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6A15VSO, A15VLO series 10 Axial piston variable pumpShaft sealFiltration of the hydraulic fluidFiner filtration improves the cleanliness level of the hydraulic fluid, which increases the service life of the axial pistonunit.To ensure the functional reliability of the axial piston unit,a gravimetric analysis of the hydraulic fluid is necessary todetermine the amount of solid contaminant and to determine the cleanliness level according to ISO 4406. A cleanliness level of at least 20/18/15 is to be maintained.At very high hydraulic fluid temperatures 195 F to maximum 240 F (90 C to maximum 115 C), a cleanliness levelof at least 19/17/14 according to ISO 4406 is necessary.If the above classes cannot be achieved, please contact us.Shaft sealThe FKM shaft seal may be used for case drain temperatures from -13 F to 240 F (-25 C to 115 C).NoteFor application cases below -13 F (-25 C), an NBR shaftseal is required (permissible temperature range -40 F to 195 F (-40 C to 90 C); ordering code digit 14, K).Please contact us.Charge pump (impeller)The charge pump is a circulating pump with which theA15VLO is boosted at the pump inlet and therefore can beoperated at higher speeds. This also simplifies cold startingat low temperatures and high viscosity of the hydraulicfluid. An external inlet pressure increase is therefore unnecessary in most cases. Charging the reservoir with compressed air is not permissible.Vg maxVg minMA A PSMBosch Rexroth AG, RA-A 92800/11.2013T1 T2 T3

Axial piston variable pump A15VSO, A15VLO series 10Operating pressure range7Operating pressure rangePressure at service line port ADefinitionNominal pressure pnom5100 psi (350 bar) absoluteThe nominal pressure corresponds to the maximum design pressure.Maximum pressure pmax6100 psi (420 bar) absoluteThe maximum pressure corresponds to the maximum operating pressurewithin the single operating period. The sum of the single operating periodsmust not exceed the total operating period.Single operating period10 sTotal operating period300 hMinimum pressure pA abs(high-pressure side)220 psi (15 bar)Minimum pressure on the high-pressure side (A) which is required in orderto prevent damage to the axial piston unit. Please contact us about operationat low pressure.Rate of pressure change RA max232000 psi/s (16000 bar/s)Maximum permissible rate of pressure build-up and reduction during a pressure change over the entire pressure range.Pressure at suction port S(inlet)Version without charge pumpMinimum pressure pS min 12 psi (0.8 bar) absoluteMaximum pressure pS max 435 psi (30 bar) absoluteMinimum pressure at suction port S (inlet) which is required in order toavoid damage to the axial piston unit. The minimum pressure depends on thespeed and displacement of the axial piston unit.Version with charge pumpMinimum pressure pS min 10.5 psi (0.7 bar) absoluteMaximum pressure pS max 30 psi (2 bar) absoluteCase drain pressure at port T1, T2, T3Maximum pressure pL max Rate of pressure change RA max60 psi (4 bar) absoluteMaximum 18 psi (1.2 bar) higher than inlet pressure at port S,but not higher than pL max.A case drain line to the reservoir is required. Pressure definitionpnomSingle operating period t1tnMaximum pressure pmaxNominal pressure pnomPressure pPressure pΔtt2ΔpTime tMinimum pressure (high-pressure side)Time tTotal operating period t1 t2 . tnNoteOperating pressure range valid when using hydraulicfluids based on mineral oils. Values for other hydraulicfluids, please contact us.RA-A 92800/11.2013, Bosch Rexroth AG

8A15VSO, A15VLO series 10 Axial piston variable pumpTechnical dataTechnical dataWithout charge pump (A15VSO)SizeNGDisplacement geometric, per revolutionVg 0175.0210.0280.03Vg minVg mumrotational speed2)nnomrpm24002300215021001800at Vg Vg max4)nmaxrpm28002600250025002300Flowat nnom and Vg 45394atPowerat nnom, Vg maxand Δp 5100 psi (350 bar)PhpkW154195219257294Torqueat Vg maxand Δp 5100 psi (350 ary stiffness –drive shaft1 3/4 in 13T 8/16 4‒3827952 in 15T 8/16 DP2 1/4 in 17T 8/16 89kNm/rad‒‒‒‒6202 inMoment of inertia for rotary 74656298560950144200Maximum angular acceleration5)αrad/s²Case 174214245315kg647997111143Weight (without through drive) approx.1)2)3)mMooring function (overcenter) possible up to –100% Vg max.The values are valid:– for the optimum viscosity range fromνopt 170 to 74 SUS (36 bis 16 mm2/s)– with hydraulic fluid based on mineral oilsThe values are valid at absolute pressure pabs 15 psi (1 bar) atsuction port S.Bosch Rexroth AG, RA-A 92800/11.20134)5)Maximum rotational speed (rotational speed limit) in the case ofincreasing the inlet pressure pabs at suction port S and Vg Vg max,see diagram on page 10.The data are valid for values between the minimum required andmaximum permissible speed. Valid for external excitation (e. g. engine 2 to 8 times rotary frequency; cardan shaft twice the rotaryfrequency). The limit value applies for a single pump only. The load capacity of the connection parts must be considered.

Axial piston variable pump A15VSO, A15VLO series 10Technical data9With charge pump (A15VLO)SizeNGDisplacement geometric, per revolutionVg maxin33Vg minVg ional speed2)atnnomrpm2600250025002300at Vg Vg max4)nmaxrpm2600250025002300Flowat nnom and Vg 4kW2202553063765967198631151at nnom, Vg maxand Δp 5100 psi (350 bar)PTorqueat Vg maxand Δp 5100 psi (350 bar)3)Tlb-ftNm80897511701560Rotary stiffness –drive shaft1 3/4 in 13T 8/16 DPT1clb-ft/rad173327‒‒‒2 in 15T 8/16 DPT2c2 1/4 in 17T 8/16 DPT3cPowerØ45B1Ø50B2ccØ60B4c2 dkNm/radMoment of inertia for rotary 19kgm20.0350.0450.060.097Maximum angular accelerationαrad/s²6298560950144200Case volumeVgal0.770.950.981.48L2.93.63.75.6Weight (without through drive) approx.mlbs203243276326kg921101251481)2)3)Mooring function (overcenter) possible up to –100% Vg max.The values are valid:– for the optimum viscosity range fromνopt 170 to 74 SUS (36 bis 16 mm2/s)– for hydraulic fluids based on mineral oilThe values are valid at absolute pressure pabs 15 psi (1 bar) atsuction port S.4)5)Maximum rotational speed (rotational speed limit) in the case ofincreasing the inlet pressure pabs at suction port S and Vg Vg max,see diagram on page 10.The data are valid for values between the minimum required andmaximum permissible speed. Valid for external excitation (e. g. engine 2 to 8 times rotary frequency; cardan shaft twice the rotaryfrequency). The limit value applies for a single pump only. The load capacity of the connection parts must be considered.RA-A 92800/11.2013, Bosch Rexroth AG

10A15VSO, A15VLO series 10 Axial piston variable pumpTechnical data Maximum permissible rotational speed (rotational speed limit)(ps inlet pressure [psi (bar)])Rotational speed n / nnom1.2ps abs 18 (1.2)1.1ps abs 15 (1.0)1.0Determining the operating characteristicsFlowqv TorqueT PowerP Flowqv TorqueT PowerP Vg n ηvVg Δp0.70.80.91.0Displacement Vg / Vg max[lb-ft]24 π ηmh2π T n 33000qv Δp[hp]1714 ηtVg n ηv[L/min]1000ps abs 12 (0.8)0.90.6[gpm]231Vg Δp[Nm]20 π ηmh2π T n 60000qv Δp[kW]600 ηtKeyVgDisplacement per revolution [in3 (cm3)] Δp Differential pressure [psi (bar)]n Rotational speed [rpm]ηv Volumetric efficiencyηmh Mechanical-hydraulic efficiencyηt Total efficiency (ηt ηv ηmh)Permissible radial and axial forces of the drive shaftsSizeNGDrive shaftMaximum radialforce at distance a(from shaft collar)FqaMaximum axial forceFq maxa Fax max Fax – Fax max110145145175175210210280280in DIA 1.771101 3/41.971 3/41.9721.9722.362 1/4mm 600600650650700700850850Note Theoretical values, without efficiency and tolerances;values rounded Operation above the maximum values or below theminimum values may result in a loss of function, areduced service life or in the destruction of the axialpiston unit. We recommend testing the loading bymeans of experiment or calculation / simulation andcomparison with the permissible values. Special requirements apply in the case of belt drives.Please contact us.Bosch Rexroth AG, RA-A 92800/11.2013

Axial piston variable pump A15VSO, A15VLO series 10Technical data11Permissible input and through-drive torquesSizeNGTorqu at Vg max and Δp 5100 psi (350 bar)1)TmaxInput torque at drive shaft, –lb-ft––19691969–Nm––26702670–2)T11 3/4 in 13T 8/16DPTE maxT22 in 15T 8/16DPTE maxT32 1/4 in 17T 8/16DPB1TE maxTE maxØ 45B2Ø 50TE maxB4Ø 60TE maxL22 inTE maxTD maxMaximum through-drive torque Torque 225External control pressure supplyT1(ordering code position 08 B and C)T2Control systems with external control pressure supply needa volume flow appropriate to the adjustment time and size.TE1st pump2nd pumpT3TDTorque at 1st pumpT1Torque at 2nd pumpT2Torque at 3rd pumpT3Input torqueTE T1 T2 T3TE TE maxTD T2 T3TD TD maxThrough-drive torque1)2)SizeMaximum flow [gpm (l/min)]1102.64 (10)1453.43 (13)1753.70 (14)2104.49 (17)2805.81 (22)Efficiency not consideredFor drive shafts without radial forceRA-A 92800/11.2013, Bosch Rexroth AG

12A15VSO, A15VLO series 10 Axial piston variable pumpPower controllerPower controller Schematic LRLR – Power controller, fixed settingThe power controller regulates the displacement of thepump depending on the operating pressure so that a givendrive power is not exceeded at constant drive speed.The precise control with a hyperbolic control characteristic,provides an optimum utilization of available power.The operating pressure acts on a rocker via a measuringspool which moves with the control. An externally adjustable spring force counteracts this, it determines the powersetting. The depressurized basic position is Vg max.If the operating pressure exceeds the set spring force, thecontrol valve will be actuated by the rocker and the pumpwill swivel back from the basic position Vg max toward Vg min.MA A PVg minHere, the leverage at the rocker may be shortened and theoperating pressure may rise in the same relation as thedisplacement is reduced (pB Vg constant; pB operatingpressure; Vg displacement).The hydraulic output power (characteristic LR) is influenced by the efficiency of the pump.Vg maxSetting range for beginning of control 725 psi (50 bar)1) upto 5100 psi (350 bar).When ordering, state in plain text:S MS Drive power P [hp (kW)] Drive speed n [rpm] Maximum flow qV max [gpm (l/min)]Please contact us if you need a power diagram. Characteristic LROperating pressure pB5100 psi(350 bar)725 psi(50 bar)Vg min1)DisplacementSmaller values on requestBosch Rexroth AG, RA-A 92800/11.2013Vg maxMT1 T2 T3

Axial piston variable pump A15VSO, A15VLO series 10Power controllerL4 – Power controller, electric-proportional override13 Schematic L4(negative control)A control current acts against the mechanical powercontroller adjustment spring via a proportional solenoid.The mechanically adjusted basic power setting can bereduced by means of different control current settings.Increasing control current reduced power.The following amplifiers are recommended for industrialapplications and are available for controlling the proportional solenoids: Analog amplifier VT-VSPA1-1data sheet 30111 Digital amplifier VT-VSPD-1data sheet 30523MA A PFurther information can also be found on the internet atTechnical data, solenoidL4Voltage24 V ( 20 %)Vg log/Beginning of control200 mAEnd of control600 mALimiting currentVg maxControl current0.77 ANominal resistance (at 68 F (20 C))22.7 ΩDither frequency100 HzDuty cycle100 %S MSMT1 T2 T3Type of protection see connector version page 54Change in beginning of control in bar when control currentWhen ordering, state in plain text:is changed from minimum to maximum. Drive power P [hp (kW)] at beginning of controlSize Drive speed n [rpm]Δp Beginning of control in control rangeL4 Maximum flow qV max [gpm (l/min)]200 to 600 mAOperating pressure pB Effect of power override with increasing current1103120 psi (215 bar)1452860 psi (197 bar)1753350 psi (230 bar)2103150 psi (216 bar)2802850 psi (196 bar)NoteFor de-energized operating conditions: Beginning of control increase 725 psi ( 50 bar)725 psi(50 bar)Vg min1)DisplacementVg maxSmaller values on requestRA-A 92800/11.2013, Bosch Rexroth AG

14A15VSO, A15VLO series 10 Axial piston variable pumpPower controllerCR – Summation power-control of two power-controlled Schematic CRpumps, high-pressure-related override (with stop)CRWith two pumps of the same size working in differentcircuits, the CR controller limits the overall power.The CR works like the normal LR with a fixed maximumpower setting along the power hyperbola. The high-pressurerelated override reduces the power setpoint in dependenceon the operating pressure of the other pump. That happensproportionally below the beginning of control and isblocked by a stop when the minimum power is reached.Here, the CR port of the one pump has to be connected tothe MA port of the other pump.The maximum power of the first pump is reached when thesecond pump is working at idle when depressurized. WhenMA A Pdefining the maximum power, the idle power of the secondVg minpump has to be taken into account.The minimum power of each pump is reached when bothpumps are working at high pressure. The minimum powerusually equates to 50% of the total power.Power that is released by the pressure control or otherVg maxoverrides remains unconsidered.Setting range for beginning of control 725 psi (50 bar)1) upto 4350 psi (300 bar).When ordering, please state separately for each pump:S MSMT1 T2 T3 Maximum drive power Pmax [hp (kW)] Minimum drive power Pmin [hp (kW)] Effect of power override of a pump withincreasing pressure in the 2nd pump Drive speed n [rpm] Maximum flow qV max [gpm (l/min)]Operating pressure pB [bar]4350 psi(300 bar)725 psi(50 bar)Vg min725 psi(50 bar)Vg min1)Operating pressure pB [bar] Characteristic CRDisplacementSmaller values on requestBosch Rexroth AG, RA-A 92800/11.2013Vg maxDisplacementVg max

Axial piston variable pump A15VSO, A15VLO series 10Power controllerPR – Summation power-control of one power-controlled15 Schematic PRand one fixed pumpPRTogether with the mounted fixed pump, the PR controlleron an A15VSO or A15VLO effects a limitation of the overallpower.The PR works like the normal LR with a fixed maximumpower setting along the power hyperbola. The high-pressure-dependent override reduces the power specificationin proportion to the operating pressure of the fixed pump.Here, port PR of the A15VSO or A15VLO must be connected to the operating pressure of the fixed pump.The power of the controlled pump can then be reduced tozero in a borderline case.The maximum power of the controlled pump is reachedMA A Pwhen the fixed pump works at idle when depressurized.Vg minWhen defining the maximum power, the idle power of thefixed pump has to be taken into account.Power that is released by the pressure control or otheroverrides remains unconsidered.Setting range for beginning of control 725 psi (50 bar)1) upVg maxto 5100 psi (350 bar)When ordering, state in plain text: Maximum drive power Pmax [hp (kW)]S MS Drive speed n [rpm]MT1 T2 T3 Maximum flow qV max [gpm (l/min)] Size of fixed pump Effect of power override of a pump with increasing pressure inthe 2nd pump Characteristic PROperating pressure pBOperating pressure pB5100 psi(350 bar)725 psi(50 bar)725 psi(50 bar)Vg min1)DisplacementVg minDisplacementVg maxVg maxSmaller values on requestRA-A 92800/11.2013, Bosch Rexroth AG

16A15VSO, A15VLO series 10 Axial piston variable pumpStroke controlStroke controlE2 – Stroke control, electric-proportionalThe following amplifiers are recommended for industrial(positive control)applications and are available for controlling the propor-With the electric stroke control with proportional solenoid,tional solenoids:the pump displacement is infinitely variable in proportion Analog amplifier VT-VSPA1-1data sheet 30111to the current by means of magnetic force. Analog amplifier module VT-MSPA1data sheet 30224Basic position without pilot signal is Vg min. This includes Digital amplifier VT-VSPD-1data sheet 30523the mechanically depressurized basic position Vg min (seeFurther information can also be found on the internet atordering code digit alog/With increasing control current the pump swivels to aTechnical data, solenoidE2higher displacement (from Vg min to Vg max).Voltage24 V ( 20 %)The necessary control fluid is taken from the operatingControl currentpressure or the external control pressure applied to port P.In order for the pump to be moved from the basic positionBeginning of control at Vg min200 mAEnd of control at Vg max600 mA1)zero or at low operating pressure, port P must be suppliedLimiting currentwith external control pressure of at least 435 psi (30 bar),Nominal resistance (at 68 F (20 C))22.7 Ωmaximum 725 psi (50 bar).Dither frequency100 HzNoteDuty cycle100 %If there is no external control pressure applied to P, theType of protection see connector version page 540.77 Aversion "Maximum swivel angle (Vg max), without externalcontrol pressure

Bosch Rexroth AG, RA-A 92800/11.2013 4 A15VSO, A15VLO series 10 Axial piston variable pump Ordering code Drive shaft (for permissible input torque, see page 11) 110 145 175 210 280 16 Splined shaft ANSI B92.1a 1 3/4 in 13T 8/16 DP ‒‒ ‒T1 2 in 15T 8/16 DP ‒‒ ‒ T2 2 1/4 in 17T 8/16 DP ‒‒‒‒ T3 Parallel keyed shaft