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.

John Deere 318 hydraulic pump and rear end axle with hitch
John Deere 318 hydraulic pump and rear end axle with hitch
$99.99
Time Remaining: 37m
Buy It Now for only: $99.99

John Deere Hydraulic Hose Pump to Steering Box
John Deere Hydraulic Hose Pump to Steering Box
$12.99
Time Remaining: 3h 52m
Buy It Now for only: $12.99

CASE Ingersoll 4016 Tractor Hydraulic Oil Pump Stop Grommet Bumper
CASE Ingersoll 4016 Tractor Hydraulic Oil Pump Stop Grommet Bumper
$10.00
Time Remaining: 13h 47m
Buy It Now for only: $10.00

Husqvarna Brake Arm Kit EZT 539120079 RZ Hydraulic Pump Motor Brake
Husqvarna Brake Arm Kit EZT 539120079 RZ Hydraulic Pump Motor Brake
$19.95
Time Remaining: 19h 10m
Buy It Now for only: $19.95

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: 1d 5m
Buy It Now for only: $19.99

Case Ingersoll Tractor Lawn Mower 448 Onan Engine Hydraulic Oil Pump Mount
Case Ingersoll Tractor Lawn Mower 448 Onan Engine Hydraulic Oil Pump Mount
$24.99
Time Remaining: 1d 9m
Buy It Now for only: $24.99

Case Ingersoll Tractor Lawn Mower 448 Hydraulic Oil Hose Pump to Tank
Case Ingersoll Tractor Lawn Mower 448 Hydraulic Oil Hose Pump to Tank
$12.99
Time Remaining: 1d 9m
Buy It Now for only: $12.99

John Deere TCA18603 Hydraulic Hydrostatic Pump off 8000 E Cut Fairway Mower 1146
John Deere TCA18603 Hydraulic Hydrostatic Pump off 8000 E Cut Fairway Mower 1146
$995.00
Time Remaining: 1d 2h 13m
Buy It Now for only: $995.00

John Deere TCA19718 TCA17070 Hydraulic Pump off 8000 E Cut Fairway Mower 1150
John Deere TCA19718 TCA17070 Hydraulic Pump off 8000 E Cut Fairway Mower 1150
$225.00
Time Remaining: 1d 2h 13m
Buy It Now for only: $225.00

Pump BDP 10L 128P PL BGQQ DY1X XXXX 539101111 24090 PL6007 HYDRO GEAR HYDRAULIC
Pump BDP 10L 128P PL BGQQ DY1X XXXX 539101111 24090 PL6007 HYDRO GEAR HYDRAULIC
$489.00
Time Remaining: 1d 12h 52m

John Deere 317 Garden tractor Hydraulic pump mounting bolts  spacers
John Deere 317 Garden tractor Hydraulic pump mounting bolts spacers
$14.99
Time Remaining: 1d 17h 17m
Buy It Now for only: $14.99

Case 220 Lawn tractor Hydraulic pump motor GOOD SHAPE C16697
Case 220 Lawn tractor Hydraulic pump motor GOOD SHAPE C16697
$149.99
Time Remaining: 1d 19h 47m
Buy It Now for only: $149.99

SCHWEISS 1850 HYDRAULIC PUMPS
SCHWEISS 1850 HYDRAULIC PUMPS
$299.99
Time Remaining: 2d 11m

Ransomes mower 250 305 951D 4 wheel drive hydraulic transmission pump 178037
Ransomes mower 250 305 951D 4 wheel drive hydraulic transmission pump 178037
$1,995.00
Time Remaining: 2d 16h 6m
Buy It Now for only: $1,995.00

Ransomes mower 951D 4 wheel drive hydraulic deck gear motor pump 2178181
Ransomes mower 951D 4 wheel drive hydraulic deck gear motor pump 2178181
$395.00
Time Remaining: 2d 16h 23m
Buy It Now for only: $395.00

Cub Cadet 3204 Hydraulic Pump Torque Bracket
Cub Cadet 3204 Hydraulic Pump Torque Bracket
$49.50
Time Remaining: 2d 16h 37m
Buy It Now for only: $49.50

Case Ingersoll Mower Tractor Hydraulic pump
Case Ingersoll Mower Tractor Hydraulic pump
$29.99 (1 Bid)
Time Remaining: 3d 32m

John Deere 140 300 312 314 317 Hydraulic Transmission Pump Hydro Pump
John Deere 140 300 312 314 317 Hydraulic Transmission Pump Hydro Pump
$224.99
Time Remaining: 3d 11h 21m
Buy It Now for only: $224.99

IH 3200B WISCONSIN VH4D HYDRAULIC PUMP
IH 3200B WISCONSIN VH4D HYDRAULIC PUMP
$219.99
Time Remaining: 3d 14h 43m
Buy It Now for only: $219.99

IH 3200B WISCONSIN VH4D HYDRAULIC PUMP MOUNT
IH 3200B WISCONSIN VH4D HYDRAULIC PUMP MOUNT
$84.99
Time Remaining: 3d 14h 43m
Buy It Now for only: $84.99

Bolens Tube Frame Hydraulic Add On Kit Pump Mounting Bracket 1722473 Gear Lift
Bolens Tube Frame Hydraulic Add On Kit Pump Mounting Bracket 1722473 Gear Lift
$49.95
Time Remaining: 3d 15h 46m
Buy It Now for only: $49.95

Jacobsen LF3400 LF3800 Hydrostatic transmission drive pump hydraulic diesel
Jacobsen LF3400 LF3800 Hydrostatic transmission drive pump hydraulic diesel
$800.00
Time Remaining: 3d 18h 47m
Buy It Now for only: $800.00

CASE 220 Tractor Hydraulic Oil Pump Mount
CASE 220 Tractor Hydraulic Oil Pump Mount
$15.39
Time Remaining: 3d 21h 31m
Buy It Now for only: $15.39

SEAL KIT 70602 1 HYDRO GEAR OEM HGM E SERIES PUMP MOTOR TRANSAXLE
SEAL KIT 70602 1 HYDRO GEAR OEM HGM E SERIES PUMP MOTOR TRANSAXLE
$88.00
Time Remaining: 3d 21h 53m

Toro Hydraulic Pump 105 9770 NEW
Toro Hydraulic Pump 105 9770 NEW
$188.00
Time Remaining: 4d 46m
Buy It Now for only: $188.00

John Deere 2500 Diesel Hydraulic Pump
John Deere 2500 Diesel Hydraulic Pump
$335.00
Time Remaining: 4d 11h 59m
Buy It Now for only: $335.00

Bolens Wheel horse Cub Cadet Hein Werner Hydraulic pump oil seal 1722038
Bolens Wheel horse Cub Cadet Hein Werner Hydraulic pump oil seal 1722038
$14.00
Time Remaining: 4d 12h 28m
Buy It Now for only: $14.00

Case Ingersoll Front cut mower 5020V Hydraulic transmission  hydro pump LH
Case Ingersoll Front cut mower 5020V Hydraulic transmission hydro pump LH
$399.99
Time Remaining: 4d 16h 50m
Buy It Now for only: $399.99

Case Ingersoll Front cut mower 5020V Hydraulic transmission  hydro pump RH
Case Ingersoll Front cut mower 5020V Hydraulic transmission hydro pump RH
$399.99
Time Remaining: 4d 16h 50m
Buy It Now for only: $399.99

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
$65.99
Time Remaining: 5d 2h 44m
Buy It Now for only: $65.99

Hein Werner hydraulic pump Shaft Oil Seal Wheel Horse Cub Cadet Bolens etc
Hein Werner hydraulic pump Shaft Oil Seal Wheel Horse Cub Cadet Bolens etc
$6.99
Time Remaining: 5d 15h 5m
Buy It Now for only: $9.49

1965 CASE Colt Super H Tractor Hydraulic Oil Pump Mount
1965 CASE Colt Super H Tractor Hydraulic Oil Pump Mount
$19.24
Time Remaining: 5d 20h 5m
Buy It Now for only: $19.24

1965 CASE Colt Super H Tractor Hydraulic Oil Pump
1965 CASE Colt Super H Tractor Hydraulic Oil Pump
$76.99
Time Remaining: 5d 20h 7m
Buy It Now for only: $76.99

CASE 222 Tractor Hydraulic Oil Pump Mount w Bolts 220 224
CASE 222 Tractor Hydraulic Oil Pump Mount w Bolts 220 224
$10.00
Time Remaining: 6d 54m
Buy It Now for only: $10.00

Hydraulic Pump Case Ingersoll lawn tractor mower 220 222 224 444
Hydraulic Pump Case Ingersoll lawn tractor mower 220 222 224 444
$100.00
Time Remaining: 6d 1h 12m
Buy It Now for only: $100.00

HYDRO GEAR HYDRAULIC PUMP PG 1JQQ DY1X XXXX BDP 10A 319 BDP 10A 305
HYDRO GEAR HYDRAULIC PUMP PG 1JQQ DY1X XXXX BDP 10A 319 BDP 10A 305
$299.50
Time Remaining: 6d 2h 56m
Buy It Now for only: $299.50

WHITE HYDRAULIC VARIABLE DISPLACEMENT HYDRO PUMP 101010000001
WHITE HYDRAULIC VARIABLE DISPLACEMENT HYDRO PUMP 101010000001
$139.00
Time Remaining: 6d 2h 56m
Buy It Now for only: $139.00

Hydraulic reel pump for Jacobsen LF128
Hydraulic reel pump for Jacobsen LF128
$179.00
Time Remaining: 6d 9h 51m
Buy It Now for only: $179.00

CASE 222 Tractor Hydraulic Oil Pump Mount w Bolts 220 224
CASE 222 Tractor Hydraulic Oil Pump Mount w Bolts 220 224
$10.00
Time Remaining: 6d 12h 40m
Buy It Now for only: $10.00

JOHN DEERE HYDRAULIC DRIVE PUMP New in Box PART TCA12335
JOHN DEERE HYDRAULIC DRIVE PUMP New in Box PART TCA12335
$1,025.00
Time Remaining: 6d 16h 42m
Buy It Now for only: $1,025.00

Economy Power King 2418 Tractor Hydraulic Oil Pump Mount
Economy Power King 2418 Tractor Hydraulic Oil Pump Mount
$19.99
Time Remaining: 6d 17h 14m
Buy It Now for only: $19.99

Ingersoll garden tractor Hydraulic hose pump to valve C31966 3012 3014 3016 4016
Ingersoll garden tractor Hydraulic hose pump to valve C31966 3012 3014 3016 4016
$22.00
Time Remaining: 6d 17h 14m
Buy It Now for only: $22.00

lawnmower hydraulic pump HYDRO GEAR PG 1BNQ DB1X XXXX 1 brand new
lawnmower hydraulic pump HYDRO GEAR PG 1BNQ DB1X XXXX 1 brand new
$210.00
Time Remaining: 6d 18h 4m
Buy It Now for only: $210.00

JOHN DEERE 317 HYDRAULIC PUMP LINE METAL HYDRO
JOHN DEERE 317 HYDRAULIC PUMP LINE METAL HYDRO
$24.99
Time Remaining: 6d 19h 16m
Buy It Now for only: $24.99

FILTER 70723 HYDRO GEAR HYDRAULIC PUMPS AND TRANSAXLES
FILTER 70723 HYDRO GEAR HYDRAULIC PUMPS AND TRANSAXLES
$44.22
Time Remaining: 6d 20h 44m
Buy It Now for only: $44.22

CASE 195 Tractor Hydraulic Oil Pump Mount
CASE 195 Tractor Hydraulic Oil Pump Mount
$4.99
Time Remaining: 6d 22h 46m

Jacobsen Cushman Ryan 545370 Manual Hydraulic Pump Kit Oem New in box
Jacobsen Cushman Ryan 545370 Manual Hydraulic Pump Kit Oem New in box
$825.00
Time Remaining: 7d 2h 45m
Buy It Now for only: $825.00

Gravely Westchester Hydraulic Pump
Gravely Westchester Hydraulic Pump
$69.00
Time Remaining: 7d 13h 16m
Buy It Now for only: $69.00

CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
$29.99
Time Remaining: 7d 15h 29m
Buy It Now for only: $29.99

CASE Ingersoll 448 Tractor Hydraulic Oil Pump
CASE Ingersoll 448 Tractor Hydraulic Oil Pump
$99.99
Time Remaining: 7d 15h 30m
Buy It Now for only: $99.99

Kohler Command Ch18 CH23 CH25 CH 18 23 25 Hydraulic Pump Mount PTO
Kohler Command Ch18 CH23 CH25 CH 18 23 25 Hydraulic Pump Mount PTO
$75.00
Time Remaining: 7d 22h 44m
Buy It Now for only: $75.00

Toro Greensmaster 3000 Hydraulic Pump Greens Mower III IV
Toro Greensmaster 3000 Hydraulic Pump Greens Mower III IV
$174.99
Time Remaining: 7d 23h 22m
Buy It Now for only: $174.99

Toro Greensmaster III Hydraulic Pump Greens Mower 3000
Toro Greensmaster III Hydraulic Pump Greens Mower 3000
$174.99
Time Remaining: 7d 23h 22m
Buy It Now for only: $174.99

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: 8d 16m
Buy It Now for only: $19.99

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: 8d 16m
Buy It Now for only: $24.99

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: 8d 18m
Buy It Now for only: $24.99

John Deere 717 727 737 757 Hydro Hydraulic Pump JD Part Number D28228
John Deere 717 727 737 757 Hydro Hydraulic Pump JD Part Number D28228
$449.00
Time Remaining: 8d 12h 6m
Buy It Now for only: $449.00

Bradley Cliplift Lawn Mower Jack Lift MJ3000 Hydraulic Foot Pump
Bradley Cliplift Lawn Mower Jack Lift MJ3000 Hydraulic Foot Pump
$199.99
Time Remaining: 8d 19h 8m
Buy It Now for only: $199.99

hydraulic pump multi stage gear pump from a john deere reel mower
hydraulic pump multi stage gear pump from a john deere reel mower
$135.00
Time Remaining: 9d 3h 41m
Buy It Now for only: $135.00

Hydro Pump DUP10 Hydraulic Part Fits many models Parts only
Hydro Pump DUP10 Hydraulic Part Fits many models Parts only
$250.00
Time Remaining: 9d 14h 16m
Buy It Now for only: $250.00

Hydro Gear Hydraulic Pump Zero Turn Lawn Mower 103 2675
Hydro Gear Hydraulic Pump Zero Turn Lawn Mower 103 2675
$435.76
Time Remaining: 9d 17h 30m
Buy It Now for only: $435.76

John Deere F710 F725 Front Mount Hydraulic Power Steering Valve Pump NICE
John Deere F710 F725 Front Mount Hydraulic Power Steering Valve Pump NICE
$278.99
Time Remaining: 9d 18h 51m
Buy It Now for only: $278.99

Case 446 Tractor Hydraulic Oil Pump Mount
Case 446 Tractor Hydraulic Oil Pump Mount
$29.99
Time Remaining: 10d 22h 41m
Buy It Now for only: $29.99

Hydraulic Pump Case Ingersoll lawn tractor mower 3018PS 3020PS 4018PS 4020PS
Hydraulic Pump Case Ingersoll lawn tractor mower 3018PS 3020PS 4018PS 4020PS
$260.00
Time Remaining: 10d 23h 48m
Buy It Now for only: $260.00

CASE 222 Tractor Hydraulic Oil Pump Mount
CASE 222 Tractor Hydraulic Oil Pump Mount
$15.39
Time Remaining: 11d 2h 46m
Buy It Now for only: $15.39

John Deere 318 hydraulic transmission pump check valves free shipping
John Deere 318 hydraulic transmission pump check valves free shipping
$75.00
Time Remaining: 11d 6h 53m
Buy It Now for only: $75.00

Wheel Horse D 250 Tractor Hydraulic Oil Pump Pulley
Wheel Horse D 250 Tractor Hydraulic Oil Pump Pulley
$19.24
Time Remaining: 11d 17h 53m
Buy It Now for only: $19.24

Wheel Horse D 250 Tractor Hydraulic Oil Pump Mount
Wheel Horse D 250 Tractor Hydraulic Oil Pump Mount
$38.49
Time Remaining: 11d 17h 56m
Buy It Now for only: $38.49

JOHN DEERE 425 445 455 HYDRAULIC TRANSMISSION PUMP CHECK VALVES FREE SHIPPING
JOHN DEERE 425 445 455 HYDRAULIC TRANSMISSION PUMP CHECK VALVES FREE SHIPPING
$139.99
Time Remaining: 11d 19h 39m
Buy It Now for only: $139.99

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
$23.00
Time Remaining: 12d 1h 18m
Buy It Now for only: $23.00

Cub Cadet 3165 3185 HDS 3000 Series Hydrostatic Pump Hydro Hydraulic
Cub Cadet 3165 3185 HDS 3000 Series Hydrostatic Pump Hydro Hydraulic
$250.00
Time Remaining: 12d 11h 45m
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: 12d 13h
Buy It Now for only: $95.00

Hydrostatic Hydraulic Pump TCA14717 to 2005 John Deere 3245C Mower 1238
Hydrostatic Hydraulic Pump TCA14717 to 2005 John Deere 3245C Mower 1238
$550.00
Time Remaining: 12d 13h 20m
Buy It Now for only: $550.00

1969 CASE 222 Tractor Hydraulic oil Pump Mount Bolts
1969 CASE 222 Tractor Hydraulic oil Pump Mount Bolts
$6.15
Time Remaining: 12d 14h 31m
Buy It Now for only: $6.15

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: 12d 15h 33m
Buy It Now for only: $15.00

CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
$29.99
Time Remaining: 12d 15h 36m
Buy It Now for only: $29.99