Axial piston variable pump A7VO - Livingston & Haven

1 Linear Motion andAssembly TechnologiesServicePneumaticsHydraulicsE lectric Drives and ControlsAxial piston variable pump A7 VOData sheetSeries 63 Sizes NG250 to 500 Nominal pressure 350 barPeak pressure 400 barOpen circuitRE 92203 1/52 Replaces: Features variable Axial piston pump with tapered piston rotary group in bent axis design for hydrostatic drives in open circuits For operation in mobile and industrial applications The flow is proportional to the drive speed and the displace-ment and steplessly variable from qv max to qv min = 0 Wide range of controls and adjustment devices Compact.

2 Robust bearing system for long service life Available with Long Life bearings for special fluids and extreme service life requirements Pressure control is standard Optical or electric swivel angle indicator availableContentsType code for Standard program 2 Technical data 4 Dimensions size 250 10 Dimensions size 250 High-Speed-Version 12 Dimensions size 355 14 Dimensions size 500 16DR Pressure control 18 DRG remote pressure control 20 LRD Power control with integrated pressure control 22 LRG with remote pressure control 26 LRDH with hydraulic stroke limiter 28 LRDN with hydraulic stroke limiter Hydraulic control.

3 Pilot pressure dependent with intrgrated pressure control with remote pressure control Electric control with proportional valve with integrated pressure control with remote pressure control 43 Plug 45 Optical swivel angle indicator 46 Electric swivel angle indicator 47 Installation instructions standard program 48 Installation instructions High-Speed-Version 49 General information 522/52 Bosch Rexroth AG a7vo Baureihe 63 | RE 92203 / Version250 355 50001 Mineral oil and HFD.

4 HFD only in conjunction with Long-Life-Lagerung L (no code) For operation on HFC, special high performance version see RE 92053 High-Speed-Version (only mineral oil) H 1) Axial piston unit02 Bent axis design, variable , nominal pressure 350 bar, peak pressure 400 barA7 VDrive shaft bearings250 355 50003 Mechanical bearings (no code) Long-Life-bearings LType of operation04 Pump, open circuitOSize05 Displacement Vg max [cm3]250 355 500NG28 to160 see RE 92202 Control devices250 355 50006 Pressure control DRPressure control, remotely adjustable DRGP ower controlwith integrated pressure control (fixed setting)

5 LRDhydraulic stroke limiter initial position Vg max p = 10 bar LRDH1 p = 25 bar LRDH2 p = 35 bar LRDH3hydraulic stroke limiter initial position Vg min p = 10 bar LRDN1 p = 25 bar LRDN2 p = 35 bar LRDN3 with pressure control remotely adjustable LRGhydraulic stroke limiter initial position Vg max p = 10 bar LRGH1 p = 25 bar LRGH2 p = 35 bar LRGH3hydraulic stroke limiter initial position Vg min p = 10 bar LRGN1 p = 25 bar LRGN2 p = 35 bar LRGN3 Hydraulic control, pilot pressure dependent,with integrated pressure control (fixed setting) p = 10 bar HD1D p = 25 bar HD2D p = 35 bar HD3 Dwith pressure control, remotely adjustable p = 10 bar HD1G p = 25 bar HD2G p = 35 bar HD3 GHydraulic control, with electric proportional valve 2)with integrated pressure control (fixed setting)Control voltage 12 V EP1 DControl voltage 24 V EP2 Dwith pressure control, remotely adjustableControl voltage 12 V EP1 Gcontrol voltage 24 V EP2G1)

6 Recommended for new projects 2) for operation on HFD-fluids please observe RE 29181 (proportional pressure reducing valve type DRE4K) Type code for standard programA7VO/63 V010203040506070 80 910111213RE 92203 | a7vo Baureihe 63 Bosch Rexroth AG 3/52 Type code for standard programA7VO/63 V010203040506070 80 910111213 Series250 355 50007 Series 6, Index 363 Direction of rotation250 355 50008with view on drive shaftclockwiseRcounter clockwiseLSeals250 355 50009 FKM (Fluoro-rubber)VDrive shaft250 355 50010 Splined shaft to DIN 5480 ZKeyed parallel shaft to DIN 6885 PMounting flange250 355 50011 Similar to ISO 3019-24-hole B8-hole HService line connections250 355 50012 SAE-flanged port B or A, at rear (metric fixing bolts) SAE flanged port S, at rear(metric fixing bolts)01 SAE- flanged ports B or A, on opposite side (metric fixing bolts)SAE- flanged port S, on opposite side (metric fixing bolts)

7 02 Swivel angle indicator250 355 50013 Without swivel angle indicator (no code)With optical swivel angle indicatorVWith electric swivel angle indicatorENoteExact value for Vg min and Vg max (displacement) must be stated in clear text when ordering (Vg min ..cm3/rev., Vg max ..cm3/rev.)Setting range Vg min: 0 to Vg max Vg max: Vg max down to Vg max = Available = Not available = Preferred program4/52 Bosch Rexroth AG a7vo Baureihe 63 | RE 92203 fl uidFor extensive information on the selection of hydraulic fl uids and application conditions please consult our data sheets RE 90220 (mineral oils), RE 90221 (ecologically acceptable fl uids) and RE 90223 (HF-fl uids).

8 The variable pump a7vo is not suitable for operation on HFA fluids. When operating on HFD or ecologically acceptable fluids, limitations to the technical data and seals according to RE 90223 and RE 90221 must be the sizes 250 and 355 with operation on HFC-fluids, the must be used. For certain selected HFC fluids the same pressures and speeds are permissible as for operation on mineral oil. See RE ordering, state the fluid to be used in clear viscosity rangeIn order to obtain optimum effi ciency and service life, we recommend that the operating viscosity (at operating tempera-ture) be selected in the range opt = opt.

9 Viscosity range mm2/sreferred to tank temperature (open circuit).Limit of viscosity rangeFor critical operating conditions the following values apply: min = 10 mm2/s for short periods (t < 3 min) at max. permissible case drain temperature tmax = +90 C. max = 1000 mm2/s for short periods (on cold start maximum operating viscosity of 100 mm2/s should be reached within 15 min) tmin= 25 CNote, that the maximum fluid temperature of 90 C may not be exceeded at any point ( around the bearings).

10 The fluid tem-perature in the bearing area is influenced by drive speed and pressure, and is typically 12 K higher than the average case drain range (see selection diagram)tmin = 25 Ctmax = +90 CFor detailed information on operation with low temperatures see RE diagramTemperaturtmin = 25 Ctmax = + 90 C 25 10 10 20 30 50 70 90 20 0 40 60 80 100 10003616t ( C) 101000600400200100806040201510 VG 22VG 32VG 46VG 100VG 68 Fluid temperature rangeViscosity [mm2/s] optNotes on the selection of hydraulic fluidsIn order to select the correct fl uid, it is necessary to know the operating temperature in the tank (open circuit) in relation to the ambient hydraulic fl uid should be selected so that within the ope-rating temperature range, the viscosity lies within the optimum range ( opt) see shaded section in the selection diagram.