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.

Jacobsen LF3400 LF3800 Hydrostatic transmission drive pump hydraulic diesel
Jacobsen LF3400 LF3800 Hydrostatic transmission drive pump hydraulic diesel
$400.00
Time Remaining: 1h 8m
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David Brown Tractor Hydraulic Pump  K200330 K919048
David Brown Tractor Hydraulic Pump K200330 K919048
$115.00
Time Remaining: 1h 47m
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Hydrostatic  Aux Hydraulic Pump 95 3450 93 2175 Toro 6500 D Fairway Mower 1553
Hydrostatic Aux Hydraulic Pump 95 3450 93 2175 Toro 6500 D Fairway Mower 1553
$250.00
Time Remaining: 3h 48m
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CASE 220 Tractor Hydraulic Oil Pump Mount
CASE 220 Tractor Hydraulic Oil Pump Mount
$18.19
Time Remaining: 3h 52m
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Hydrostatic Hydraulic Pump 4119327 Jacobsen LF1880 Fairway Mower OilGear
Hydrostatic Hydraulic Pump 4119327 Jacobsen LF1880 Fairway Mower OilGear
$750.00
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Toro Hydraulic Pump 105 9770 NEW
Toro Hydraulic Pump 105 9770 NEW
$188.00
Time Remaining: 7h 7m
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John Deere 2500 Diesel Hydraulic Pump
John Deere 2500 Diesel Hydraulic Pump
$335.00
Time Remaining: 18h 19m
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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
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Fiat Hydraulic Replacement Pump  518071
Fiat Hydraulic Replacement Pump 518071
$396.00
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Pump charge 2510071 Hydro Gear high output hydraulic transaxle transmission
Pump charge 2510071 Hydro Gear high output hydraulic transaxle transmission
$114.00
Time Remaining: 22h 42m
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Case Ingersoll Front cut mower 5020V Hydraulic transmission  hydro pump LH
Case Ingersoll Front cut mower 5020V Hydraulic transmission hydro pump LH
$399.99
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Case Ingersoll Front cut mower 5020V Hydraulic transmission  hydro pump RH
Case Ingersoll Front cut mower 5020V Hydraulic transmission hydro pump RH
$399.99
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Gravely Tractor Mower 8163 B Hydraulic Oil Pump
Gravely Tractor Mower 8163 B Hydraulic Oil Pump
$74.99
Time Remaining: 1d 2h 48m
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John Deere 318 Tractor Hydraulic Hydro Transmission Rear Axle Oil Tube 1084
John Deere 318 Tractor Hydraulic Hydro Transmission Rear Axle Oil Tube 1084
$6.99
Time Remaining: 1d 4h 29m

Bolens Iseki TX1500 G172 Tractor KE75 17hp Diesel Engine Hydraulic Oil Pump Gear
Bolens Iseki TX1500 G172 Tractor KE75 17hp Diesel Engine Hydraulic Oil Pump Gear
$31.84
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Spring kit 70873 RTN CW HVY HYDRO GEAR HYDRAULIC pump transaxle transmission
Spring kit 70873 RTN CW HVY HYDRO GEAR HYDRAULIC pump transaxle transmission
$53.29
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Aux Front Reel Hydraulic Pump AMT1951 John Deere 2500 Greens Mower 2500A 2500B
Aux Front Reel Hydraulic Pump AMT1951 John Deere 2500 Greens Mower 2500A 2500B
$175.00
Time Remaining: 1d 20h 39m
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Hydrostatic Hydraulic Pump AMT2471 John Deere 2500 Greens Mower 2500A 2243
Hydrostatic Hydraulic Pump AMT2471 John Deere 2500 Greens Mower 2500A 2243
$175.00
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1965 CASE Colt Super H Tractor Hydraulic Oil Pump Mount
1965 CASE Colt Super H Tractor Hydraulic Oil Pump Mount
$22.74
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JOHN DEERE HYDRAULIC PUMP LINE METAL HYDRO 7h 17  7h 19
JOHN DEERE HYDRAULIC PUMP LINE METAL HYDRO 7h 17 7h 19
$40.00
Time Remaining: 2d 4h 27m
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Excel Hustler 340 Hydraulic Gear Pump 4500 4600 4300 4400 Wing Mower
Excel Hustler 340 Hydraulic Gear Pump 4500 4600 4300 4400 Wing Mower
$199.99
Time Remaining: 2d 5h 59m
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Jacobsen Greens King IV hydraulic pump
Jacobsen Greens King IV hydraulic pump
$9.99 (1 Bid)
Time Remaining: 2d 9h 5m

Exmark Hydraulic Pump 103 2766
Exmark Hydraulic Pump 103 2766
$525.00
Time Remaining: 2d 21h 25m
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Hydro Gear Hydraulic Pump BDP 10L 117
Hydro Gear Hydraulic Pump BDP 10L 117
$495.00
Time Remaining: 2d 21h 25m
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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: 3d 25m
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JOHN DEERE 317 HYDRAULIC PUMP LINE METAL HYDRO
JOHN DEERE 317 HYDRAULIC PUMP LINE METAL HYDRO
$24.99
Time Remaining: 3d 1h 37m
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CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
CASE Ingersoll 448 Tractor Hydraulic Oil Pump Mount
$27.29
Time Remaining: 3d 21h 49m
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Breather kit 71510 Hydro Gear hydraulic pump transaxle transmission
Breather kit 71510 Hydro Gear hydraulic pump transaxle transmission
$23.89
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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Brake arm 71356 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
Brake arm 71356 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
$17.00
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Seal kit 70312 HYDRO GEAR HYDRAULIC pump transaxle transmission
Seal kit 70312 HYDRO GEAR HYDRAULIC pump transaxle transmission
$21.18
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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
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
$32.18
Time Remaining: 4d 27m
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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
$18.18
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
$30.00
Time Remaining: 4d 27m
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Axle flanged 62681 HYDRO GEAR 210 2500 44356 hydraulic pump transmission
Axle flanged 62681 HYDRO GEAR 210 2500 44356 hydraulic pump transmission
$192.85
Time Remaining: 4d 27m
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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
$21.18
Time Remaining: 4d 27m
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BALL BEARING 50740 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
BALL BEARING 50740 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
$29.89
Time Remaining: 4d 27m
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Bearing cradle 52619 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
Bearing cradle 52619 2EA HYDRO GEAR HYDRAULIC pump transaxle transmission
$12.71
Time Remaining: 4d 27m
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Seal kit 71554 HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
Seal kit 71554 HYDRO GEAR OEM HYDRAULIC pump transaxle transmission
$21.72
Time Remaining: 4d 27m
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Lip seal 45074 10X25X7 4EA HYDRO GEAR HYDRAULIC pump transaxle transmission OEM
Lip seal 45074 10X25X7 4EA HYDRO GEAR HYDRAULIC pump transaxle transmission OEM
$13.18
Time Remaining: 4d 27m
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Seal overhaul 2513013 HYDRO GEAR OEM BDU 10 hydraulic pump transaxle
Seal overhaul 2513013 HYDRO GEAR OEM BDU 10 hydraulic pump transaxle
$17.00
Time Remaining: 4d 27m
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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
$39.99
Time Remaining: 4d 27m
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Seal 70531 OVERHAUL KIT HYDRO GEAR HYDRAULIC pump transaxle transmission
Seal 70531 OVERHAUL KIT HYDRO GEAR HYDRAULIC pump transaxle transmission
$43.00
Time Remaining: 4d 27m
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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
$38.18
Time Remaining: 4d 27m
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Brake arm 70392 51514300 HYDRO GEAR kit right hand 2ea hydraulic pump transaxle
Brake arm 70392 51514300 HYDRO GEAR kit right hand 2ea hydraulic pump transaxle
$14.94
Time Remaining: 4d 27m
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Gasket 50223 HOUSING 1EA HYDRO GEAR hydraulic pump transaxle NLA
Gasket 50223 HOUSING 1EA HYDRO GEAR hydraulic pump transaxle NLA
$22.28
Time Remaining: 4d 27m
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Retaining ring 2000022 5EA HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
Retaining ring 2000022 5EA HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
$15.18
Time Remaining: 4d 27m
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Overhaul seal 70740 00181065 Hydro Gear BDP 16A hydraulic pump transaxle
Overhaul seal 70740 00181065 Hydro Gear BDP 16A hydraulic pump transaxle
$39.89
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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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
$30.18
Time Remaining: 4d 27m
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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: 4d 27m
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Breather assembly 50042 HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
Breather assembly 50042 HYDRO GEAR HYDRAULIC OEM pump transaxle transmission
$39.29
Time Remaining: 4d 27m
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Block cylinder 71579 16CC HYDRO GEAR hydraulic pump transaxle transmission
Block cylinder 71579 16CC HYDRO GEAR hydraulic pump transaxle transmission
$72.29
Time Remaining: 4d 27m
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Axle kit 72181 SHORT HYDRO GEAR HYDRAULIC transmission pump transaxle
Axle kit 72181 SHORT HYDRO GEAR HYDRAULIC transmission pump transaxle
$99.00
Time Remaining: 4d 27m
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Pump charge 53738 kit HYDRO GEAR HYDRAULIC transaxle transmission
Pump charge 53738 kit HYDRO GEAR HYDRAULIC transaxle transmission
$59.89
Time Remaining: 4d 27m
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Bypass actuater 2003555 HYDRO GEAR HYDRAULIC pump transaxle transmission
Bypass actuater 2003555 HYDRO GEAR HYDRAULIC pump transaxle transmission
$23.00
Time Remaining: 4d 27m
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Seal 70853 21543935 AND RETAINING RING HYDRO GEAR hydraulic pump transaxle
Seal 70853 21543935 AND RETAINING RING HYDRO GEAR hydraulic pump transaxle
$37.00
Time Remaining: 4d 27m
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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
$34.16
Time Remaining: 4d 27m
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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
$39.89
Time Remaining: 4d 27m
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FlowTest kit 70661 36INCH HYDRO GEAR HYDRAULIC BDP pump transaxle transmission
FlowTest kit 70661 36INCH HYDRO GEAR HYDRAULIC BDP pump transaxle transmission
$693.24
Time Remaining: 4d 27m
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Gasket 2003067 2EA HYDRO GEAR HOUSING HYDRAULIC pump transaxle transmission
Gasket 2003067 2EA HYDRO GEAR HOUSING HYDRAULIC pump transaxle transmission
$17.18
Time Remaining: 4d 27m
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Gerotor seal 72291 HYDRO GEAR HYDRAULIC PUMP transaxle transmiission
Gerotor seal 72291 HYDRO GEAR HYDRAULIC PUMP transaxle transmiission
$17.18
Time Remaining: 4d 27m
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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
Time Remaining: 4d 27m
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PULLEY 50066 210 3000 HYDRO GEAR hydraulic pump transaxle transmission
PULLEY 50066 210 3000 HYDRO GEAR hydraulic pump transaxle transmission
$30.00
Time Remaining: 4d 27m
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Shaft 51078 axle DD LH Hydro Gear hydraulic pump transaxle transmission OEM
Shaft 51078 axle DD LH Hydro Gear hydraulic pump transaxle transmission OEM
$44.10
Time Remaining: 4d 27m
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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
$90.00
Time Remaining: 4d 27m
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Filter 70380 manifold HYDRO GEAR HYDRAULIC pump transaxle transmission
Filter 70380 manifold HYDRO GEAR HYDRAULIC pump transaxle transmission
$50.00
Time Remaining: 4d 27m
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Grease 5041644835 50297 50299 50412 50414 2EA hydraulic HYDRO GEAR pump NLA
Grease 5041644835 50297 50299 50412 50414 2EA hydraulic HYDRO GEAR pump NLA
$47.00
Time Remaining: 4d 27m
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