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.

Case 646 Compact Loader Hydraulic Pump Suction Tube
Case 646 Compact Loader Hydraulic Pump Suction Tube
$15.00 (1 Bid)
Time Remaining: 46m

CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
$26.39
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Breather kit 71510 Hydro Gear hydraulic pump transaxle transmission
Breather kit 71510 Hydro Gear hydraulic pump transaxle transmission
$22.39
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TRUNNION ARM 2003005 BD 10 IHT 10CC HYDRO GEAR hydraulic pumps  transaxles
TRUNNION ARM 2003005 BD 10 IHT 10CC HYDRO GEAR hydraulic pumps transaxles
$45.00
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End cap 2513016 HG 2513016 BDP 10 KIT HYDRO GEAR HYDRAULIC pump transaxle
End cap 2513016 HG 2513016 BDP 10 KIT HYDRO GEAR HYDRAULIC pump transaxle
$339.00
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Manifold 51074 auxillary Hydro Gear Hydraulic pump transaxle transmission OEM
Manifold 51074 auxillary Hydro Gear Hydraulic pump transaxle transmission OEM
$59.98
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Swash plate 2513015 HYDRO GEAR OEM 10CC hydraulic pump transaxle transmission
Swash plate 2513015 HYDRO GEAR OEM 10CC hydraulic pump transaxle transmission
$60.00
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Block kit 72228 7 PISTON 8CC HYDRO GEAR HYDRAULIC OEM transaxle pump transmissio
Block kit 72228 7 PISTON 8CC HYDRO GEAR HYDRAULIC OEM transaxle pump transmissio
$33.90
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Gear 50420 spur 60T spline ID HYDRO GEAR hydraulic pump transaxle transmission
Gear 50420 spur 60T spline ID HYDRO GEAR hydraulic pump transaxle transmission
$39.29
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RTN std med 71034 HYDRO GEAR hydraulic pump transaxle transmission
RTN std med 71034 HYDRO GEAR hydraulic pump transaxle transmission
$33.16
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Axle shaft kit 71570 HYDRO GEAR hydraulic pump transmission transaxle
Axle shaft kit 71570 HYDRO GEAR hydraulic pump transmission transaxle
$78.34
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Brake arm 71069 71070 HYDRO GEAR left and right hydraulic pump transaxle
Brake arm 71069 71070 HYDRO GEAR left and right hydraulic pump transaxle
$38.89
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BALL BEARING 50740 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
BALL BEARING 50740 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
$28.39
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End cap 72169 TOP CASE DRNPR HYDRO GEAR HYDRAULIC transaxle pump transmission
End cap 72169 TOP CASE DRNPR HYDRO GEAR HYDRAULIC transaxle pump transmission
$190.00
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Breather assembly 50042 HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
Breather assembly 50042 HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
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Block cylinder 71579 16CC HYDRO GEAR hydraulic pump transaxle transmission
Block cylinder 71579 16CC HYDRO GEAR hydraulic pump transaxle transmission
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End cover 50891RM 1ZT RAW M HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
End cover 50891RM 1ZT RAW M HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
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Auxillary pump BPD 10 70505 SPECIAL ORDER HYDRO GEAR HYDRAULIC transaxle
Auxillary pump BPD 10 70505 SPECIAL ORDER HYDRO GEAR HYDRAULIC transaxle
$199.00
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PULLEY 50066 210 3000 HYDRO GEAR hydraulic pump transaxle transmission
PULLEY 50066 210 3000 HYDRO GEAR hydraulic pump transaxle transmission
$28.50
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Filter 70380 manifold HYDRO GEAR HYDRAULIC pump transaxle transmission
Filter 70380 manifold HYDRO GEAR HYDRAULIC pump transaxle transmission
$50.00
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Block cylinder 2510014 BDU 21P HYDRO GEAR HYDRAULIC pump transaxle transmission
Block cylinder 2510014 BDU 21P HYDRO GEAR HYDRAULIC pump transaxle transmission
$112.00
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Bypass valve 2513030 2EA HYDRO GEAR hydraulic pump transaxle transmission
Bypass valve 2513030 2EA HYDRO GEAR hydraulic pump transaxle transmission
$50.00
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Control arm 70899 HYDRO GEAR hydraulic pump transaxle transmission
Control arm 70899 HYDRO GEAR hydraulic pump transaxle transmission
$28.19
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Housing 71256 HYDRO GEAR hydraulic pump transmission transaxle OEM
Housing 71256 HYDRO GEAR hydraulic pump transmission transaxle OEM
$82.39
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Valve check 2510027 KIT HYDRO GEAR Hydraulic pump transaxle transmission NLA
Valve check 2510027 KIT HYDRO GEAR Hydraulic pump transaxle transmission NLA
$25.38
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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: 1d 2m
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John Deere 300 312 314 317 Hydraulic Transmission Pump Hydro Pump PT Am39998
John Deere 300 312 314 317 Hydraulic Transmission Pump Hydro Pump PT Am39998
$224.99
Time Remaining: 1d 2h 16m
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INGERSOLL 4120 HYDRAULIC POWER STEERING PUMP 4118 4116 4118D
INGERSOLL 4120 HYDRAULIC POWER STEERING PUMP 4118 4116 4118D
$429.99
Time Remaining: 1d 3h 56m
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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
$432.00
Time Remaining: 1d 13h 24m
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CASE 224 220 222 HYDRAULIC PUMP
CASE 224 220 222 HYDRAULIC PUMP
$88.00
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TORO GROUNDSMASTER 3000D 3000 82 contour deck hydraulic pump 98 5156 FREE SHIP
TORO GROUNDSMASTER 3000D 3000 82 contour deck hydraulic pump 98 5156 FREE SHIP
$299.99
Time Remaining: 1d 19h 1m
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Bradley Cliplift Lawn Mower Jack Lift MJ3000 Hydraulic Foot Pump
Bradley Cliplift Lawn Mower Jack Lift MJ3000 Hydraulic Foot Pump
$149.99
Time Remaining: 1d 21h 31m
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Housing 71717 HYDRO GEAR OEM hydraulic pump transaxle transmission
Housing 71717 HYDRO GEAR OEM hydraulic pump transaxle transmission
$72.27
Time Remaining: 1d 23h 3m
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Pump PG 2HBB HB1X XXXX 80400 AE HYDRO GEAR HYDRAULIC transaxle
Pump PG 2HBB HB1X XXXX 80400 AE HYDRO GEAR HYDRAULIC transaxle
$634.60
Time Remaining: 2d 2h 38m
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Pump ZL KMEE 3BLC 2MXX 415464 ZL KMEE 1BLC 2FXX HYDRO GEAR HYDRAULIC transaxle
Pump ZL KMEE 3BLC 2MXX 415464 ZL KMEE 1BLC 2FXX HYDRO GEAR HYDRAULIC transaxle
$794.91
Time Remaining: 2d 2h 38m
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Pump PK 3HCC GY1C XXXX 1004051 050 3050 00 HYDRO GEAR HYDRAULIC transaxle
Pump PK 3HCC GY1C XXXX 1004051 050 3050 00 HYDRO GEAR HYDRAULIC transaxle
$531.05
Time Remaining: 2d 2h 38m
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Pump PG 1KDA D61X XXXX TCA14965 HYDRO GEAR HYDRAULIC transaxle transmission
Pump PG 1KDA D61X XXXX TCA14965 HYDRO GEAR HYDRAULIC transaxle transmission
$465.50
Time Remaining: 2d 2h 38m
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Pump PG 1GCA DY1X XXXX BDP 10A 445 Hydro Gear hydraulic transaxle transmission
Pump PG 1GCA DY1X XXXX BDP 10A 445 Hydro Gear hydraulic transaxle transmission
$472.72
Time Remaining: 2d 2h 38m
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Pump PG 1HRQ DY1X XXXXBDP 10A 403 D18313 65071 HYDRAULIC HYDRO GEAR transaxle
Pump PG 1HRQ DY1X XXXXBDP 10A 403 D18313 65071 HYDRAULIC HYDRO GEAR transaxle
$474.05
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Pump PG 1DQP DY1X XXXX BDP 10A 101 D28227 00D28227 Hydro Gear hydraulic transaxl
Pump PG 1DQP DY1X XXXX BDP 10A 101 D28227 00D28227 Hydro Gear hydraulic transaxl
$474.05
Time Remaining: 2d 2h 38m
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Pump PK 3HPP NB1E XLXX 31490033 HYDRO GEAR HYDRAULIC 12CC transaxle
Pump PK 3HPP NB1E XLXX 31490033 HYDRO GEAR HYDRAULIC 12CC transaxle
$498.29
Time Remaining: 2d 2h 38m
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Pump PW 1LQC EY1X XXXX 21CC BDP 21L 408 VARIABLE HYDRO GEAR HYDRAULIC transaxle
Pump PW 1LQC EY1X XXXX 21CC BDP 21L 408 VARIABLE HYDRO GEAR HYDRAULIC transaxle
$537.70
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Pump PR 1JBC EY1X XXXX BDP 16A 307 48296 HYDRO GEAR HYDRAULIC transaxle
Pump PR 1JBC EY1X XXXX BDP 16A 307 48296 HYDRO GEAR HYDRAULIC transaxle
$502.55
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O ring 54022 5EA Housing round Hydro Gear hydraulic pump transaxle
O ring 54022 5EA Housing round Hydro Gear hydraulic pump transaxle
$35.00
Time Remaining: 2d 4h 1m
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Seal kit 71554 HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
Seal kit 71554 HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
$25.22
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O ring kit 70110 08608300 Hydro Gear 2EA hydraulic pump transaxle transmission
O ring kit 70110 08608300 Hydro Gear 2EA hydraulic pump transaxle transmission
$43.18
Time Remaining: 2d 4h 1m
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O ring seal 9004101 1340 BDP 10EA Hydro Gear hydraulic pump transaxle
O ring seal 9004101 1340 BDP 10EA Hydro Gear hydraulic pump transaxle
$21.68
Time Remaining: 2d 4h 1m
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Seal 70531 OVERHAUL KIT HYDRO GEAR HYDRAULIC pump transaxle transmission
Seal 70531 OVERHAUL KIT HYDRO GEAR HYDRAULIC pump transaxle transmission
$48.00
Time Remaining: 2d 4h 1m
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Lip seal 53901 45076 4ea HYDRO GEAR hydraulic pump transaxle transmission
Lip seal 53901 45076 4ea HYDRO GEAR hydraulic pump transaxle transmission
$37.18
Time Remaining: 2d 4h 1m
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Seal kit 2513043 2EA HYDRO GEAR OEM BDP 10L hydraulic pump transaxle
Seal kit 2513043 2EA HYDRO GEAR OEM BDP 10L hydraulic pump transaxle
$24.68
Time Remaining: 2d 4h 1m
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Seal kit 71410 21543999 HYDRO GEAR hydraulic pump transaxle transmission
Seal kit 71410 21543999 HYDRO GEAR hydraulic pump transaxle transmission
$45.00
Time Remaining: 2d 4h 1m
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Seal kit 70602 2 HYDRO GEAR HYDRAULIC pump transaxle transmission
Seal kit 70602 2 HYDRO GEAR HYDRAULIC pump transaxle transmission
$104.99
Time Remaining: 2d 4h 1m
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Lip seal 50941 21543772 4EA Hydro Gear hydraulic pump transaxle transmission
Lip seal 50941 21543772 4EA Hydro Gear hydraulic pump transaxle transmission
$26.68
Time Remaining: 2d 4h 1m
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Seal kit 71976 ZT 3400 HYDRO GEAR HYDRAULIC pump transaxle transmission
Seal kit 71976 ZT 3400 HYDRO GEAR HYDRAULIC pump transaxle transmission
$44.99
Time Remaining: 2d 4h 1m
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Gasket 50223 HOUSING 1EA HYDRO GEAR hydraulic pump transaxle NLA
Gasket 50223 HOUSING 1EA HYDRO GEAR hydraulic pump transaxle NLA
$25.78
Time Remaining: 2d 4h 1m
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Seal kit 71964 TANDEM PCT HYDRO GEAR hydraulic pump transaxle transmission
Seal kit 71964 TANDEM PCT HYDRO GEAR hydraulic pump transaxle transmission
$52.18
Time Remaining: 2d 4h 1m
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Gear 44353 11T INPUT 210 2500 Hydraulic pump transaxle transmission
Gear 44353 11T INPUT 210 2500 Hydraulic pump transaxle transmission
$54.89
Time Remaining: 2d 4h 1m
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Seal 2510073 BDP 21L over haul Hydro Gear hydraulic pump transaxle transmission
Seal 2510073 BDP 21L over haul Hydro Gear hydraulic pump transaxle transmission
$44.89
Time Remaining: 2d 4h 1m
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O ring square 51016 4EA Hydro Gear 1X2487 hydraulic pump transaxle
O ring square 51016 4EA Hydro Gear 1X2487 hydraulic pump transaxle
$35.18
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Lip seal 50751 21543758 4EA Hydro Gear 25X47X7 hydraulic pump transaxle
Lip seal 50751 21543758 4EA Hydro Gear 25X47X7 hydraulic pump transaxle
$21.68
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Seal KIT 70463 HYDRO GEAR OEM CONVERSION hydraulic pump transaxle NLA
Seal KIT 70463 HYDRO GEAR OEM CONVERSION hydraulic pump transaxle NLA
$95.00
Time Remaining: 2d 4h 1m
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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: 2d 4h 59m
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Lip seal 70541 Hydro Gear 4EA hydraulic pump transaxle transmission
Lip seal 70541 Hydro Gear 4EA hydraulic pump transaxle transmission
$38.18
Time Remaining: 2d 11h 53m
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Lip seal 53699 4 EA TC4 10 X 206 Hydro Gear hydraulic pump transaxle
Lip seal 53699 4 EA TC4 10 X 206 Hydro Gear hydraulic pump transaxle
$38.08
Time Remaining: 2d 11h 53m
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Lip seal 51140 4EA 18X32X7 Hydro Gear hydraulic pump transaxle transmission
Lip seal 51140 4EA 18X32X7 Hydro Gear hydraulic pump transaxle transmission
$27.50
Time Remaining: 2d 11h 53m
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Lip seal 51280 3EA 25X52X7 Hydro Gear hydraulic pump transaxle transmission
Lip seal 51280 3EA 25X52X7 Hydro Gear hydraulic pump transaxle transmission
$24.68
Time Remaining: 2d 11h 53m
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Hub kit 71446 21544061 4BOLT HYDRO GEAR HYDRAULIC pump transaxle transmission
Hub kit 71446 21544061 4BOLT HYDRO GEAR HYDRAULIC pump transaxle transmission
$49.00
Time Remaining: 2d 14h 17m
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SHOCK VALVE 70741 HYDRO GEAR BLANK ORIFICE hydraulic pumps  transaxles
SHOCK VALVE 70741 HYDRO GEAR BLANK ORIFICE hydraulic pumps transaxles
$49.00
Time Remaining: 2d 14h 17m
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Seal 70602 3 KIT HYDRO GEAR OEM HGM E SERIES hydraulic pump transaxle
Seal 70602 3 KIT HYDRO GEAR OEM HGM E SERIES hydraulic pump transaxle
$99.00
Time Remaining: 2d 14h 17m
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Seal kit 70312 HYDRO GEAR HYDRAULIC pump transaxle transmission
Seal kit 70312 HYDRO GEAR HYDRAULIC pump transaxle transmission
$24.68
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Pump charge 53738 kit HYDRO GEAR HYDRAULIC transaxle transmission
Pump charge 53738 kit HYDRO GEAR HYDRAULIC transaxle transmission
$59.89
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Pump charge 2513027 HYDRO GEAR HYDRAULIC pump transaxle transmission
Pump charge 2513027 HYDRO GEAR HYDRAULIC pump transaxle transmission
$75.65
Time Remaining: 2d 14h 22m
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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
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Brake arm 71088 RIGHT HAND 2 EA HYDRO GEAR HYDRAULIC pump transaxle transmission
Brake arm 71088 RIGHT HAND 2 EA HYDRO GEAR HYDRAULIC pump transaxle transmission
$27.50
Time Remaining: 2d 14h 22m
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Filter 2510090 2 EA HYDRO GEAR OEM hydraulic pump transaxle transmission
Filter 2510090 2 EA HYDRO GEAR OEM hydraulic pump transaxle transmission
$39.00
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Pump charge 70402 relief valveon 2ea Hydro Gear hydraulic transaxle transmissi
Pump charge 70402 relief valveon 2ea Hydro Gear hydraulic transaxle transmissi
$27.49
Time Remaining: 2d 14h 22m
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