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.

Hydraulic reel pump for Jacobsen LF128
Hydraulic reel pump for Jacobsen LF128
$179.00
Time Remaining: 3h 43m
Buy It Now for only: $179.00

Housing 70272 62768 AXLE CARRIER HYDRO GEAR HYDRAULIC pump transaxle
Housing 70272 62768 AXLE CARRIER HYDRO GEAR HYDRAULIC pump transaxle
$218.00
Time Remaining: 15h 47m

Expansion plate 70868L HYDRO GEAR OEM HYDRAULIC pump transaxle
Expansion plate 70868L HYDRO GEAR OEM HYDRAULIC pump transaxle
$15.00
Time Remaining: 15h 47m

Spring kit 70873 RTN CW HVY HYDRO GEAR HYDRAULIC pump transaxle transmission
Spring kit 70873 RTN CW HVY HYDRO GEAR HYDRAULIC pump transaxle transmission
$53.29
Time Remaining: 15h 47m

Pump CHARGE 70924 KIT HYDRO GEAR HYDRAULIC OEM transaxle transmission
Pump CHARGE 70924 KIT HYDRO GEAR HYDRAULIC OEM transaxle transmission
$148.99
Time Remaining: 15h 47m

Oildyne 108 Series 12V Electric Hydraulic Pump 108AM32 for Gravely 18G
Oildyne 108 Series 12V Electric Hydraulic Pump 108AM32 for Gravely 18G
$269.99
Time Remaining: 18h 2m
Buy It Now for only: $269.99

Wheel Horse D 250 Tractor Hydraulic Oil Pump Mount
Wheel Horse D 250 Tractor Hydraulic Oil Pump Mount
$41.49
Time Remaining: 1d 10h 52m
Buy It Now for only: $41.49

Servo Piston Hydraulic Pump 98 3730 Toro ReelMaster 6500 D 6700 D Hydrostat 1586
Servo Piston Hydraulic Pump 98 3730 Toro ReelMaster 6500 D 6700 D Hydrostat 1586
$250.00
Time Remaining: 1d 14h 22m
Buy It Now for only: $250.00

Auxiliary Gear Hydraulic Pump 93 2175 off Toro ReelMaster 6500 D 1995 2001 1587
Auxiliary Gear Hydraulic Pump 93 2175 off Toro ReelMaster 6500 D 1995 2001 1587
$175.00
Time Remaining: 1d 14h 26m
Buy It Now for only: $175.00

GEAR HYDRAULIC PUMP Yanmar 3TN84 John Deere 870 955 Engine Takeuchi TB035
GEAR HYDRAULIC PUMP Yanmar 3TN84 John Deere 870 955 Engine Takeuchi TB035
$195.00
Time Remaining: 1d 17h 7m
Buy It Now for only: $195.00

Power King Economy Tractor Mower 1618 Hydraulic Oil Pump
Power King Economy Tractor Mower 1618 Hydraulic Oil Pump
$84.99
Time Remaining: 1d 17h 32m

Case Ingersoll Tractor Mower 446 Onan Engine Hydraulic Oil Pump Mount
Case Ingersoll Tractor Mower 446 Onan Engine Hydraulic Oil Pump Mount
$19.99
Time Remaining: 1d 17h 32m

Case Ingersoll Tractor Mower 446 Hydraulic Oil Pump
Case Ingersoll Tractor Mower 446 Hydraulic Oil Pump
$99.99
Time Remaining: 1d 17h 32m

Jacobsen Ransomes Textron fairway mower 250 auxiliary reel hydraulic pump
Jacobsen Ransomes Textron fairway mower 250 auxiliary reel hydraulic pump
$400.00
Time Remaining: 1d 18h 11m
Buy It Now for only: $400.00

Toro Zero Turn Z Master Z325 25hp Wheel Drive Motor HYDRAULIC PUMP CONTROL LEVER
Toro Zero Turn Z Master Z325 25hp Wheel Drive Motor HYDRAULIC PUMP CONTROL LEVER
$18.40
Time Remaining: 1d 18h 14m
Buy It Now for only: $18.40

John Deere 318 30 Hydraulic Tiller Belly Mount Pump Bracket
John Deere 318 30 Hydraulic Tiller Belly Mount Pump Bracket
$140.00
Time Remaining: 1d 19h 13m
Buy It Now for only: $185.00

Honda 5013 H5013 Lawn Tractor Hydraulic Pump  Control Valve Assy 90 1990 894
Honda 5013 H5013 Lawn Tractor Hydraulic Pump Control Valve Assy 90 1990 894
$199.99
Time Remaining: 2d 5h 49m
Buy It Now for only: $199.99

Hydrostatic Hydraulic Pump TCA19007 John Deere 3245C Mower 7500 8500 7700 3235C
Hydrostatic Hydraulic Pump TCA19007 John Deere 3245C Mower 7500 8500 7700 3235C
$250.00
Time Remaining: 2d 6h 35m
Buy It Now for only: $250.00

Drive Shaft to Hydraulic Pump TCA14022 to 2005 John Deere 3245C Mower 1234
Drive Shaft to Hydraulic Pump TCA14022 to 2005 John Deere 3245C Mower 1234
$95.00
Time Remaining: 2d 6h 35m
Buy It Now for only: $95.00

1969 CASE 222 Tractor Hydraulic oil Pump Mount Bolts
1969 CASE 222 Tractor Hydraulic oil Pump Mount Bolts
$6.63
Time Remaining: 2d 7h 27m
Buy It Now for only: $6.63

TORO Wheel Horse 269 H 72102 Hydraulic pump mounting bracket NICE 94 1747 03
TORO Wheel Horse 269 H 72102 Hydraulic pump mounting bracket NICE 94 1747 03
$15.00
Time Remaining: 2d 8h 29m
Buy It Now for only: $15.00

CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
$24.89
Time Remaining: 2d 8h 32m
Buy It Now for only: $24.89

Pump PG 3HCC NV1B XXXX HYDRO GEAR HYDRAULIC transaxle transmission
Pump PG 3HCC NV1B XXXX HYDRO GEAR HYDRAULIC transaxle transmission
$499.00
Time Remaining: 2d 14h 35m

Bolens Wheel horse Cub Cadet Hein Werner Hydraulic pump Pulley 1714792
Bolens Wheel horse Cub Cadet Hein Werner Hydraulic pump Pulley 1714792
$29.95
Time Remaining: 2d 14h 40m
Buy It Now for only: $29.95

simplicity 7117 kohler kt17s hydraulic pump linkage
simplicity 7117 kohler kt17s hydraulic pump linkage
$9.99
Time Remaining: 3d 5h 7m
Buy It Now for only: $9.99

John Deere 400 Hydraulic Transmission Pump I Have 2 Each Sold Separately
John Deere 400 Hydraulic Transmission Pump I Have 2 Each Sold Separately
$200.00
Time Remaining: 3d 8h 2m
Buy It Now for only: $200.00

Block cylinder 70723 7 PISTON HYDRO GEAR hydraulic pump transaxle transmission
Block cylinder 70723 7 PISTON HYDRO GEAR hydraulic pump transaxle transmission
$82.99
Time Remaining: 3d 11h 42m
Buy It Now for only: $82.99

Puck brake 44132 08617400 HYDRO GEAR 4 EA hydraulic pump transaxle transmission
Puck brake 44132 08617400 HYDRO GEAR 4 EA hydraulic pump transaxle transmission
$35.00
Time Remaining: 3d 11h 42m
Buy It Now for only: $35.00

Pump charge 70402 relief valveon 2ea Hydro Gear hydraulic transaxle transmissi
Pump charge 70402 relief valveon 2ea Hydro Gear hydraulic transaxle transmissi
$28.99
Time Remaining: 3d 11h 42m
Buy It Now for only: $28.99

Hub kit 72039 5 BOLT HYDRO GEAR OEM hydraulic pump transaxle transmission
Hub kit 72039 5 BOLT HYDRO GEAR OEM hydraulic pump transaxle transmission
$99.89
Time Remaining: 3d 11h 42m
Buy It Now for only: $99.89

Pump charge 2513027 HYDRO GEAR HYDRAULIC pump transaxle transmission
Pump charge 2513027 HYDRO GEAR HYDRAULIC pump transaxle transmission
$75.65
Time Remaining: 3d 11h 42m
Buy It Now for only: $75.65

VALVE PLATE 51444 BDP 10A 21543838 2EA HYDRO GEAR hydraulic pumps
VALVE PLATE 51444 BDP 10A 21543838 2EA HYDRO GEAR hydraulic pumps
$53.99
Time Remaining: 3d 11h 42m
Buy It Now for only: $53.99

John Deere 318 Tractor Hydraulic Hydro Transmission Rear Axle Oil Tube 1084
John Deere 318 Tractor Hydraulic Hydro Transmission Rear Axle Oil Tube 1084
$6.99
Time Remaining: 3d 16h 49m

Pair of Hydraulic Drive Pump Motor For Zero Turn Lawn Mower Hydro Gear
Pair of Hydraulic Drive Pump Motor For Zero Turn Lawn Mower Hydro Gear
$49.99 (1 Bid)
Time Remaining: 3d 17h 51m

1984 Case 448 Garden Tractor  14062524 Part  Hydraulic Pump1 2 Shaft
1984 Case 448 Garden Tractor 14062524 Part Hydraulic Pump1 2 Shaft
$79.99
Time Remaining: 3d 19h 21m
Buy It Now for only: $79.99

Case Ingersoll Garden Tractor Lawn Mower 226 Onan Hydraulic Oil Pump Mount
Case Ingersoll Garden Tractor Lawn Mower 226 Onan Hydraulic Oil Pump Mount
$24.99
Time Remaining: 4d 3h 30m
Buy It Now for only: $24.99

Case Ingersoll Tractor Lawn Mower 448 Hydraulic Oil Hose Pump to Valve
Case Ingersoll Tractor Lawn Mower 448 Hydraulic Oil Hose Pump to Valve
$19.99
Time Remaining: 4d 3h 30m
Buy It Now for only: $19.99

Case Ingersoll Tractor Lawn Mower 444 Kohler Engine Hydraulic Oil Pump Mount
Case Ingersoll Tractor Lawn Mower 444 Kohler Engine Hydraulic Oil Pump Mount
$19.99
Time Remaining: 4d 3h 34m
Buy It Now for only: $19.99

Case Ingersoll Garden Tractor Lawn Mower 446 Onan Engine Hydraulic Pump Mount
Case Ingersoll Garden Tractor Lawn Mower 446 Onan Engine Hydraulic Pump Mount
$24.99
Time Remaining: 4d 3h 34m
Buy It Now for only: $24.99

JOHN DEERE 425 445 455 HYDRAULIC TRANSMISSION PUMP CHECK VALVES FREE SHIPPING
JOHN DEERE 425 445 455 HYDRAULIC TRANSMISSION PUMP CHECK VALVES FREE SHIPPING
$100.00
Time Remaining: 4d 9h 32m
Buy It Now for only: $100.00

John Deere Hydraulic Pump 737 757 TCA12525 Hydro Part
John Deere Hydraulic Pump 737 757 TCA12525 Hydro Part
$635.00
Time Remaining: 4d 10h 56m
Buy It Now for only: $635.00

Jacobsen Ransomes Textron fairway mower auxiliary reel hydraulic pump
Jacobsen Ransomes Textron fairway mower auxiliary reel hydraulic pump
$75.00
Time Remaining: 4d 17h 32m
Buy It Now for only: $75.00

Toro Groundsmaster 3000D Contour 82 Hydraulic Pump 98 5156 Groundmaster
Toro Groundsmaster 3000D Contour 82 Hydraulic Pump 98 5156 Groundmaster
$399.99
Time Remaining: 4d 17h 34m
Buy It Now for only: $399.99

MTD HYDRAULIC PUMP FOR LOG SPLITTER P N 918 04127 718 04128 11 gpm
MTD HYDRAULIC PUMP FOR LOG SPLITTER P N 918 04127 718 04128 11 gpm
$119.00
Time Remaining: 4d 18h 59m
Buy It Now for only: $119.00

Cub Cadet hydraulic lift pump
Cub Cadet hydraulic lift pump
$139.95
Time Remaining: 4d 20h 5m

Toro Groundsmaster Reelmaster Hydraulic Stack Pump Danfoss Webster 49913 49913
Toro Groundsmaster Reelmaster Hydraulic Stack Pump Danfoss Webster 49913 49913
$415.00
Time Remaining: 5d 2h 3m
Buy It Now for only: $415.00

Toro Groundsmaster Reelmaster Hydraulic Stack Pump Webster Danfoss 49913 75 0800
Toro Groundsmaster Reelmaster Hydraulic Stack Pump Webster Danfoss 49913 75 0800
$415.00
Time Remaining: 5d 2h 7m
Buy It Now for only: $415.00

Husqvarna P ZT Hydraulic Pump Replacement Belt 576667201
Husqvarna P ZT Hydraulic Pump Replacement Belt 576667201
$49.95
Time Remaining: 5d 7h 32m
Buy It Now for only: $49.95

CASE 224 14HP KOHLER K321 HYDRAULIC PUMP MOUNT
CASE 224 14HP KOHLER K321 HYDRAULIC PUMP MOUNT
$19.99
Time Remaining: 5d 7h 40m
Buy It Now for only: $19.99

NEW HYDRAULIC PUMP OPENING GASKET FITS IH INTERNATIONAL FARMALL CUB C60 C 60
NEW HYDRAULIC PUMP OPENING GASKET FITS IH INTERNATIONAL FARMALL CUB C60 C 60
$9.00
Time Remaining: 5d 7h 50m
Buy It Now for only: $9.00

John Deere Hydro Pump TCA18087 647A 657A 667A 717A 727A 737 757 Hydraulic Part
John Deere Hydro Pump TCA18087 647A 657A 667A 717A 727A 737 757 Hydraulic Part
$725.00
Time Remaining: 5d 9h 59m
Buy It Now for only: $725.00

New OEM Genuine Toro 90 Degree Hydraulic Fitting Z Master Hydro Pumps P1 633605
New OEM Genuine Toro 90 Degree Hydraulic Fitting Z Master Hydro Pumps P1 633605
$18.65
Time Remaining: 5d 12h 10m
Buy It Now for only: $18.65

JOHN DEERE 112 110 HYDRAULIC LIFT PUMP CYLINDER n1
JOHN DEERE 112 110 HYDRAULIC LIFT PUMP CYLINDER n1
$75.00
Time Remaining: 5d 19h 11m

CASE Ingersoll 224 Hydriv Tractor Hydraulic Oil Pump Mount
CASE Ingersoll 224 Hydriv Tractor Hydraulic Oil Pump Mount
$16.59
Time Remaining: 6d 8h 34m
Buy It Now for only: $16.59

Wheelhorse Hydraulic Pump Motor
Wheelhorse Hydraulic Pump Motor
$40.00
Time Remaining: 6d 15h 8m
Buy It Now for only: $40.00

Pump charge 70622 KIT Hydro Gear hydraulic transaxle transmission
Pump charge 70622 KIT Hydro Gear hydraulic transaxle transmission
$129.89
Time Remaining: 6d 16h 4m
Buy It Now for only: $129.89

Shaft 2003020 HYDRO GEAR HYDRAULIC pump transmission transaxle
Shaft 2003020 HYDRO GEAR HYDRAULIC pump transmission transaxle
$70.00
Time Remaining: 6d 16h 4m
Buy It Now for only: $70.00

Shaft 62877 62877 44775 45045 HYDRO GEAR OEM HYDRAULIC pump
Shaft 62877 62877 44775 45045 HYDRO GEAR OEM HYDRAULIC pump
$139.29
Time Remaining: 6d 16h 4m
Buy It Now for only: $139.29

Fan pulley 72134 21543736 79243 HYDRO GEAR hydraulic pump transaxle transmissio
Fan pulley 72134 21543736 79243 HYDRO GEAR hydraulic pump transaxle transmissio
$44.00
Time Remaining: 6d 16h 4m
Buy It Now for only: $44.00

GRAVELY PROMASTER 30 H FRONT MOWER TRANSAXLE W HYDRAULIC PUMP  DRIVE LINKAGE
GRAVELY PROMASTER 30 H FRONT MOWER TRANSAXLE W HYDRAULIC PUMP DRIVE LINKAGE
$750.00
Time Remaining: 6d 16h 33m
Buy It Now for only: $750.00

Mitsubishi r1500 tractor diesel Hydraulic Pump Rare
Mitsubishi r1500 tractor diesel Hydraulic Pump Rare
$89.99
Time Remaining: 6d 18h 16m
Buy It Now for only: $89.99

CASE 155 Tractor Hydraulic Oil Tube Pump To Transmission
CASE 155 Tractor Hydraulic Oil Tube Pump To Transmission
$17.99
Time Remaining: 6d 20h 9m
Buy It Now for only: $17.99

Parker Hydraulic Pump H110A2013D
Parker Hydraulic Pump H110A2013D
$200.00
Time Remaining: 7d 8h 8m
Buy It Now for only: $200.00

STEINER TRACTOR HYDRAULIC PUMP PART 21 078 415 420 430 BRAND NEW
STEINER TRACTOR HYDRAULIC PUMP PART 21 078 415 420 430 BRAND NEW
$1,100.00
Time Remaining: 7d 8h 8m
Buy It Now for only: $1,100.00

Gravely Tractor Hydraulic Lift Pump 800 8000 G Series P N 18813 08900900
Gravely Tractor Hydraulic Lift Pump 800 8000 G Series P N 18813 08900900
$129.99
Time Remaining: 7d 8h 14m
Buy It Now for only: $129.99

Parker Hydraulic Pump H110B 18050
Parker Hydraulic Pump H110B 18050
$200.00
Time Remaining: 7d 8h 24m
Buy It Now for only: $200.00

Parker Hydraulic Pump 18051
Parker Hydraulic Pump 18051
$200.00
Time Remaining: 7d 8h 28m
Buy It Now for only: $200.00

John Deere F620 hydraulic pump lever AM123919
John Deere F620 hydraulic pump lever AM123919
$20.00
Time Remaining: 7d 8h 58m
Buy It Now for only: $20.00

Shaft 71249 5 8 INCH KEYED HYDRO GEAR OEM HYDRAULIC pump and transaxle
Shaft 71249 5 8 INCH KEYED HYDRO GEAR OEM HYDRAULIC pump and transaxle
$128.00
Time Remaining: 7d 9h 1m
Buy It Now for only: $128.00

Shaft 70580 PUMP HYDRO GEAR OEM HYDRAULIC pump transmission transaxle
Shaft 70580 PUMP HYDRO GEAR OEM HYDRAULIC pump transmission transaxle
$140.00
Time Remaining: 7d 9h 1m
Buy It Now for only: $140.00

Shaft 70763 HYDRO GEAR HYDRAULIC pump transmission transaxle
Shaft 70763 HYDRO GEAR HYDRAULIC pump transmission transaxle
$118.16
Time Remaining: 7d 9h 1m
Buy It Now for only: $118.16

Motor shaft 2003032 HYDRO GEAR BD 10 hydraulic pump transaxle transmission
Motor shaft 2003032 HYDRO GEAR BD 10 hydraulic pump transaxle transmission
$69.29
Time Remaining: 7d 9h 1m
Buy It Now for only: $69.29

Shaft 71283 IIT SPLINE PUMP HYDRO GEAR HYDRAULIC pump transmission transaxle
Shaft 71283 IIT SPLINE PUMP HYDRO GEAR HYDRAULIC pump transmission transaxle
$149.00
Time Remaining: 7d 9h 1m
Buy It Now for only: $149.00

Shaft 70620 PUMP HYDRO GEAR OEM 15MM KEYED HYDRAULIC pump transmission transaxle
Shaft 70620 PUMP HYDRO GEAR OEM 15MM KEYED HYDRAULIC pump transmission transaxle
$138.90
Time Remaining: 7d 9h 1m
Buy It Now for only: $138.90

Hub kit 72073 21543888 HYDRO GEAR hydraulic pump transmission transaxle
Hub kit 72073 21543888 HYDRO GEAR hydraulic pump transmission transaxle
$56.00
Time Remaining: 7d 9h 1m
Buy It Now for only: $56.00

Shaft kit 71443 Hydro Gear Hydraulic pump transaxle transmission
Shaft kit 71443 Hydro Gear Hydraulic pump transaxle transmission
$32.00
Time Remaining: 7d 9h 1m
Buy It Now for only: $32.00