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.

MASSEY FERGUSON 135 150 165 175 178 180 202 204 302+++ HYDRAULIC PUMP KIT 556602
MASSEY FERGUSON 135 150 165 175 178 180 202 204 302+++ HYDRAULIC PUMP KIT 556602
$194.56
Time Remaining: 34m
Buy It Now for only: $194.56

POWER STEERING HYDRAULIC PUMP CW Massey Ferguson MF 184 4 274 4 294 4 18L min
POWER STEERING HYDRAULIC PUMP CW Massey Ferguson MF 184 4 274 4 294 4 18L min
$259.95
Time Remaining: 54m
Buy It Now for only: $259.95

POWER STEERING HYDRAULIC PUMP CW White Oliver 1355 1365 1370 2 60 18L min NEW
POWER STEERING HYDRAULIC PUMP CW White Oliver 1355 1365 1370 2 60 18L min NEW
$259.95
Time Remaining: 54m
Buy It Now for only: $259.95

Universal Tractor Main Hydraulic Pump A42 L PRD2217S
Universal Tractor Main Hydraulic Pump A42 L PRD2217S
$285.00
Time Remaining: 1h 6m
Buy It Now for only: $285.00

David Brown K962635 Main Hydraulic Pump 880 990 1190
David Brown K962635 Main Hydraulic Pump 880 990 1190
$428.00
Time Remaining: 1h 20m
Buy It Now for only: $428.00

K962635 Hydraulic Pump Case David Brown Tractors 770 1190 1194 1290 1294
K962635 Hydraulic Pump Case David Brown Tractors 770 1190 1194 1290 1294
$346.16
Time Remaining: 1h 20m
Buy It Now for only: $346.16

AR98993 John Deere Hydraulic Pump Seal Kit 1020 1640 1750 2120 3120 RE228042
AR98993 John Deere Hydraulic Pump Seal Kit 1020 1640 1750 2120 3120 RE228042
$27.55
Time Remaining: 1h 36m
Buy It Now for only: $27.55

NEW Hydraulic Pump for Ford New Holland Tractor 5610 5610S 5900 6610 6610O
NEW Hydraulic Pump for Ford New Holland Tractor 5610 5610S 5900 6610 6610O
$414.26
Time Remaining: 1h 38m
Buy It Now for only: $414.26

NEW Hydraulic Pump for Ford New Holland Tractor 3900 Others 83936586
NEW Hydraulic Pump for Ford New Holland Tractor 3900 Others 83936586
$460.46
Time Remaining: 1h 40m
Buy It Now for only: $460.46

NEW Hydraulic Pump for Ford New Holland Tractor 5000 Others D0NN600G
NEW Hydraulic Pump for Ford New Holland Tractor 5000 Others D0NN600G
$429.66
Time Remaining: 1h 40m
Buy It Now for only: $429.66

MASSEY FERGUSON INDUSTRIAL 40 HYDRAULIC PUMP DRIVE SHAFT 708574M92
MASSEY FERGUSON INDUSTRIAL 40 HYDRAULIC PUMP DRIVE SHAFT 708574M92
$127.25
Time Remaining: 1h 47m
Buy It Now for only: $127.25

Ferguson Ford Hydraulic Pump Repair Kit TE20 TEA20 TEF20 TO20TO30 2N 8N 9N
Ferguson Ford Hydraulic Pump Repair Kit TE20 TEA20 TEF20 TO20TO30 2N 8N 9N
$485.00
Time Remaining: 1h 59m
Buy It Now for only: $485.00

1680061V91 Massey Ferguson Hydraulic Pump Valve 235 245 255 265 275 282 285 +
1680061V91 Massey Ferguson Hydraulic Pump Valve 235 245 255 265 275 282 285 +
$219.15
Time Remaining: 2h 9m
Buy It Now for only: $219.15

5023EA 5023EB IH FARMALL H BELLY PUMP CONTROL ARM LEVER HYDRAULICS
5023EA 5023EB IH FARMALL H BELLY PUMP CONTROL ARM LEVER HYDRAULICS
$35.00
Time Remaining: 2h 38m
Buy It Now for only: $35.00

81826808 New Ford Hydraulic Pump 5000 5100 5200 7000 7200 w Dual Power D2NN600B
81826808 New Ford Hydraulic Pump 5000 5100 5200 7000 7200 w Dual Power D2NN600B
$478.00
Time Remaining: 3h 31m
Buy It Now for only: $478.00

NEW Hydraulic Pump for Ford New Holland Tractor 5640 6610S 6640 6640O 6810S
NEW Hydraulic Pump for Ford New Holland Tractor 5640 6610S 6640 6640O 6810S
$537.46
Time Remaining: 3h 43m
Buy It Now for only: $537.46

3 4 Hydraulic Pump Drive Flange 112104
3 4 Hydraulic Pump Drive Flange 112104
$17.24
Time Remaining: 3h 49m
Buy It Now for only: $17.24

John Deere Hydraulic Pump Seal Kit AR98993
John Deere Hydraulic Pump Seal Kit AR98993
$29.55
Time Remaining: 3h 53m
Buy It Now for only: $29.55

Allis Chalmers Hydraulic Pump Assembly 72098141 Fits 5020 5030
Allis Chalmers Hydraulic Pump Assembly 72098141 Fits 5020 5030
$365.00
Time Remaining: 3h 53m
Buy It Now for only: $365.00

Hydraulic Pump Drive Shaft  Ford 2N 8N 9N 190760
Hydraulic Pump Drive Shaft Ford 2N 8N 9N 190760
$15.00
Time Remaining: 3h 57m
Buy It Now for only: $15.00

405181 NEW MCV HYDRAULIC PUMP DRIVE GEAR 405181R1 FOR 756 766 786 826 856 886 +
405181 NEW MCV HYDRAULIC PUMP DRIVE GEAR 405181R1 FOR 756 766 786 826 856 886 +
$59.00
Time Remaining: 4h 1m
Buy It Now for only: $59.00

Gear Hydraulic Pump Drive for Case 706 TRACTOR 382332R1
Gear Hydraulic Pump Drive for Case 706 TRACTOR 382332R1
$69.00
Time Remaining: 4h 1m
Buy It Now for only: $69.00

L827 10X LB New Ford Front Loader Hydraulic Pump 2N 600 700 900 Massey Ferguson
L827 10X LB New Ford Front Loader Hydraulic Pump 2N 600 700 900 Massey Ferguson
$311.80
Time Remaining: 4h 5m
Buy It Now for only: $311.80

NEW Hydraulic Pump for Ford New Holland Tractor 5610S Others F0NN600BB 81871528
NEW Hydraulic Pump for Ford New Holland Tractor 5610S Others F0NN600BB 81871528
$660.66
Time Remaining: 4h 8m
Buy It Now for only: $660.66

Ford Hydraulic Pump Safety Valve E1ADDN984
Ford Hydraulic Pump Safety Valve E1ADDN984
$27.90
Time Remaining: 4h 13m
Buy It Now for only: $27.90

NEW Hydraulic Pump for John Deere Tractor AR103033
NEW Hydraulic Pump for John Deere Tractor AR103033
$550.00
Time Remaining: 4h 18m
Buy It Now for only: $550.00

R79154 New John Deere Tractor Hydraulic Pump Shaft 4000 4020 4040 4230 4240 +
R79154 New John Deere Tractor Hydraulic Pump Shaft 4000 4020 4040 4230 4240 +
$102.45
Time Remaining: 4h 19m
Buy It Now for only: $102.45

FORD 9N 2N 8N FERGUSON TO20 TO30 HYDRAULIC PUMP VALVE CHAMBER REPAIR KIT VCK01
FORD 9N 2N 8N FERGUSON TO20 TO30 HYDRAULIC PUMP VALVE CHAMBER REPAIR KIT VCK01
$29.85
Time Remaining: 4h 31m
Buy It Now for only: $29.85

Hydraulic Pump for John Deere Tractors
Hydraulic Pump for John Deere Tractors
$850.00
Time Remaining: 4h 59m
Buy It Now for only: $850.00

FORD HYDRAULIC PUMP DRIVE GEAR 83910769 D6NN866B C7NN866B TW10 TW15 TW20 8000
FORD HYDRAULIC PUMP DRIVE GEAR 83910769 D6NN866B C7NN866B TW10 TW15 TW20 8000
$208.50
Time Remaining: 5h 6m
Buy It Now for only: $208.50

1176451 New Deutz Tractor Tandem Hydraulic Pump 7110 7120 DX90 DX630 DX650 ++
1176451 New Deutz Tractor Tandem Hydraulic Pump 7110 7120 DX90 DX630 DX650 ++
$866.63
Time Remaining: 5h 17m
Buy It Now for only: $866.63

Volvo hydraulic pump Part
Volvo hydraulic pump Part
$100.00
Time Remaining: 5h 44m

HYDRAULIC LIFT PUMP ASSEMBLY MASSEY FERGUSON TRACTOR 135 150 165 175 185 235 245
HYDRAULIC LIFT PUMP ASSEMBLY MASSEY FERGUSON TRACTOR 135 150 165 175 185 235 245
$419.98
Time Remaining: 6h 6m
Buy It Now for only: $419.98

HYDRAULIC LIFT PUMP MASSEY FERGUSON TRACTOR TO35 35 50 65 231 253 204 205 NEW
HYDRAULIC LIFT PUMP MASSEY FERGUSON TRACTOR TO35 35 50 65 231 253 204 205 NEW
$419.95
Time Remaining: 6h 29m
Buy It Now for only: $419.95

TX17203 New Long Tractor Hydraulic Pump TK76 JX55 85 85M 100 90 110 90 466 566 +
TX17203 New Long Tractor Hydraulic Pump TK76 JX55 85 85M 100 90 110 90 466 566 +
$144.37
Time Remaining: 6h 46m
Buy It Now for only: $144.37

Hydraulic Pump Ford 6610 7610 83996272 550131600E1NN600AB83996272E1NN600AB
Hydraulic Pump Ford 6610 7610 83996272 550131600E1NN600AB83996272E1NN600AB
$375.00
Time Remaining: 6h 50m
Buy It Now for only: $375.00

New MF Hydraulic Lift Pump 184473m93 1 Year Warranty
New MF Hydraulic Lift Pump 184473m93 1 Year Warranty
$395.00
Time Remaining: 7h 23m
Buy It Now for only: $395.00

John Deere Tandem Hydraulic Pump AR55346
John Deere Tandem Hydraulic Pump AR55346
$499.00
Time Remaining: 8h 44m

Hydraulic Pump O Ring Seal Kit John Deere Tractor 1020 1030 1040 1120 1130 1140
Hydraulic Pump O Ring Seal Kit John Deere Tractor 1020 1030 1040 1120 1130 1140
$45.45
Time Remaining: 8h 49m
Buy It Now for only: $45.45

Hydraulic Pump John Deere Tractor 1020 1030 1120 1130 1520 1530 1630 1640 1830
Hydraulic Pump John Deere Tractor 1020 1030 1120 1130 1520 1530 1630 1640 1830
$1,293.75
Time Remaining: 9h 22m
Buy It Now for only: $1,293.75

Drive Coupler Shaft Hydraulic Pump John Deere Tractor 1640 2140 2155 2350 2355
Drive Coupler Shaft Hydraulic Pump John Deere Tractor 1640 2140 2155 2350 2355
$105.05
Time Remaining: 9h 32m
Buy It Now for only: $105.05

Hydraulic Pump Shaft John Deere Tractor 4000 4020 4040 4230 4240 4320 4430 4440
Hydraulic Pump Shaft John Deere Tractor 4000 4020 4040 4230 4240 4320 4430 4440
$114.95
Time Remaining: 9h 55m
Buy It Now for only: $114.95

Hydraulic Pump Repair Kit
Hydraulic Pump Repair Kit
$8.00
Time Remaining: 10h 31m
Buy It Now for only: $8.00

P 704330R95 Hydraulic Pump IH Farmall B275 B414 424 354 364 384 2424 and more
P 704330R95 Hydraulic Pump IH Farmall B275 B414 424 354 364 384 2424 and more
$271.50
Time Remaining: 10h 58m
Buy It Now for only: $271.50

Ford backhoe TLB HYD pump A D1NN600B Hydraulic pump for 445540545A 550 555
Ford backhoe TLB HYD pump A D1NN600B Hydraulic pump for 445540545A 550 555
$620.00
Time Remaining: 11h 2m
Buy It Now for only: $620.00

New Massey Ferguson Hydraulic Pump 1684582m92
New Massey Ferguson Hydraulic Pump 1684582m92
$646.80
Time Remaining: 11h 29m
Buy It Now for only: $646.80

1081639M91 Massey Ferguson HYDRAULIC PUMP 35 65 135 150 165 175 178 513592M91
1081639M91 Massey Ferguson HYDRAULIC PUMP 35 65 135 150 165 175 178 513592M91
$722.83
Time Remaining: 12h 1m
Buy It Now for only: $722.83

Ford 3000 Tractor Hydraulic Pump Ford 2000 Hydraulic Pump Good Working
Ford 3000 Tractor Hydraulic Pump Ford 2000 Hydraulic Pump Good Working
$225.00
Time Remaining: 12h 14m

FORD 8N TRACTOR HYDRAULIC PUMP
FORD 8N TRACTOR HYDRAULIC PUMP
$129.99 (1 Bid)
Time Remaining: 13h 24m

NEW Hydraulic Pump Strainer for Massey Ferguson Tractor 282 283 UK 285
NEW Hydraulic Pump Strainer for Massey Ferguson Tractor 282 283 UK 285
$19.95
Time Remaining: 16h 18m
Buy It Now for only: $19.95

R34359 John Deere Hydraulic Pump Drive Coupler 3020 +
R34359 John Deere Hydraulic Pump Drive Coupler 3020 +
$72.75
Time Remaining: 22h 16m
Buy It Now for only: $72.75

W248084B front housing for White Planter Hydraulic Pump
W248084B front housing for White Planter Hydraulic Pump
$128.00
Time Remaining: 23h 20m
Buy It Now for only: $128.00

W248421B internal pump for White Planter Hydraulic Pump assembly
W248421B internal pump for White Planter Hydraulic Pump assembly
$395.00
Time Remaining: 23h 20m
Buy It Now for only: $395.00

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: 23h 20m
Buy It Now for only: $125.00

W248085B rear housing for White Planter Hydraulic Pump
W248085B rear housing for White Planter Hydraulic Pump
$128.00
Time Remaining: 23h 20m
Buy It Now for only: $128.00

NEW Hydraulic Lift Pump Massey Ferguson Tractor 35 50 65 TO35 253
NEW Hydraulic Lift Pump Massey Ferguson Tractor 35 50 65 TO35 253
$225.00
Time Remaining: 23h 33m
Buy It Now for only: $225.00

NEW Hydraulic Pump Massey Ferguson Tractor 362 365 Others 3701159M91
NEW Hydraulic Pump Massey Ferguson Tractor 362 365 Others 3701159M91
$460.46
Time Remaining: 23h 33m
Buy It Now for only: $460.46

New Hydraulic Pump D0NN600F Fits 3550  4000
New Hydraulic Pump D0NN600F Fits 3550 4000
$349.95
Time Remaining: 1d 46m
Buy It Now for only: $349.95

1687042M91 Massey Ferguson 135150165175175UK Hydraulic Pump Filter Strainer
1687042M91 Massey Ferguson 135150165175175UK Hydraulic Pump Filter Strainer
$13.50
Time Remaining: 1d 56m
Buy It Now for only: $13.50

NEW Hydraulic Pump Valve for Massey Ferguson Tractor 30 40 Others 1680061V91
NEW Hydraulic Pump Valve for Massey Ferguson Tractor 30 40 Others 1680061V91
$112.00
Time Remaining: 1d 58m
Buy It Now for only: $112.00

NEW Hydraulic Pump for Massey Ferguson 886821M94 12 Spline Shaft
NEW Hydraulic Pump for Massey Ferguson 886821M94 12 Spline Shaft
$225.30
Time Remaining: 1d 58m
Buy It Now for only: $225.30

C5NN851A Ford NH NAA60070080090020004000 Hydraulic Pump Shaft Oil Seal
C5NN851A Ford NH NAA60070080090020004000 Hydraulic Pump Shaft Oil Seal
$6.33
Time Remaining: 1d 3h 20m
Buy It Now for only: $6.33

NEW Hydraulic Lift Pump for Massey Ferguson Tractor 135 Others 1684582M92
NEW Hydraulic Lift Pump for Massey Ferguson Tractor 135 Others 1684582M92
$429.66
Time Remaining: 1d 4h 8m
Buy It Now for only: $429.66

MASSEY FERGUSON TO35 MF35 MF50 65 135 165 HYDRAULIC PUMP PISTON 190799M1 584
MASSEY FERGUSON TO35 MF35 MF50 65 135 165 HYDRAULIC PUMP PISTON 190799M1 584
$19.00
Time Remaining: 1d 4h 51m
Buy It Now for only: $19.00

NEW Hydraulic Pump for John Deere Tractor 1020 1040 1120 1130 1140 1350 1520
NEW Hydraulic Pump for John Deere Tractor 1020 1040 1120 1130 1140 1350 1520
$550.00
Time Remaining: 1d 4h 58m
Buy It Now for only: $550.00

NEW Hydraulic Pump for John Deere Tractor 4755 4760 4850 4955 4960 8430
NEW Hydraulic Pump for John Deere Tractor 4755 4760 4850 4955 4960 8430
$1,050.00
Time Remaining: 1d 5h 3m
Buy It Now for only: $1,050.00

3600 ford tractor hydraulic pump line pipe pressure 2600
3600 ford tractor hydraulic pump line pipe pressure 2600
$115.00
Time Remaining: 1d 5h 9m
Buy It Now for only: $115.00

NEW Hydraulic Pump for Massey Ferguson Tractor 531607M93
NEW Hydraulic Pump for Massey Ferguson Tractor 531607M93
$429.66
Time Remaining: 1d 5h 18m
Buy It Now for only: $429.66

3600 ford tractor diesel hydraulic pump return line pipe 2600
3600 ford tractor diesel hydraulic pump return line pipe 2600
$125.00
Time Remaining: 1d 5h 19m
Buy It Now for only: $125.00

International Hydraulic Pump 330 340 460 504 544 560 606 656 373966R94 70935C91
International Hydraulic Pump 330 340 460 504 544 560 606 656 373966R94 70935C91
$292.50
Time Remaining: 1d 5h 19m
Buy It Now for only: $292.50

NEW Hydraulic Pump for John Deere Tractor 7740 7445 COTTON STRIPPER
NEW Hydraulic Pump for John Deere Tractor 7740 7445 COTTON STRIPPER
$550.00
Time Remaining: 1d 5h 28m
Buy It Now for only: $550.00

NEW Hydraulic Pump for John Deere Tractor 4520 4555 4560 4620 4630 4640 4650
NEW Hydraulic Pump for John Deere Tractor 4520 4555 4560 4620 4630 4640 4650
$1,050.00
Time Remaining: 1d 5h 28m
Buy It Now for only: $1,050.00

NEW Hydraulic Pump Gear for Case International Tractor 704331R91
NEW Hydraulic Pump Gear for Case International Tractor 704331R91
$42.42
Time Remaining: 1d 5h 33m
Buy It Now for only: $42.42

Mahindra Tractor Seal Kit Hydraulic Pump 005553257R91
Mahindra Tractor Seal Kit Hydraulic Pump 005553257R91
$67.00
Time Remaining: 1d 5h 41m
Buy It Now for only: $67.00

OLIVER HYDRAULIC PUMP A25L 675636AS 31 2906458 1355 1365 1370 1465 1470 2 60
OLIVER HYDRAULIC PUMP A25L 675636AS 31 2906458 1355 1365 1370 1465 1470 2 60
$225.00
Time Remaining: 1d 5h 48m
Buy It Now for only: $225.00

NEW Hydraulic Lift Pump for Massey Ferguson Tractor 1683301M92 1672251M92
NEW Hydraulic Lift Pump for Massey Ferguson Tractor 1683301M92 1672251M92
$614.46
Time Remaining: 1d 5h 53m
Buy It Now for only: $614.46