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.

AR45822 R45822 John Deere Hydraulic Pump Shaft Drive Pin Bushings 1020 2040 4000
AR45822 R45822 John Deere Hydraulic Pump Shaft Drive Pin Bushings 1020 2040 4000
$10.99
Time Remaining: 31m
Buy It Now for only: $10.99

Allis Chalmers Hydraulic Pump Assembly 70249437
Allis Chalmers Hydraulic Pump Assembly 70249437
$1,982.55
Time Remaining: 47m
Buy It Now for only: $1,982.55

New Ford Hydraulic Pump W Relief Valve Fits 5610 6610
New Ford Hydraulic Pump W Relief Valve Fits 5610 6610
$914.10
Time Remaining: 1h 4m
Buy It Now for only: $914.10

New Ford Hydraulic Pump Fits 8530 8630 8730 TW5 TW25
New Ford Hydraulic Pump Fits 8530 8630 8730 TW5 TW25
$643.10
Time Remaining: 1h 4m
Buy It Now for only: $643.10

New Rear Mounted Hydraulic Pump for David Brown A962635
New Rear Mounted Hydraulic Pump for David Brown A962635
$557.00
Time Remaining: 1h 9m
Buy It Now for only: $557.00

Bobcat Hydraulic Pump 843 Isuzu 25386RAM 25386RAU 26510RAM 6632039 6651877
Bobcat Hydraulic Pump 843 Isuzu 25386RAM 25386RAU 26510RAM 6632039 6651877
$995.00
Time Remaining: 1h 55m
Buy It Now for only: $995.00

FORD 5000 HYDRAULIC PUMP REAR COVER PLATE C5NNN619C PART  FOR REFERENCE ONLY
FORD 5000 HYDRAULIC PUMP REAR COVER PLATE C5NNN619C PART FOR REFERENCE ONLY
$19.99
Time Remaining: 2h 52m
Buy It Now for only: $19.99

FORD 2N9N HYDRAULIC PUMP USED
FORD 2N9N HYDRAULIC PUMP USED
$349.00
Time Remaining: 2h 52m
Buy It Now for only: $349.00

FORD 200030004000 PISTON HYDRAULIC PUMP REFURBISHED
FORD 200030004000 PISTON HYDRAULIC PUMP REFURBISHED
$599.00
Time Remaining: 2h 52m
Buy It Now for only: $599.00

JCB 3CX PARTS HYDRAULIC PUMP JCB TRANSMISSION new
JCB 3CX PARTS HYDRAULIC PUMP JCB TRANSMISSION new
$181.45
Time Remaining: 5h 1m
Buy It Now for only: $181.45

544708R92 Hydraulic Pump 18 GPM Fits Case IH24002500454574
544708R92 Hydraulic Pump 18 GPM Fits Case IH24002500454574
$984.81
Time Remaining: 5h 3m
Buy It Now for only: $984.81

Ford New Holland Hydraulic Pump 83996272 83996336 E1NN600AA E1NN600AB
Ford New Holland Hydraulic Pump 83996272 83996336 E1NN600AA E1NN600AB
$299.95
Time Remaining: 9h 59m
Buy It Now for only: $299.95

Ford New Holland Hydraulic Pump D5NN600C 8000 8400 8600 8700 9000 9200
Ford New Holland Hydraulic Pump D5NN600C 8000 8400 8600 8700 9000 9200
$489.95
Time Remaining: 9h 59m
Buy It Now for only: $489.95

Ford New Holland Hydraulic Pump E0NN600AC 5110 5610 5610S 5900 6610 6610S
Ford New Holland Hydraulic Pump E0NN600AC 5110 5610 5610S 5900 6610 6610S
$368.95
Time Remaining: 9h 59m
Buy It Now for only: $368.95

Ford New Holland Hydraulic Pump Seal 83925002 front drive gear shaft seal
Ford New Holland Hydraulic Pump Seal 83925002 front drive gear shaft seal
$15.00
Time Remaining: 9h 59m
Buy It Now for only: $15.00

Ford New Holland Hydraulic Pump 83957379 E0NN600AC 5110 5610 5610S 5900
Ford New Holland Hydraulic Pump 83957379 E0NN600AC 5110 5610 5610S 5900
$338.95
Time Remaining: 10h
Buy It Now for only: $338.95

Ford New Holland Hydraulic Pump E7NN3K514CA 250C 260C 340 340A 340B 345C LO
Ford New Holland Hydraulic Pump E7NN3K514CA 250C 260C 340 340A 340B 345C LO
$325.00
Time Remaining: 10h
Buy It Now for only: $325.00

MASSEY FERGUSON 135 Hydraulic Pump Cam Shaft 10 SplinesReplacement  181994M1
MASSEY FERGUSON 135 Hydraulic Pump Cam Shaft 10 SplinesReplacement 181994M1
$49.99
Time Remaining: 12h 22m
Buy It Now for only: $49.99

Ford New Holland Hydraulic Pump  D2NN600B 81826808
Ford New Holland Hydraulic Pump D2NN600B 81826808
$455.00
Time Remaining: 13h 58m
Buy It Now for only: $455.00

HYDRAULIC PUMP REPAIR KIT CONTROL VALVE Ford Tractor 2N 8N 9N Massey Ferguson
HYDRAULIC PUMP REPAIR KIT CONTROL VALVE Ford Tractor 2N 8N 9N Massey Ferguson
$169.00
Time Remaining: 14h 11m
Buy It Now for only: $169.00

Ford Hydraulic Pump 5610 5610S 5900 6610 6610S 6710  6810 E0NN600AC
Ford Hydraulic Pump 5610 5610S 5900 6610 6610S 6710 6810 E0NN600AC
$269.00
Time Remaining: 14h 48m
Buy It Now for only: $269.00

MASSEY FERGUSON TO35 35 50 65 135 165 175 202 HYDRAULIC PUMP CHAMBER 184471M1
MASSEY FERGUSON TO35 35 50 65 135 165 175 202 HYDRAULIC PUMP CHAMBER 184471M1
$28.00
Time Remaining: 15h 33m
Buy It Now for only: $28.00

OEM Agco Hydraulic Pump New 395CIR V  536083D1 HPA4065RB1GLK6090 AG524476
OEM Agco Hydraulic Pump New 395CIR V 536083D1 HPA4065RB1GLK6090 AG524476
$749.00
Time Remaining: 15h 39m
Buy It Now for only: $749.00

70933C91 IH Farmall Hitch Hydraulic Pump Tractor 12 gpm
70933C91 IH Farmall Hitch Hydraulic Pump Tractor 12 gpm
$284.00
Time Remaining: 16h 3m
Buy It Now for only: $284.00

INTERNATIONAL FARMALL Main Hitch Hydraulic Pump New
INTERNATIONAL FARMALL Main Hitch Hydraulic Pump New
$380.00
Time Remaining: 16h 4m
Buy It Now for only: $380.00

70931C91 New IH Farmall Hydraulic Pump 460 560 706 806 826 856 986 1086 1486 +
70931C91 New IH Farmall Hydraulic Pump 460 560 706 806 826 856 986 1086 1486 +
$331.26
Time Remaining: 16h 7m
Buy It Now for only: $331.26

Kubota Hinomoto Massey Ferguson Tractor Hydraulic Pump HP 3
Kubota Hinomoto Massey Ferguson Tractor Hydraulic Pump HP 3
$299.99
Time Remaining: 16h 15m
Buy It Now for only: $299.99

A 70269937 Hydraulic Pump for various Allis Chalmers Allis Chalmers 7000 Tractor
A 70269937 Hydraulic Pump for various Allis Chalmers Allis Chalmers 7000 Tractor
$1,485.00
Time Remaining: 16h 33m
Buy It Now for only: $1,485.00

BELARUS TRACTOR HYDRAULIC PUMP ROUND 6spl NSH32A300
BELARUS TRACTOR HYDRAULIC PUMP ROUND 6spl NSH32A300
$299.99
Time Remaining: 16h 42m
Buy It Now for only: $299.99

John Deere Hydraulic Pump AR101807
John Deere Hydraulic Pump AR101807
$950.00
Time Remaining: 16h 51m
Buy It Now for only: $950.00

Ford Hydraulic Pump Shaft Assembly C5NN966A
Ford Hydraulic Pump Shaft Assembly C5NN966A
$84.40
Time Remaining: 16h 52m
Buy It Now for only: $84.40

NEW AL161043 AL151513 Hydraulic Pump for John Deere Tractor
NEW AL161043 AL151513 Hydraulic Pump for John Deere Tractor
$1,699.00
Time Remaining: 16h 55m
Buy It Now for only: $1,699.00

R68548 John Deere 2440 2640 Hydraulic Pump Drive Shaft
R68548 John Deere 2440 2640 Hydraulic Pump Drive Shaft
$150.00
Time Remaining: 17h 6m
Buy It Now for only: $150.00

YANMAR TRACTOR HYDRAULIC PUMP YM1500 1600 1700 1900 2000 more
YANMAR TRACTOR HYDRAULIC PUMP YM1500 1600 1700 1900 2000 more
$373.99
Time Remaining: 17h 31m
Buy It Now for only: $373.99

120114C91 Pump Hydraulic 12 GPM MCV fits Case IH 1086 1486 1568 1586 3088
120114C91 Pump Hydraulic 12 GPM MCV fits Case IH 1086 1486 1568 1586 3088
$415.28
Time Remaining: 17h 34m
Buy It Now for only: $415.28

MAHINDRA TRACTOR HYDRAULIC PUMP FOR 4500 5500 6000 6500 TRACTOR
MAHINDRA TRACTOR HYDRAULIC PUMP FOR 4500 5500 6000 6500 TRACTOR
$339.00
Time Remaining: 17h 49m
Buy It Now for only: $339.00

MAHINDRA TRACTOR HYDRAULIC PUMP FOR 4505 5005 C4005 4525 TRACTOR
MAHINDRA TRACTOR HYDRAULIC PUMP FOR 4505 5005 C4005 4525 TRACTOR
$500.00
Time Remaining: 17h 50m
Buy It Now for only: $500.00

CASE IH TRACTOR HYDRAULIC PUMP
CASE IH TRACTOR HYDRAULIC PUMP
$140.00
Time Remaining: 17h 52m
Buy It Now for only: $140.00

70931C91 Case IH Farmall Hydraulic Pump 12GPM 186 1086 1486 1586 786 886 986
70931C91 Case IH Farmall Hydraulic Pump 12GPM 186 1086 1486 1586 786 886 986
$489.99
Time Remaining: 18h 4m
Buy It Now for only: $489.99

MAHINDRA TRACTOR HYDRAULIC PUMP FOR 475 TRACTOR
MAHINDRA TRACTOR HYDRAULIC PUMP FOR 475 TRACTOR
$140.00
Time Remaining: 18h 8m
Buy It Now for only: $140.00

Belarus tractor Hydraulic pump drive 800 820 900 920
Belarus tractor Hydraulic pump drive 800 820 900 920
$89.00
Time Remaining: 18h 43m
Buy It Now for only: $89.00

R79152 John Deere Hydraulic Pump Shaft 3020 4020 4230 4240 4320 4440 540 540B +
R79152 John Deere Hydraulic Pump Shaft 3020 4020 4230 4240 4320 4440 540 540B +
$105.58
Time Remaining: 19h 1m
Buy It Now for only: $105.58

John Deere Hydraulic Pump Coupling L34569
John Deere Hydraulic Pump Coupling L34569
$15.00
Time Remaining: 19h 1m
Buy It Now for only: $15.00

John Deere Hydraulic Pump Coupling L34432
John Deere Hydraulic Pump Coupling L34432
$16.00
Time Remaining: 19h 1m
Buy It Now for only: $16.00

E0NN600AC Hydraulic Economy Pump Fits Ford NH 5100 5110 5600 5610 5900 6600
E0NN600AC Hydraulic Economy Pump Fits Ford NH 5100 5110 5600 5610 5900 6600
$745.08
Time Remaining: 19h 17m
Buy It Now for only: $745.08

E1NN600AA Hydraulic Mounts on Engine Pump Fits Ford NH 3500 3550 4400 4500
E1NN600AA Hydraulic Mounts on Engine Pump Fits Ford NH 3500 3550 4400 4500
$670.65
Time Remaining: 19h 17m
Buy It Now for only: $670.65

E1NN600AA Hydraulic Economy Pump Fits Ford NH 8210
E1NN600AA Hydraulic Economy Pump Fits Ford NH 8210
$670.65
Time Remaining: 19h 17m
Buy It Now for only: $670.65

E2NN600AB Hydraulic Pump Fits Ford NH 340A 340B 345C 345D 445 445A 445C 445D 450
E2NN600AB Hydraulic Pump Fits Ford NH 340A 340B 345C 345D 445 445A 445C 445D 450
$528.60
Time Remaining: 19h 18m
Buy It Now for only: $528.60

1076957M91 Hydraulic Lift Pump Fits Massey Ferguson Tractor 231 240P
1076957M91 Hydraulic Lift Pump Fits Massey Ferguson Tractor 231 240P
$1,097.22
Time Remaining: 19h 19m
Buy It Now for only: $1,097.22

1081639M91 Hydraulic Pump Fits Massey Ferguson 135 150 165 175 178 35 35X 50 65
1081639M91 Hydraulic Pump Fits Massey Ferguson 135 150 165 175 178 35 35X 50 65
$743.65
Time Remaining: 19h 19m
Buy It Now for only: $743.65

New CPA 1061 Sundstrand Sauer Danfoss Sundstrand Hydraulic Gear Pump
New CPA 1061 Sundstrand Sauer Danfoss Sundstrand Hydraulic Gear Pump
$2,911.56
Time Remaining: 19h 44m
Buy It Now for only: $2,911.56

1346425C1 Pump Hydraulic w Gear Pump Reman Fits Case IH 1896 2090 2094 2096 2290
1346425C1 Pump Hydraulic w Gear Pump Reman Fits Case IH 1896 2090 2094 2096 2290
$2,040.26
Time Remaining: 19h 47m
Buy It Now for only: $2,040.26

142867C92 Hydraulic Piston Pump Fits Case IH 5088 5288 5488
142867C92 Hydraulic Piston Pump Fits Case IH 5088 5288 5488
$2,193.39
Time Remaining: 19h 49m
Buy It Now for only: $2,193.39

1543241C1 Hydraulic Pump Fits Case IH Tractor Models 2470 2670
1543241C1 Hydraulic Pump Fits Case IH Tractor Models 2470 2670
$2,512.93
Time Remaining: 19h 49m
Buy It Now for only: $2,512.93

1543242C1 Hydraulic Pump Fits Case IH Tractor 2870 Replaces A150825
1543242C1 Hydraulic Pump Fits Case IH Tractor 2870 Replaces A150825
$2,380.49
Time Remaining: 19h 49m
Buy It Now for only: $2,380.49

MF Hydraulic Pump Piston Ring 892604m1
MF Hydraulic Pump Piston Ring 892604m1
$2.29
Time Remaining: 19h 55m
Buy It Now for only: $2.29

303141764 R Re Mfg Hydraulic Pump Closed Center Fits White 170 1755 1855 1870
303141764 R Re Mfg Hydraulic Pump Closed Center Fits White 170 1755 1855 1870
$1,722.65
Time Remaining: 19h 56m
Buy It Now for only: $1,722.65

303148831 R Re Mfg Hydraulic Pump Closed Center Fits White 100 125 145 160 170
303148831 R Re Mfg Hydraulic Pump Closed Center Fits White 100 125 145 160 170
$1,768.15
Time Remaining: 19h 56m
Buy It Now for only: $1,768.15

638037 Hydraulic Pump Ford New Holland Combine TR75 TR85
638037 Hydraulic Pump Ford New Holland Combine TR75 TR85
$1,401.07
Time Remaining: 20h
Buy It Now for only: $1,401.07

70248735 Hydraulic Pump Triple Stage Fits Allis Chalmers Tractor 190 190XT
70248735 Hydraulic Pump Triple Stage Fits Allis Chalmers Tractor 190 190XT
$1,956.29
Time Remaining: 20h
Buy It Now for only: $1,956.29

70248736 Hydraulic Pump Dual Stange Fits Allis Chalmers Tractor Model 190 190XT
70248736 Hydraulic Pump Dual Stange Fits Allis Chalmers Tractor Model 190 190XT
$2,221.85
Time Remaining: 20h
Buy It Now for only: $2,221.85

70249469 Pump Hydraulic Dual Fits Allis Chalmers 180 185
70249469 Pump Hydraulic Dual Fits Allis Chalmers 180 185
$1,229.22
Time Remaining: 20h
Buy It Now for only: $1,229.22

70249828 Hydraulic Pump Fits Allis Chalmers Tractors 170 175
70249828 Hydraulic Pump Fits Allis Chalmers Tractors 170 175
$2,060.90
Time Remaining: 20h
Buy It Now for only: $2,060.90

70256067 Hydraulic Pump Fits Allis Chalmers Tractors 170 175
70256067 Hydraulic Pump Fits Allis Chalmers Tractors 170 175
$2,060.90
Time Remaining: 20h 1m
Buy It Now for only: $2,060.90

70257005 Hydraulic Pump Dual Fits Allis Chalmers Tractor 190 190XT 200 210 220
70257005 Hydraulic Pump Dual Fits Allis Chalmers Tractor 190 190XT 200 210 220
$1,749.31
Time Remaining: 20h 1m
Buy It Now for only: $1,749.31

70257213 Hydraulic Pump Single Fits Allis Chalmers 190 190XT 200
70257213 Hydraulic Pump Single Fits Allis Chalmers 190 190XT 200
$1,388.88
Time Remaining: 20h 1m
Buy It Now for only: $1,388.88

70269937 Hydraulic PumpSingle Allis Chalmers 7000
70269937 Hydraulic PumpSingle Allis Chalmers 7000
$1,559.24
Time Remaining: 20h 2m
Buy It Now for only: $1,559.24

72074620 Hydraulic Pump Fits Allis Chalmers Tractor 6040
72074620 Hydraulic Pump Fits Allis Chalmers Tractor 6040
$1,054.99
Time Remaining: 20h 6m
Buy It Now for only: $1,054.99

79016058 Hydraulic Pump Fits Allis Chalmers 7000 Replaces 70269936
79016058 Hydraulic Pump Fits Allis Chalmers 7000 Replaces 70269936
$1,749.31
Time Remaining: 20h 6m
Buy It Now for only: $1,749.31

894906M91 Hydraulic Pump O Ring Kit for Massey Ferguson TO35 MF35 NEW
894906M91 Hydraulic Pump O Ring Kit for Massey Ferguson TO35 MF35 NEW
$8.88
Time Remaining: 20h 28m
Buy It Now for only: $8.88

NCA966E New Ford New Holland Tractor Hydraulic Pump Shaft NAA 2000 4000 +
NCA966E New Ford New Holland Tractor Hydraulic Pump Shaft NAA 2000 4000 +
$51.88
Time Remaining: 20h 48m
Buy It Now for only: $51.88

K200465 New Case IH Tractor Hydraulic Pump Drive Coupler w o A C 1594 1690
K200465 New Case IH Tractor Hydraulic Pump Drive Coupler w o A C 1594 1690
$98.99
Time Remaining: 20h 48m
Buy It Now for only: $98.99

F0NN600BB Hydraulic Pump Tandem Gear Fits Ford New Holland 5640 6640 7740 7840
F0NN600BB Hydraulic Pump Tandem Gear Fits Ford New Holland 5640 6640 7740 7840
$903.13
Time Remaining: 20h 49m
Buy It Now for only: $903.13

Daewoo Excavator DH120W Hydrostatic Hydraulic Pump
Daewoo Excavator DH120W Hydrostatic Hydraulic Pump
$5,500.00
Time Remaining: 21h 39m
Buy It Now for only: $5,500.00

IHC Farmall 460 560 706 806 826 856 HYDRAULIC PUMP
IHC Farmall 460 560 706 806 826 856 HYDRAULIC PUMP
$346.99
Time Remaining: 21h 44m
Buy It Now for only: $346.99

7620 110 Eaton Hydrostatic Hydraulic Piston Pump Repair
7620 110 Eaton Hydrostatic Hydraulic Piston Pump Repair
$4,500.00
Time Remaining: 21h 44m
Buy It Now for only: $4,500.00