive Hydro Transaxle  Hydraulic Pump
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IH 3200B WISCONSIN VH4D HYDRAULIC PUMP
IH 3200B WISCONSIN VH4D HYDRAULIC PUMP
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IH 3200B WISCONSIN VH4D HYDRAULIC PUMP MOUNT
IH 3200B WISCONSIN VH4D HYDRAULIC PUMP MOUNT
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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
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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Transmission Transaxle Hydro Hydraulic Pump on John Deere 185 Top Fan
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John Deere 2500 Diesel Hydraulic Pump
John Deere 2500 Diesel Hydraulic Pump
$335.00
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Bolens Wheel horse Cub Cadet Hein Werner Hydraulic pump oil seal 1722038
Bolens Wheel horse Cub Cadet Hein Werner Hydraulic pump oil seal 1722038
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Case Ingersoll Front cut mower 5020V Hydraulic transmission  hydro pump LH
Case Ingersoll Front cut mower 5020V Hydraulic transmission hydro pump LH
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Case Ingersoll Front cut mower 5020V Hydraulic transmission  hydro pump RH
Case Ingersoll Front cut mower 5020V Hydraulic transmission hydro pump RH
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Bolens Iseki TX1500 G172 Tractor KE75 17hp Diesel Engine Hydraulic Oil Pump Gear
Bolens Iseki TX1500 G172 Tractor KE75 17hp Diesel Engine Hydraulic Oil Pump Gear
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Fan 53994 10 fin HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
Fan 53994 10 fin HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
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Brake arm 71087 LEFT LH 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
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Kohler Parts Hydraulic Pump Adapter for 18 27HP Command Twi KO Adapter 2475509
Kohler Parts Hydraulic Pump Adapter for 18 27HP Command Twi KO Adapter 2475509
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Exmark Hydraulic Pump 103 1942
Exmark Hydraulic Pump 103 1942
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Hydro Gear Hydraulic Pump PG 1GNP DY1X XXXX
Hydro Gear Hydraulic Pump PG 1GNP DY1X XXXX
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Toro Hydraulic Pump 103 1942
Toro Hydraulic Pump 103 1942
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Bush Hog Hydraulic Pump 99079
Bush Hog Hydraulic Pump 99079
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Hydro Gear Hydraulic Pump PL BGQQ DY1X XXXX
Hydro Gear Hydraulic Pump PL BGQQ DY1X XXXX
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Lesco Hydraulic Pump 24090
Lesco Hydraulic Pump 24090
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Kees Hydraulic Pump 101111
Kees Hydraulic Pump 101111
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Encore Hydraulic Pump 453087
Encore Hydraulic Pump 453087
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Housing 70272 62768 AXLE CARRIER HYDRO GEAR HYDRAULIC pump transaxle
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Spring kit 70873 RTN CW HVY HYDRO GEAR HYDRAULIC pump transaxle transmission
Spring kit 70873 RTN CW HVY HYDRO GEAR HYDRAULIC pump transaxle transmission
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Time Remaining: 8d 49m

Expansion plate 70868L HYDRO GEAR OEM HYDRAULIC pump transaxle
Expansion plate 70868L HYDRO GEAR OEM HYDRAULIC pump transaxle
$15.00
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Pump CHARGE 70924 KIT HYDRO GEAR HYDRAULIC OEM transaxle
Pump CHARGE 70924 KIT HYDRO GEAR HYDRAULIC OEM transaxle
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Scag Hydraulic Pump 48551
Scag Hydraulic Pump 48551
$499.00
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Hydro Gear Hydraulic Pump BDP 10L 117
Hydro Gear Hydraulic Pump BDP 10L 117
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Encore Hydraulic Pump 5207060
Encore Hydraulic Pump 5207060
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