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.

New Parker Truck PTO Hydraulic Pump 3039113232
New Parker Truck PTO Hydraulic Pump 3039113232
$374.99
Time Remaining: 34m
Buy It Now for only: $374.99

Eaton 5420 193 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 193 Hydrostatic Hydraulic Piston Pump Repair
$3,095.00
Time Remaining: 46m
Buy It Now for only: $3,095.00

Eaton 5420 195 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 195 Hydrostatic Hydraulic Piston Pump Repair
$2,495.00
Time Remaining: 55m
Buy It Now for only: $2,495.00

FORD 9N 2N 8N HYDRAULIC PUMP VALVE CHAMBER KIT
FORD 9N 2N 8N HYDRAULIC PUMP VALVE CHAMBER KIT
$41.95
Time Remaining: 1h 19m
Buy It Now for only: $41.95

AR52224 New John Deere Tractor Hydraulic Pump Shaft Seal 4000 4010 4020 4030 ++
AR52224 New John Deere Tractor Hydraulic Pump Shaft Seal 4000 4010 4020 4030 ++
$9.92
Time Remaining: 1h 27m
Buy It Now for only: $9.92

FHPK600 5 Ford New Holland 3000 4000 Tractor Hydraulic Pump Repair Kit FHPK6005
FHPK600 5 Ford New Holland 3000 4000 Tractor Hydraulic Pump Repair Kit FHPK6005
$47.75
Time Remaining: 1h 51m
Buy It Now for only: $47.75

New 580K 580F Case Backhoe Hydraulic Pump D134590
New 580K 580F Case Backhoe Hydraulic Pump D134590
$800.00
Time Remaining: 1h 51m
Buy It Now for only: $800.00

Eaton 5420 199 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 199 Hydrostatic Hydraulic Piston Pump Repair
$2,495.00
Time Remaining: 1h 53m
Buy It Now for only: $2,495.00

R79156 New John Deere Tractor Hydraulic Pump Shaft 3140 4000 4020 4040 4230 ++
R79156 New John Deere Tractor Hydraulic Pump Shaft 3140 4000 4020 4040 4230 ++
$82.83
Time Remaining: 1h 55m
Buy It Now for only: $82.83

NEW Hydraulic Pump for Ford New Holland Tractor 3900 Others D8NN600KB
NEW Hydraulic Pump for Ford New Holland Tractor 3900 Others D8NN600KB
$368.06
Time Remaining: 2h 1m
Buy It Now for only: $368.06

128190C91 Pump Hydraulic Case IH Tractor M Super M Super MTA W9 400 450Gas
128190C91 Pump Hydraulic Case IH Tractor M Super M Super MTA W9 400 450Gas
$946.36
Time Remaining: 2h 27m
Buy It Now for only: $946.36

Hydraulic pump seal Kit David Brown
Hydraulic pump seal Kit David Brown
$35.00
Time Remaining: 2h 28m
Buy It Now for only: $35.00

Eaton 5420 209 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 209 Hydrostatic Hydraulic Piston Pump Repair
$3,095.00
Time Remaining: 2h 32m
Buy It Now for only: $3,095.00

HYDRAULIC PUMP MASSEY FERGUSON TO35 MF 35 50 65 202 203 204 205 302 304 40E 231
HYDRAULIC PUMP MASSEY FERGUSON TO35 MF 35 50 65 202 203 204 205 302 304 40E 231
$321.30
Time Remaining: 2h 35m
Buy It Now for only: $321.30

Eaton 5420 210 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 210 Hydrostatic Hydraulic Piston Pump Repair
$1,995.00
Time Remaining: 2h 36m
Buy It Now for only: $1,995.00

128191C91 Pump Hydraulic Case IH Tractor Super H300 350GAS ONLY
128191C91 Pump Hydraulic Case IH Tractor Super H300 350GAS ONLY
$945.11
Time Remaining: 2h 43m
Buy It Now for only: $945.11

15605 2 Gallon Air Hydraulic Pump
15605 2 Gallon Air Hydraulic Pump
$4,670.00
Time Remaining: 2h 44m
Buy It Now for only: $4,670.00

15900 25 Qt Air Hydraulic Pump with High Density Polyethlene Reservoir
15900 25 Qt Air Hydraulic Pump with High Density Polyethlene Reservoir
$605.00
Time Remaining: 2h 44m
Buy It Now for only: $605.00

15905 25 Qt Air Hydraulic Pump w Aluminum Reservoir 10000 PSI
15905 25 Qt Air Hydraulic Pump w Aluminum Reservoir 10000 PSI
$395.00
Time Remaining: 2h 44m
Buy It Now for only: $395.00

15906 25 Qt Air Hydraulic Pump w Aluminum Reservoir 5500 PSI
15906 25 Qt Air Hydraulic Pump w Aluminum Reservoir 5500 PSI
$395.00
Time Remaining: 2h 44m
Buy It Now for only: $395.00

15907 25 Qt Air Hydraulic Pump w Aluminum Reservoir 3900 PSI
15907 25 Qt Air Hydraulic Pump w Aluminum Reservoir 3900 PSI
$395.00
Time Remaining: 2h 44m
Buy It Now for only: $395.00

15920 5 QtAir Hydraulic Pump w Steel Reservoir
15920 5 QtAir Hydraulic Pump w Steel Reservoir
$690.00
Time Remaining: 2h 44m
Buy It Now for only: $690.00

15924 Titan 5 Quart Air Hydraulic Pump with Steel Reservoir
15924 Titan 5 Quart Air Hydraulic Pump with Steel Reservoir
$450.00
Time Remaining: 2h 44m
Buy It Now for only: $450.00

15940 2 Gal Air Hydraulic Pump w Steel Reservoir
15940 2 Gal Air Hydraulic Pump w Steel Reservoir
$825.00
Time Remaining: 2h 44m
Buy It Now for only: $825.00

MASSEY FERGUSON INDUSTRIAL 20C 30B 30D HYDRAULIC PUMP DRIVE SHAFT 729563M91
MASSEY FERGUSON INDUSTRIAL 20C 30B 30D HYDRAULIC PUMP DRIVE SHAFT 729563M91
$103.90
Time Remaining: 2h 45m
Buy It Now for only: $103.90

HYDRAULIC PUMP MASSEY FERGUSON 20C 230 240 245 250 255 265 275 283 283 298 30
HYDRAULIC PUMP MASSEY FERGUSON 20C 230 240 245 250 255 265 275 283 283 298 30
$454.30
Time Remaining: 2h 50m
Buy It Now for only: $454.30

HYDRAULIC PUMP MASSEY FERGUSON 165 175 180 235 245 253 255 263 265 275 283 285
HYDRAULIC PUMP MASSEY FERGUSON 165 175 180 235 245 253 255 263 265 275 283 285
$321.30
Time Remaining: 3h 1m
Buy It Now for only: $321.30

R63629 New John Deere Hydraulic Pump Shaft Bearing Race 1020 1030 1040 1120 ++
R63629 New John Deere Hydraulic Pump Shaft Bearing Race 1020 1030 1040 1120 ++
$15.90
Time Remaining: 3h 4m
Buy It Now for only: $15.90

HYDRAULIC PUMP INTERNATIONAL B275 B414 354 364 424 444 2300A 2424 2444
HYDRAULIC PUMP INTERNATIONAL B275 B414 354 364 424 444 2300A 2424 2444
$237.30
Time Remaining: 3h 17m
Buy It Now for only: $237.30

Ford Tractor 800 900 Engine 172 Hydraulic Pump Drive Gear
Ford Tractor 800 900 Engine 172 Hydraulic Pump Drive Gear
$19.00
Time Remaining: 3h 35m
Buy It Now for only: $19.00

David BrownTractor Main Hydraulic Pump K200330 K919048
David BrownTractor Main Hydraulic Pump K200330 K919048
$258.50
Time Remaining: 3h 43m
Buy It Now for only: $258.50

D6NN867A Five New Ford New Holland Tractor Hydraulic Pump Cover G
D6NN867A Five New Ford New Holland Tractor Hydraulic Pump Cover G
$8.77
Time Remaining: 3h 55m
Buy It Now for only: $8.77

135484A1 Cooler Aux Hydraulic Pump Oil Case IH Combine 2366
135484A1 Cooler Aux Hydraulic Pump Oil Case IH Combine 2366
$775.78
Time Remaining: 3h 56m
Buy It Now for only: $775.78

A  I A 190799M1 Hydraulic Pump Piston Massey Ferguson 135 150 165 175
A I A 190799M1 Hydraulic Pump Piston Massey Ferguson 135 150 165 175
$37.99
Time Remaining: 4h 2m
Buy It Now for only: $37.99

A62051 New Hydraulic Pump Case 770 870 970 1070 1090 1170 1175 A58299
A62051 New Hydraulic Pump Case 770 870 970 1070 1090 1170 1175 A58299
$882.33
Time Remaining: 4h 31m
Buy It Now for only: $882.33

Hydraulic Pump Kit Massey Ferguson Tractor MF202 MF2135 MF302 MF304 135 150 165
Hydraulic Pump Kit Massey Ferguson Tractor MF202 MF2135 MF302 MF304 135 150 165
$255.35
Time Remaining: 5h 18m
Buy It Now for only: $255.35

New MF Hydraulic Pump 3597420m91
New MF Hydraulic Pump 3597420m91
$864.10
Time Remaining: 5h 22m
Buy It Now for only: $864.10

JOHN DEERE NEW HYDRAULIC PUMP RE223233 5045 5055 5065 5075
JOHN DEERE NEW HYDRAULIC PUMP RE223233 5045 5055 5065 5075
$925.98
Time Remaining: 5h 26m
Buy It Now for only: $925.98

NEW HYDRAULIC PUMP CASE INTERNATIONAL 354 384 424 2424
NEW HYDRAULIC PUMP CASE INTERNATIONAL 354 384 424 2424
$215.50
Time Remaining: 5h 27m
Buy It Now for only: $215.50

Massey Ferguson Hydraulic Pump Drive Shaft Assembly 729566M91
Massey Ferguson Hydraulic Pump Drive Shaft Assembly 729566M91
$142.60
Time Remaining: 6h 36m
Buy It Now for only: $142.60

New Ford Hydraulic Pump 8630 8730 8830 TW5 TW15 TW25
New Ford Hydraulic Pump 8630 8730 8830 TW5 TW15 TW25
$299.00
Time Remaining: 7h 40m
Buy It Now for only: $299.00

Vintage Hydraulic Motor Pump Equipment Tractor log splitter w safeway couplers
Vintage Hydraulic Motor Pump Equipment Tractor log splitter w safeway couplers
$29.95 (1 Bid)
Time Remaining: 8h 12m

B158310 Pump Drive Belt Fits Exmark Turf Tracer Hydraulic
B158310 Pump Drive Belt Fits Exmark Turf Tracer Hydraulic
$19.47
Time Remaining: 9h 29m
Buy It Now for only: $19.47

A139692 Pump Auxillary Hydraulic Case IH Tractor 107011751270137015702470
A139692 Pump Auxillary Hydraulic Case IH Tractor 107011751270137015702470
$1,060.67
Time Remaining: 9h 33m
Buy It Now for only: $1,060.67

OLIVER HYDRAULIC PUMP 160016501700175018001850
OLIVER HYDRAULIC PUMP 160016501700175018001850
$475.30
Time Remaining: 9h 48m
Buy It Now for only: $475.30

JCB 3CX PARTS HYDRAULIC PUMP JCB TRANSMISSION new
JCB 3CX PARTS HYDRAULIC PUMP JCB TRANSMISSION new
$191.00
Time Remaining: 10h 5m
Buy It Now for only: $191.00

950 john deere 850 950 1050 tractor hydraulic pump CH11272 part
950 john deere 850 950 1050 tractor hydraulic pump CH11272 part
$370.44
Time Remaining: 10h 22m
Buy It Now for only: $370.44

NEW MASSEY FERGUSON135 Hydraulic Pump Oscillator Part  1860126M91
NEW MASSEY FERGUSON135 Hydraulic Pump Oscillator Part 1860126M91
$13.49
Time Remaining: 16h 46m
Buy It Now for only: $13.49

John Deere 620 630 Hydraulic Pump F2732R
John Deere 620 630 Hydraulic Pump F2732R
$124.95
Time Remaining: 17h 29m
Buy It Now for only: $124.95

CASE COMBINE 2366 135484A1 Cooler Aux Hydraulic Pump Oil
CASE COMBINE 2366 135484A1 Cooler Aux Hydraulic Pump Oil
$715.00
Time Remaining: 17h 45m
Buy It Now for only: $715.00

Ford Tractor Hydraulic Manifold 1953 55 Vane Type Pump NAA Jubilee Early 800
Ford Tractor Hydraulic Manifold 1953 55 Vane Type Pump NAA Jubilee Early 800
$95.00
Time Remaining: 17h 50m
Buy It Now for only: $95.00

Ford NAA Jubilee Tractor Hydraulic Pump NCA600F Hyd Line NAA876A Used
Ford NAA Jubilee Tractor Hydraulic Pump NCA600F Hyd Line NAA876A Used
$725.00
Time Remaining: 17h 55m
Buy It Now for only: $725.00

Ford Tractors 1965 9 69 Engine Mounted Hydraulic Pump New 2000 3000 4000
Ford Tractors 1965 9 69 Engine Mounted Hydraulic Pump New 2000 3000 4000
$1,775.75
Time Remaining: 17h 55m
Buy It Now for only: $1,775.75

120114C91 E Hydraulic Pump Fits Case IH 786 886 986 1086 1486 1568 1586 3088
120114C91 E Hydraulic Pump Fits Case IH 786 886 986 1086 1486 1568 1586 3088
$287.42
Time Remaining: 18h 13m
Buy It Now for only: $287.42

R34348 New John Deere Hydraulic Pump Shaft 3010 3020 4010 4020 4040 4230 4240 ++
R34348 New John Deere Hydraulic Pump Shaft 3010 3020 4010 4020 4040 4230 4240 ++
$55.38
Time Remaining: 18h 51m
Buy It Now for only: $55.38

707166M92 Massey Ferguson Hydraulic Pump Drive Shaft
707166M92 Massey Ferguson Hydraulic Pump Drive Shaft
$120.86
Time Remaining: 19h 31m
Buy It Now for only: $120.86

John Deere Hydraulic Pump Cam Shaft R39319
John Deere Hydraulic Pump Cam Shaft R39319
$58.00
Time Remaining: 19h 31m
Buy It Now for only: $58.00

W248420B relief valve for internal pump on White Planter Hydraulic Pump
W248420B relief valve for internal pump on White Planter Hydraulic Pump
$125.00
Time Remaining: 19h 56m
Buy It Now for only: $125.00

Farmall M hydraulic pump arm
Farmall M hydraulic pump arm
$9.99
Time Remaining: 20h 18m

Massey Ferguson Ford Hydraulic Pump 712 730 735 MF30+
Massey Ferguson Ford Hydraulic Pump 712 730 735 MF30+
$473.50
Time Remaining: 20h 29m
Buy It Now for only: $473.50

D8NN600KB New Ford Hydraulic Pump 3900 4600 5600 5700 6600 6700 7600 7700 +
D8NN600KB New Ford Hydraulic Pump 3900 4600 5600 5700 6600 6700 7600 7700 +
$329.15
Time Remaining: 20h 46m
Buy It Now for only: $329.15

NOS Case IH Steiger Tractor Hydraulic Pump 18 15 Hydreco 1515KC3B1AB
NOS Case IH Steiger Tractor Hydraulic Pump 18 15 Hydreco 1515KC3B1AB
$499.95
Time Remaining: 21h
Buy It Now for only: $499.95

FORD HYDRAULIC PUMP SHAFT 2000 3000 4000 2600 3600 4600 C5NN966A
FORD HYDRAULIC PUMP SHAFT 2000 3000 4000 2600 3600 4600 C5NN966A
$85.00
Time Remaining: 21h 37m
Buy It Now for only: $85.00

NEW JOHN DEERE HYDRAULIC PUMP  YZ502246
NEW JOHN DEERE HYDRAULIC PUMP YZ502246
$999.99
Time Remaining: 22h
Buy It Now for only: $999.99

Ford Hydraulic Pump 3230 3400 3430 3550 3910 3930 4610
Ford Hydraulic Pump 3230 3400 3430 3550 3910 3930 4610
$364.95
Time Remaining: 22h 17m
Buy It Now for only: $364.95

Eaton 5420 216 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 216 Hydrostatic Hydraulic Piston Pump Repair
$2,495.00
Time Remaining: 23h 16m
Buy It Now for only: $2,495.00

Eaton 5420 217 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 217 Hydrostatic Hydraulic Piston Pump Repair
$2,495.00
Time Remaining: 23h 19m
Buy It Now for only: $2,495.00

MAHINDRA TRACTOR HYDRAULIC PUMP WITH MANIFOLD FOR 25 AND 30 SERIES MODELS
MAHINDRA TRACTOR HYDRAULIC PUMP WITH MANIFOLD FOR 25 AND 30 SERIES MODELS
$525.00
Time Remaining: 23h 27m
Buy It Now for only: $525.00

MF Hydraulic Pump Repair Kit for 35 65
MF Hydraulic Pump Repair Kit for 35 65
$197.50
Time Remaining: 1d 2m
Buy It Now for only: $197.50

Ford Tractor Gear Type Hydraulic Pump 3500 4000 4500
Ford Tractor Gear Type Hydraulic Pump 3500 4000 4500
$410.72
Time Remaining: 1d 38m
Buy It Now for only: $410.72

Case IH Hydraulic Pump Assembly 1543241C1
Case IH Hydraulic Pump Assembly 1543241C1
$3,073.50
Time Remaining: 1d 39m
Buy It Now for only: $3,073.50

Eaton 5420 231 Hydrostatic Hydraulic Piston Pump Repair
Eaton 5420 231 Hydrostatic Hydraulic Piston Pump Repair
$2,495.00
Time Remaining: 1d 44m
Buy It Now for only: $2,495.00

E2NN600AB Ford New Holland Hydraulic Pump 2810 2910 3610 4110 4630 5030 231 335
E2NN600AB Ford New Holland Hydraulic Pump 2810 2910 3610 4110 4630 5030 231 335
$380.48
Time Remaining: 1d 57m
Buy It Now for only: $380.48

Ford Tractor Hydraulic Pump Elbow NCA 933F
Ford Tractor Hydraulic Pump Elbow NCA 933F
$150.00
Time Remaining: 1d 1h 9m
Buy It Now for only: $150.00

RE29103 John Deere Hydraulic Pump Seal Kit 3010 2520 4000 4010 4020
RE29103 John Deere Hydraulic Pump Seal Kit 3010 2520 4000 4010 4020
$16.50
Time Remaining: 1d 1h 18m
Buy It Now for only: $16.50

TX17203 Long Tractor Hydraulic Pump 2510 2610 680
TX17203 Long Tractor Hydraulic Pump 2510 2610 680
$149.67
Time Remaining: 1d 1h 26m
Buy It Now for only: $149.67