Axial piston variable motor A6VM series 71. Americas. RE-A Edition: Replaces:

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1 xial piston variable motor 6VM series 71 mericas RE Edition: Replaces: Sizes 60 to 215 Nominal pressure 6500 psi (450 bar) Maximum pressure 7250 psi (500 bar) Open and closed circuits Features Variable motor with axial tapered piston rotary group of bent-axis design, for hydrostatic drives in open and closed circuit For use in mobile and stationary applications The wide control range enables the variable motor to satisfy the requirement for high speed and high torque. The displacement can be infinitely varied from V g max to V g min = 0. The output speed is dependent on the flow of the pump and the displacement of the motor. The output torque increases with the pressure differential between the high and low-pressure side and with increasing displacement. Wide control range with hydrostatic transmissions Wide selection of control devices Cost savings through elimination of gear shifts and possibility of using smaller pumps Compact, robust motor with long service life High power density ood starting efficiency Version with 9-piston rotary group ood low speed characteristics High uniformity Contents Type code 2 Hydraulic fluids 5 Flow direction 6 Shaft seal 6 Operating pressure range 7 Technical data 8 HP Proportional hydraulic control 10 EP Proportional electric control 13 HZ Two-point hydraulic control 15 EZ Two-point electric control 16 H utomatic high-pressure related control 17 D utomatic speed-related control 22 Electric travel direction valve (for D, H.R) 24 Dimensions size Dimensions size Dimensions size Dimensions size Dimensions size Dimensions size Dimensions size Connector for solenoids 62 Flushing and boost pressure valve 63 Counterbalance valve VD and VE 65 Speed sensor 69 Setting range for displacement 70 Installation instructions 72 Project planning notes 74 Safety instructions 75 RE / , osch Rexroth Corp.

2 2 6VM series 71 xial piston variable motor Type code Type code V M 0 0 / 71 W V 0 xial piston unit 01 ent-axis design, variable, nominal pressure 6500 psi (450 bar), maximum pressure 7250 psi (500 bar) 6V Operating mode 02 Motor M Size (N) 03 eometric displacement, see technical data on page 8 in cm 3 /rev in in 3 /rev Control device Proportional control positive control Δp St = 145 psi (10 bar) HP1 hydraulic Δp St = 365 psi (25 bar) HP2 negative control Δp St = 145 psi (10 bar) HP5 Proportional control electrical Two-point control hydraulic Two-point control electrical utomatic control high-pressure related, Positive control utomatic control speed related, negative control p St / p HD = 5/100 Δp St = 365 psi (25 bar) HP6 positive control = 12 V DC EP1 = 24 V DC EP2 negative control = 12 V DC EP5 = 24 V DC EP6 negative control HZ5 HZ7 negative control = 12 V DC EZ5 = 24 V DC EZ6 = 12 V DC EZ7 = 24 V DC EZ8 with minimum pressure Δp approx. 145 psi (10 bar) H1 increase with pressure increase Δp = 1450 psi (100 bar) H2 hydr. travel direction valve D0 electric travel direction = 12 V DC D1 valve + electric V g max = 24 V DC circuit D2 Pressure control/override Without pressure control/override 00 Pressure control fixed setting, only for HP5, HP6, EP5 and EP6 D1 Override hydraulic remote control, proportional T3 of controls electric, two-point = 12 V DC 1 H1 and H2 = 24 V DC 2 electric and travel = 12 V DC R1 direction valve, electric = 24 V DC R2 Connector for solenoids 1) (see page 62) 06 Without connector (without solenoid, only for hydraulic control) 0 DETSCH - molded connector, 2-pin, without suppressor diode P = vailable = On request = Not available 1) Connectors for other electric components can deviate. osch Rexroth Corp., RE /

3 xial piston variable motor 6VM series 71 Type code V M 0 0 / 71 W V 0 dditional function 1 07 Without additional function 0 dditional function 2 08 Without additional function 0 Response time damping (for selection, see control) 09 Without damping (standard with HP and EP) 0 Damping HP, EP, HP5,6D. and EP5,6D., HZ, EZ, H with counterbalance valve VD/VE 1 One-sided in inlet to large stroking chamber (H) 4 One-sided in outlet from large stroking chamber (D) 7 Setting range for displacement 2) 10 V g max -setting screw V g min -setting screw Without setting screw short (0-adjustable) medium long C extra long D Short short (0-adjustable) E medium F long extra long H Medium short (0-adjustable) J medium K long L extra long M Series 11 Series 7, index 1 71 Configuration of ports and fastening threads 12 NSI, port threads with O-ring sealing according to ISO Direction of rotation 13 Viewed on drive shaft, bidirectional W Sealing material 14 FKM (fluoroelastomer) V Drive shaft bearing 15 Standard bearing 0 Mounting flange SE J C C D E4 = vailable = On request = Not available 2) The settings for the setting screws can be found in the table (see pages 70 and 71). RE / , osch Rexroth Corp.

4 4 6VM series 71 xial piston variable motor Type code V M 0 0 / 71 W V 0 Drive shaft Splined shaft NSI 92.1a 1 1/4 in 142/24 DP S7 1 1/2 in 172/24 DP S9 1 3/4 in 13T 8/16 DP T1 2 in 15T 8/16 DP T2 Port plate for working ports SE working ports and at rear 1 SE working ports and at side, opposite 2 Port plate with 1-stage pressure limitation valves for mounting a counterbalance valve 3) VD20 7 VD25, VE25 8 Valve (see pages 63 to 68) Without valve 0 With counterbalance valve VD/VE mounted 4) W With flushing and boost pressure valve, mounted Flushing on both sides Flushing flow at: Δp = p ND p = 365 psi (25 bar) and ν = 60 SS (10 mm 2 /s) (p ND = low pressure, p = case pressure) Only possible with port plates 1 and 2 Flushing flow q v [gpm (l/min)] 0.9 (3.5) 1.3 (5) 2.1 (8) C 2.6 (10) D 3.7 (14) F 4.0 (15) 5) 4.8 (18) 5) I 5.5 (21) 5) J 7.1 (27) 5) K 8.2 (31) 5) L 9.7 (37) M Speed sensor (see page 69) Without speed sensor 0 Prepared for speed sensor DSM/DS With speed sensor DSM/DS mounted 6) V Standard / special version 21 Standard version 0 Standard version with installation variants, e. g. T ports against standard open and closed Special version Y S = vailable = On request = Not available Notes Note the project planning notes on page 74. When ordering, please provide the relevant technical data additionally to the type code 3) Only possible in conjunction with HP, EP and H control. Note the restrictions described on page 65. 4) State ordering code for counterbalance valve separately in accordance with data sheet for VD or for VE. Note the restrictions described on page 65. 5) Not for EZ7, EZ8 and HZ7. 6) State ordering code for sensor separately in accordance with data sheet for DSM or for DS and note the requirements relating to the electronics. osch Rexroth Corp., RE /

5 xial piston variable motor 6VM series 71 Hydraulic fluids 5 Hydraulic fluids The variable motor 6VM is designed for operation with mineral oil HLP according to DIN pplication instructions and requirements for hydraulic fluids should be taken from the following data sheets before the start of project planning: 90220: Hydraulic fluids based on mineral oils and related hydrocarbons 90221: Environmentally acceptable hydraulic fluids 90222: Fire-resistant, water-free hydraulic fluids (HFDR/HFD) 90223: Fire-resistan, water-containing hydraulic fluids (HFE, HFS, HF, HFC) Details regarding the selection of hydraulic fluid The hydraulic fluid should be selected such that the operating viscosity in the operating temperature range is within the optimum range (ν opt see selection diagram). Note t no point of the component may the temperature be higher than 240 F (115 C). The temperature difference specified in the table is to be taken into account when determining the viscosity in the bearing. If the above conditions cannot be maintained due to extreme operating parameters, we recommend flushing the case at port or using a flushing and boost pressure valve (see page 63). Viscosity and temperature of hydraulic fluids Viscosity Temperature Comment Cold start ν max 7400 SS (1600 mm 2 /s) θ St 40 F ( 40 C) t 3 min, n 1000 rpm, without load p 725 psi (p 50 bar) Permissible temperature difference ΔT 45 F (25 K) between axial piston unit and hydraulic fluid in the system Warm-up phase ν < 7400 to 1850 SS (1600 to 400 mm 2 /s) θ = 40 F to 13 F ( 40 C to 25 C) at p 0.7 p nom, n 0.5 n nom and t 15 min Continuous operation Short-term operation ν = 1850 to 47 SS (400 to 10 mm 2 /s) ν opt = 167 to 81 SS (36 to 16 mm 2 /s) ν min 49 SS (7 mm 2 /s) This corresponds, for example on the V 46, to a temperature range of +41 F to F (+5 C to +85 C)(see selection diagram) θ = 13 F to +217 F measured at port T ( 25 C to +103 C) Note the permissible temperature range of the shaft seal (ΔT = approx. 22 F (12 K) between the bearing/shaft seal and port T) Range of optimum operating viscosity and efficiency t < 3 min, p < 0.3 p nom Selection diagram Maximum permissible viscosity for cold start Range of optimum operating viscosity ν opt Optimum efficiency Continuous operation (1600) (1000) (600) (400) (200) (100) (60) (40) (36) (20) (16) (10) Warm-up phase V 22 V 32 V 68 V 46 V 100 Viscosity ν [SS (mm 2 /s)] Minimum permissible viscosity for short-term operation 50 (7) ( 40) ( 25) ( 10) (0) (10) (30) (50) (70) (90) (115) Minimum permissible temperature for cold start Temperature θ [ F ( C)] RE / , osch Rexroth Corp.

6 6 6VM series 71 xial piston variable motor Flow direction Filtration of the hydraulic fluid Finer filtration improves the cleanliness level of the hydraulic fluid, which increases the service life of the axial piston unit. cleanliness level of at least 20/18/15 is to be maintained according to ISO t very high hydraulic fluid temperatures (195 F (90 C) to maximum 217 F (103 C), measured at port T), a cleanliness level of at least 19/17/14 according to ISO 4406 is necessary. Influence of case pressure on beginning of control n increase in case pressure affects the beginning of control when using the following control options: HP, H.T3: Increase D: Decrease With the following settings, an increase in case pressure will have no effect on the beginning of control: H.R and H., EP, H The factory setting of the beginning of control is made at p abs = 30 psi (2 bar) case pressure. Flow direction Direction of rotation, viewed on drive shaft clockwise (cw) counter-clockwise (ccw) to to Shaft seal Permissible pressure loading The service life of the shaft seal will be influenced by the speed of the axial piston unit and the leakage pressure in the housing (case pressure). Momentary pressure spikes (t < 0.1 s) of up to 145 psi (10 bar) are permitted. The service life of the shaft seal decreases with increasing frequency of pressure spikes and increasing mean differential pressure. The case pressure must be equal to or higher than the ambient pressure. Differential pressure Δp [psi (bar)] 75 (5) 60 (4) 45 (3) 30 (2) 15 (1) 0 Rotational speed n [rpm] N85 N60 N115, 150 N170, 215 N60 N85 N215 N150 N115 N170 The FKM shaft seal may be used for leakage temperatures from -13 F to +240 F (-25 C to +115 C). For application cases below -13 F (-25 C), an NR shaft seal is required (permissible temperature range: -40 F to +195 F (-40 C to +90 C)). osch Rexroth Corp., RE /

7 xial piston variable motor 6VM series 71 Operating pressure range 7 Operating pressure range Pressure at working port or Definition Nominal pressure p nom 6500 psi (450 bar) The nominal pressure corresponds to the maximum design pressure. Maximum pressure p max 7250 psi (500 bar) The maximum pressure corresponds to the maximum operating pressure Single operating period 10 s within the single operating period. The sum of the single operating Total operating period 300 h periods must not exceed the total operating period. Minimum pressure (high-pressure side) Minimum pressure pump operating mode (inlet) Summation pressure p Su (pressure + pressure ) 365 psi (25 bar) Minimum pressure at the high-pressure side ( or ) which is required in order to prevent damage to the axial piston unit. See the diagram below To prevent damage to the axial piston motor in pump operating mode (change of high-pressure side with unchanged direction of rotation, e. g. when braking), a minimum pressure must be guaranteed at working port (inlet). This minimum pressure is dependent on the speed and displacement of the axial piston unit (see characteristic curve) psi (700 bar) The summation pressure is the sum of the pressures at both working ports ( and ) Rate of pressure change R max With integrated pressure-relief valve Without pressure-relief valve psi/s (9000 bar/s) psi/s (16000 bar/s) Maximum permissible rate of pressure build-up and reduction during a pressure change over the entire pressure range. Rate of pressure change R max Pressure p p nom p t Time t Pressure definition Single operating period Maximum pressure p max Nominal pressure p nom t 1 t 2 t n Minimum pressure pump operating mode (inlet) Inlet pressure pabs [psi (bar)] 230 (16) 200 (14) 175 (12) 145 (10) 115 (8) 90 (6) V g max V g x 0.3 V g max 60 (4) 30 (2) 15 (1) Rotational speed n / n nom This diagram is valid only for the optimum viscosity range from ν opt = 170 to 73 SS (36 to 16 mm 2 /s). Please contact us if these conditions cannot be satisfied. Pressure p Note Operating pressure range valid when using hydraulic fluids based on mineral oils. Values for other hydraulic fluids, please contact us. Minimum pressure (high-pressure side) Time t Total operating period = t 1 + t t n RE / , osch Rexroth Corp.

8 8 6VM series 71 xial piston variable motor Technical data Technical data Size N Displacement geometric, V g max in per revolution cm V g min in cm V g x in cm Maximum speed 1) at V g max n nom rpm (complying with the maximum at V g < V g x (see diagram) n max rpm permissible inlet flow) at V g 0 n max rpm Inlet flow 2) at n nom and V g max q v max gpm l/min Torque 3) at V g max and T lb-ft Δp = 6500 psi (450 bar) Nm Rotary stiffness V g max to V g /2 c min lb-ft/rad knm/rad V g /2 to 0 c min lb-ft/rad (interpolated) knm/rad Moment of inertia for rotary group J TW lb-ft kgm Maximum angular acceleration α rad/s² Case volume V gal l Weight, approx. m lbs kg Permissible displacement in relation to speed Displacement Vg / Vg max V g x V g x N170 N85, 115, 150 N60, Rotational speed n / n nom Notes Theoretical values, without efficiency levels and tolerances; values rounded Operation above the maximum values or below the minimum values may result in a loss of function, a reduced service life or in the destruction of the axial piston unit. Other permissible limit values, such as speed variation, reduced angular acceleration as a function of the frequency and the permissible angular acceleration at start (lower than the maximum angular acceleration) can be found in data sheet ) Determining the operating characteristics V g n Inlet flow q v = [gpm] ( V g n 231 η ) [l/min] v 1000 η v Rotational speed n = q v 231 η v [rpm] ( q v 1000 η v V ) [rpm] g V g Torque T = V g Δp η mh [lb-ft] ( V g Δp η mh ) [Nm] 24 π 20 π Power P = 2 π T n q v Δp η t = [HP]( 2 π T n q v Δp η = t) [kw] Key V g = Displacement per revolution [in 3 (cm 3) ] Δp = Differential pressure [psi (bar)] n = Rotational speed [rpm] η v = Volumetric efficiency η mh = Mechanical-hydraulic efficiency η t = Total efficiency (η t = η v η mh ) 1) The values are valid: For the optimum viscosity range from ν opt = 170 to 75 SS (36 to 16 mm 2 /s) with hydraulic fluid on the basis of mineral oil 2) Note inlet flow limitation due to counterbalance valve (see page 65). 3) Torque without radial force, With radial force see page 9. 4) Values in this range on request osch Rexroth Corp., RE /

9 xial piston variable motor 6VM series 71 Technical data 9 Permissible radial and axial forces of the drive shafts Size N Drive shaft in 1 1/4 1 1/2 1 3/4 1 3/ Maximum radial force 1) at distance a (from shaft collar) F q F q max lb N a a in mm Torque maximum at F q max T max lb-ft Nm Differential pressure maximum Δp max psi at V g max and F q max bar Maximum axial force, + + F ax max lb at standstill or F ax N pressure-free operation F ax max lb N Permissible axial force per psi (bar) + F ax perm/bar lb/psi operating pressure N/bar Effect of radial force F q on the service life of bearings y selecting a suitable direction of radial force F q, the load on the bearings, caused by the internal rotary group forces can be reduced, thus optimizing the service life of the bearings. Recommended position of mating gear is dependent on direction of rotation. Examples: Notes The values given are maximum values and do not apply to continuous operation. The permissible axial force in F ax direction is to be avoided, because thereby the bearing life is reduced. Special requirements apply in the case of belt drives. Please contact us. Toothed gear output drive φ opt = 45 φ opt = Direction of rotation "counter-clockwise", pressure at port 2 Direction of rotation "clockwise", pressure at port 3 idirectional direction of rotation 1) With intermittent operation RE / , osch Rexroth Corp.

10 10 6VM series 71 xial piston variable motor HP Proportional hydraulic control HP Proportional hydraulic control The proportional hydraulic control provides infinite adjustment of the displacement. The control is proportional to the pilot pressure applied to port. HP1, HP2 positive control eginning of control at V g min (minimum torque, maximum permissible speed at minimum pilot pressure) End of control at V g max (maximum torque, minimum speed at maximum pilot pressure) HP5, HP6 negative control eginning of control at V g max (maximum torque, minimum speed at minimum pilot pressure) End of control at V g min (minimum torque, maximum permissible speed at maximum pilot pressure) Note Maximum permissible pilot pressure: p St = 1450 psi (100 bar) The control oil is internally taken from the high pressure side of the motor ( or ). For reliable control, an operating pressure of at least 435 psi (30 bar) is required in (). If a control operation is performed at an operating pressure < 435 psi (30 bar), an auxiliary pressure of at least 435 psi (30 bar) must be applied at port via an external check valve. For lower pressures, please contact us. Please note that pressures up to 7250 psi (500 bar) can occur at port. Please state the desired beginning of control in plain text when ordering, e. g.: beginning of control at 145 psi (10 bar). The beginning of control and the HP characteristic curve are influenced by the case pressure. n increase in case pressure causes an increase in the beginning of control (see page 6) and thus a parallel displacement of the characteristic. leakage flow of maximum 0.08 gpm (0.3 l/min) can escape at port due to internal leakage (operating pressure > pilot pressure). The control is to be suitably configured to avoid an independent build-up of pilot pressure. Response time damping The response time damping is influencing the stroke characteristics of the motor and thus the reaction speed of the machine. Standard with Size 60 to 215 HP without damping. HP.D with throttle pin on both sides, symmetrical (as to table) Option with Size 60 to 215 HP with throttle pin on both sides, symmetrical (as to table) Overview Throttle Pins Size roove [inch] size [mm] HP1, HP5 pilot pressure increase Δp St = 145 psi (10 bar) HP1 positive control pilot pressure increase of 145 psi (10 bar) at port results in an increase in displacement from V g min to V g max. HP5 negative control pilot pressure increase of 145 psi (10 bar) at port results in a decrease in displacement from V g max to V g min. eginning of control, setting range 30 to 290 psi (2 to 20 bar) Standard setting: eginning of control at 45 psi (3 bar) (end of control at 190 psi (13 bar)) Characteristic curve HP5 HP1 Pilot pressure increase eginning of control setting range 510 (35) 435 (30) 365 (25) 290 (20) 220 (15) 175 (12) 145 (10) 75 (5) 30 (2) Pilot pressure pst [psi (bar)] V g min V g / V g max V g max Displacement osch Rexroth Corp., RE /

11 xial piston variable motor 6VM series 71 HP Proportional hydraulic control 11 HP2, HP6 pilot pressure increase Δp St = 365 psi (25 bar) HP2 positive control pilot pressure increase of 365 psi (25 bar) at port results in an increase in displacement from V g min to V g max. HP6 negative control pilot pressure increase of 365 psi (25 bar) at port results in a decrease in displacement from V g max to V g min. eginning of control, setting range 75 to 725 psi (5 to 50 bar) Standard setting: eginning of control at 145 psi (10 bar) (end of control at 510 psi (35 bar)) Characteristic curve Circuit diagram HP5, HP6 (negative control) V g min V g max HP6 HP (70) Pilot pressure increase eginning of control setting range 870 (60) 725 (50) 580 (40) 510 (35) 435 (30) 290 (20) 145 (10) 75 (5) Pilot pressure pst [psi (bar)] T V g min V g / V g max V g max Displacement Circuit diagram HP1, HP2 (positive control) V g min V g max T 2 RE / , osch Rexroth Corp.

12 12 6VM series 71 xial piston variable motor HP Proportional hydraulic control HP5D1, HP6D1 Pressure control, fixed setting The pressure control overrides the HP control function. If the load torque or a reduction in motor swivel angle causes the system pressure to reach the setpoint value of the pressure control, the motor will swivel towards a larger displacement. The increase in the displacement and the resulting reduction in pressure cause the control deviation to decrease. With the increase in displacement the motor develops more torque, while the pressure remains constant. Setting range of the pressure control valve 1150 to 6500 psi (80 to 450 bar) Circuit diagram HP5D1, HP6D1 (negative control) V g min V g max T 2 osch Rexroth Corp., RE /

13 xial piston variable motor 6VM series 71 EP Proportional electric control 13 EP Proportional electric control The proportional electric control provides infinite setting of the displacement. Control is proportional to the electric control current applied to the solenoid. EP1, EP2 positive control eginning of control at V g min (minimum torque, maximum permissible speed at minimum control current) End of control at V g max (maximum torque, minimum speed at maximum control current) EP5, EP6 negative control eginning of control at V g max (maximum torque, minimum speed at minimum control current) End of control at V g min (minimum torque, maximum permissible speed at maximum control current) Characteristic curve EP5, EP6 EP1, EP V g min V g / V g max V g max 1600 max EP5 EP1 (12 V) max EP6 EP2 (24 V) Response time damping The response time damping is influencing the stroke characteristics of the motor and thus the reaction speed of the machine. Standard with Size 60 to 215 EP without damping. EP.D with throttle pin on both sides, symmetrical (as to table) Option with Size 60 to 115 EP with throttle pin on both sides, symmetrical (as to table) Overview Throttle Pins Size roove [inch] size [mm] Technical data, solenoid EP1, EP5 EP2, EP6 Voltage 12 V (±20 %) 24 V (±20 %) Control current eginning of control 400 m 200 m End of control 1200 m 600 m Current limit Nominal resistance (at 68 F (20 C)) 5.5 Ω 22.7 Ω Dither frequency 100 Hz 100 Hz Duty cycle 100 % 100 % Type of protection: see connector version on page 62 Various ODS controllers with application software and amplifiers are available for controlling the proportional solenoids. Further information can also be found on the internet at Note The control oil is internally taken out of the high pressure side of the motor ( or ). For reliable control, an operating pressure of at least 435 psi (30 bar) is necessary in (). If a control operation is performed at an operating pressure < 435 psi (30 bar), an auxiliary pressure of at least 435 psi (30 bar) must be applied at port using an external check valve. For lower pressures, please contact us. Please note that pressures up to 7250 psi (500 bar) can occur at port. RE / , osch Rexroth Corp.

14 14 6VM series 71 xial piston variable motor EP Proportional electric control Circuit diagram EP1, EP2 (positive control) V g min V g max EP5D1, EP6D1 Pressure control, fixed setting The pressure control overrides the EP control function. If the load torque or a reduction in motor swivel angle causes the system pressure to reach the setpoint value of the pressure control, the motor will swivel towards a larger displacement. The increase in the displacement and the resulting reduction in pressure cause the control deviation to decrease. With the increase in displacement the motor develops more torque, while the pressure remains constant. Setting range of the pressure control valve 1150 to 6500 psi (80 to 450 bar) T 2 Circuit diagram EP5D1, EP6D1 (negative control) Circuit diagram EP5, EP6 (negative control) V g min V g max T2 V g min V g max T 2 osch Rexroth Corp., RE /

15 xial piston variable motor 6VM series 71 HZ Two-point hydraulic control 15 HZ Two-point hydraulic control The two-point hydraulic control allows the displacement to be set to either V g min or V g max by switching the pilot pressure at port on or off. HZ5, HZ7 negative control Position at V g max (without pilot pressure, maximum torque, minimum speed) Position at V g min (with pilot pressure > 145 psi (10 bar) activated, minimum torque, maximum permissible speed) Characteristic curve HZ5, HZ7 V g min Displacement 1450 (100) 145 (10) 0 V g max Pilot pressure ΔpS [psi (bar)] Response time damping The response time damping is influencing the stroke characteristics of the motor and thus the reaction speed of the machine. Standard with Size 150 to 215 HZ5 with throttle pin on both sides, symmetrical (as to table) Standard with Size 60 to 115 HZ7 (Synchronizing piston) with throttle pin on both sides, symmetrical (as to table) Overview Throttle Pins Size roove [inch] size [mm] Circuit diagram HZ5 (negative control) size 150 to 215 Note Maximum permissible pilot pressure: 1450 psi (100 bar) The control oil is internally taken out of the high pressure side of the motor ( or ). For reliable control, an operating pressure of at least 435 psi (30 bar) is required in (). If a control operation is performed at an operating pressure < 435 psi (30 bar), an auxiliary pressure of at least 435 psi (30 bar) must be applied at port via an external check valve. For lower pressures, please contact us. Please note that pressures up to 7250 psi (500 bar) can occur at port. T 2 V g min V g max Circuit diagram HZ7 (negative control) size 60 to 115 V g min V g max T 2 RE / , osch Rexroth Corp.

16 16 6VM series 71 xial piston variable motor EZ Two-point electric control EZ Two-point electric control The two-point electric control allows the displacement to be set to either V g min or V g max by switching the electric current to a switching solenoid on or off. Circuit diagram EZ5, EZ6 (negative control) size 150 to 215 Note The control oil is internally taken out of the high pressure side of the motor ( or ). For reliable control, an operating pressure of at least 435 psi (30 bar) is required in (). If a control operation is performed at an operating pressure < 435 psi (30 bar), an auxiliary pressure of at least 435 psi (30 bar) must be applied at port via an external check valve. For lower pressures, please contact us. Please note that pressures up to 7250 psi (500 bar) can occur at port. V g min V g max Response time damping The response time damping is influencing the stroke characteristics of the motor and thus the reaction speed of the machine. Standard with Size 150 to 215 EZ5, EZ6 with throttle pin on both sides, symmetrical (as to table) Option with Size 60 to 115 EZ7, EZ8 (Synchronizing piston) with throttle pin on both sides, symmetrical (as to table) Overview Throttle Pins Size roove [inch] size [mm] Sizes 150 to 215 Technical data, solenoid with DI37 EZ5 EZ6 Voltage 12 V (±20 %) 24 V (±20 %) Position V g max de-energized de-energized Position V g min energized energized Nominal resistance (at 68 F (20 C)) 5.5 Ω 21.7 Ω Nominal power 26.2 W 26.5 W Minimum required active current Duty cycle 100 % 100 % Type of protection: see connector version on page 62 T 2 Sizes 60 to 115 Technical data, solenoid with DI45 EZ7 EZ8 Voltage 12 V (±20 %) 24 V (±20 %) Position V g max de-energized de-energized Position V g min energized energized Nominal resistance (at 68 F (20 C)) 4.8 Ω 19.2 Ω Nominal power 30 W 30 W Minimum required active current Duty cycle 100 % 100 % Type of protection: see connector version on page 62 Circuit diagram EZ7, EZ8 (negative control) size 60 to 115 V g min V g max T 2 osch Rexroth Corp., RE /

17 xial piston variable motor 6VM series 71 H utomatic high-pressure related control 17 H utomatic high-pressure related control The automatic high-pressure related control adjusts the displacement automatically depending on the operating pressure. The displacement of the 6VM motor with H control is V g min (maximum speed and minimum torque). The control unit internally measures the operating pressure at or (no control line required) and upon reaching the set beginning of control, the controller swivels the motor from V g min to V g max with increase of operating pressure. The displacement is modulated between V g min and V g max, thereby depending on load conditions. H1, H2 positive control eginning of control at V g min (minimum torque, maximum speed) End of control at V g max (maximum torque, minimum speed) Response time damping The response time damping is influencing the stroke characteristics of the motor and thus the reaction speed of the machine. Standard with Size 60 to 215 H1,2 with one-sided throttle pin, the throttling occurs from V g min to V g max. (as to table) Overview Throttle Pins Size roove [inch] size [mm] Standard with Size 60 to 215 H1, 2 with one sided throttle pin effects the stroking time of the motor from Vg min to Vg max. (as to table) Note For safety reasons, winch drives are not permissible with beginning of control at V g min (standard for H). The control oil is internally taken out of the high pressure side of the motor ( or ). For reliable control, an operating pressure of at least 435 psi (30 bar) is required in (). If a control operation is performed at an operating pressure < 435 psi (30 bar), an auxiliary pressure of at least 435 psi (30 bar) must be applied at port via an external check valve. For lower pressures, please contact us. Please note that pressures up to 7250 psi (500 bar) can occur at port. The beginning of control and the H.T3 characteristic curve are influenced by case pressure. n increase in case pressure causes an increase in the beginning of control (see page 6) and thus a parallel shift of the characteristic. Overview Throttle Screw Size roove [inch] size [mm] RE / , osch Rexroth Corp.

18 18 6VM series 71 xial piston variable motor H utomatic high-pressure related control H1 with minimum pressure increase, positive control n operating pressure increase of Δp approx. 145 psi (10 bar) results in an increase in displacement from V g min towards V g max. eginning of control, setting range 1150 to 5100 psi (80 to 350 bar) Please state the desired beginning of control in plain text when ordering, e. g.: beginning of control at 4350 psi (300 bar). H2 with pressure increase, positive control n operating pressure increase of Δp approx psi (100 bar) results in an increase in displacement from V g min to V g max. eginning of control, setting range 1150 to 5100 psi (80 to 350 bar) Please state the desired beginning of control in plain text when ordering, e. g.: beginning of control at 2900 psi (200 bar) Characteristic curve H1 Operating pressure p [psi (bar)] 5800 (400) 5100 (350) 4350 (300) 3600 (250) 2900 (200) 2200 (150) 1450 (100) 1150 (80) 725 (50) 0 eginning of control setting range Circuit diagram H V g min V g / V g max V g max Displacement Pressure increase Δp approx. 145 psi (10 bar) Characteristic curve H2 Operating pressure p [psi (bar)] 6500 (450) 5800 (400) 5100 (350) 4350 (300) 3600 (250) 2900 (200) 2200 (150) 1450 (100) 1150 (80) 725 (50) 0 eginning of control setting range Circuit diagram H V g min V g / V g max V g max Displacement Pressure increase Δp approx psi (100 bar) V g min V g max V g min V g max T 2 T 2 osch Rexroth Corp., RE /

19 xial piston variable motor 6VM series 71 H utomatic high-pressure related control 19 H.T3 hydraulic override, remote control, proportional With the H.T3 control, the beginning of control can be influenced by applying a pilot pressure to port. For each 15 psi (1 bar) of pilot pressure increase, the beginning of control is reduced by 250 psi (17 bar). eginning of control setting 4350 psi (300 bar) 4350 psi (300 bar) Pilot pressure at port 0 psi 145 psi 0 bar (10 bar) eginning of control at 4350 psi 1900 psi (300 bar) (130 bar) Circuit diagram H2.T3 V g min V g max Note Maximum permissible pilot pressure 1450 psi (100 bar). T 2 Circuit diagram H1.T3 V g min V g max T 2 RE / , osch Rexroth Corp.

20 20 6VM series 71 xial piston variable motor H utomatic high-pressure related control H.1, H.2 electric override, two-point Circuit diagram H21, H22 With the H.1 or H.2 control, the beginning of control can be overridden by an electric signal to a switching solenoid. When the override solenoid is energized, the variable motor swivels to maximum swivel angle, without intermediate position. The beginning of control can be set between 1150 and 4350 psi (80 and 300 bar) (specify required setting in plain text when ordering). V g min V g max Technical data, solenoid with DI Voltage 12 V (±20 %) 24 V (±20 %) No override de-energized de-energized Position V g max energized energized Nominal resistance (at 68 F (20 C)) 4.8 Ω 19.2 Ω T 2 Nominal power 30 W 30 W Minimum required active current Duty cycle 100 % 100 % Type of protection: see connector version on page 62 Circuit diagram H11, H12 V g min V g max T 2 osch Rexroth Corp., RE /

21 xial piston variable motor 6VM series 71 H utomatic high-pressure related control 21 H.R1, H.R2 electric override, electric travel direction valve With the H.R1 or H.R2 control, the beginning of control can be overridden by an electric signal to switching solenoid b. When the override solenoid is energized, the variable motor swivels to maximum swivel angle, without intermediate position. The travel direction valve ensures that the preselected pressure side of the hydraulic motor ( or ) is always connected to the H control, and thus determines the swivel angle, even if the high-pressure side changes (e. g. -travel drive during a downhill operation). This thereby prevents undesired jerky deceleration and/or braking characteristics. The travel direction valve (see page 24) is either pressure spring or switched by energizing switching solenoid a, depending on the direction of rotation (travel direction). Circuit diagram H1R1, H1R2 T 2 V g min V g max b a Electric override Technical data, solenoid b with DI45 R1 R2 Voltage 12 V (±20 %) 24 V (±20 %) No override de-energized de-energized Circuit diagram H2R1, H2R2 Position V g max energized energized Nominal resistance (at 68 F (20 C)) 4.8 Ω 19.2 Ω Nominal power 30 W 30 W Minimum required active current Duty cycle 100 % 100 % Type of protection: see connector version on page 62 V g min Travel direction valve, electric V g max Technical data, solenoid a with DI37 R1 R2 Voltage 12 V (±20 %) 24 V (±20 %) Direction of rotation Operating pressure in ccw energized energized T 2 cw de-energized de-energized Nominal resistance (at 68 F (20 C)) 5.5 Ω 21.7 Ω Nominal power 26.2 W 26.5 W b a Minimum required active current Duty cycle 100 % 100 % Type of protection: see connector version on page 62 RE / , osch Rexroth Corp.

22 22 6VM series 71 xial piston variable motor D utomatic speed-related control D utomatic speed-related control The variable motor 6VM with automatic speed-related control, type D, is intended for use in hydrostatic travel drives in combination with the variable pump 4V with D control. drive-speed-related pilot pressure signal is generated by the 4V variable pump, and that signal, together with the operating pressure, regulates the swivel angle of the hydraulic motor. Increasing pump speed, i.e. increasing pilot pressure, causes the motor to swivel to a smaller displacement (lower torque, higher speed), depending on the operating pressure. If the operating pressure exceeds the pressure setpoint set on the controller, the variable motor swivels to a larger displacement (higher torque, lower speed). Pressure ratio p St /p HD = 5/100 D0 hydraulic travel direction valve, negative control Depending on the direction of rotation (travel direction), the travel direction valve is switched by using pilot pressures connections 1 or 2. Direction of rotation Operating pressure in cw 1 ccw 2 Circuit diagram D0 3 Pilot pressure in 1 2 D closed loop control is only suitable for certain types of drive systems and requires review of the engine and vehicle parameters to ensure that the motor is used correctly and that machine operation is safe and efficient. We recommend that all D applications be reviewed by a osch Rexroth application engineer. Detailed information is available from our sales organization. V g min V g max Note The beginning of control and the D characteristic curve are influenced by case pressure. n increase in case pressure causes a decrease in the beginning of control (see page 6) and thus a parallel shift of the characteristic. T 2 Response time damping The response time damping is influencing the stroke characteristics of the motor and thus the reaction speed of the machine. Standard with Size 60 to 215 D with one sided throttle pin effects the stroking time of the motor from V g min to V g max. (as to table) Overview Throttle Pins Size roove size [inch] [mm] osch Rexroth Corp., RE /

23 xial piston variable motor 6VM series 71 D utomatic speed-related control 23 D1, D2 electric travel direction valve + electric Circuit diagram D1, D2 V g max circuit, negative control The travel direction valve is pressure spring offset or switched by energizing switching solenoid a, depending on a 3 the direction of rotation (travel direction). When the switching solenoid b is energized, the D control 1 is overridden and the motor swivels to maximum displacement (high torque, lower speed) (electric V g max -circuit). b Travel direction valve, electric Technical data, solenoid a with DI37 D1 D2 Voltage 12 V (±20 %) 24 V (±20 %) Direction of rotation Operating pressure in V g min V g max ccw de-energized de-energized cw energized energized Nominal resistance (at 68 F (20 C)) 5.5 Ω 21.7 Ω Nominal power 26.2 W 26.5 W T 2 Minimum required active current Duty cycle 100 % 100 % Type of protection: see connector version on page 62 Electric override Technical data, solenoid b with DI37 D1 D2 Voltage 12 V (±20 %) 24 V (±20 %) No override de-energized de-energized Position V g max energized energized Nominal resistance (at 68 F (20 C)) 5.5 Ω 21.7 Ω Nominal power 26.2 W 26.5 W Minimum required active current Duty cycle 100 % 100 % Type of protection: see connector version on page 62 RE / , osch Rexroth Corp.

24 24 6VM series 71 xial piston variable motor Electric travel direction valve (for D, H.R) Electric travel direction valve (for D, H.R) pplication in travel drives in closed circuits. The travel direction valve of the motor is actuated by an electric signal that also switches the swivel direction of the travel drive pump (e. g. 4V with D control valve). If the pump in the closed circuit is switched to the neutral position or into reverse, the vehicle may experience jerky deceleration or braking, depending on the vehicle's mass and current travel speed. When the travel direction valve of the pump (e. g. 4/3-directional valve of the D-control) is switched to the neutral position, the electric circuitry causes the previous signal on the travel direction valve on the motor to be retained. Reversing, the travel direction valve causes the travel direction valve of the motor to switch to the other travel direction following a time delay (approx. 0.8 s) with respect to the pump. s a result, jerky deceleration or braking is prevented in both cases. Control D1, D b a H1R., H2R. control b a Circuit diagram - electric travel direction valve Travel direction valve K2 Solenoid a Pump a 24 V DC V N R Solenoid b Pump b K1.1 V1 Switching solenoid a on the travel direction valve K2.1 K K V DC Solenoid a Motor The diodes and relays shown are not included in the scope of delivery of the motor. osch Rexroth Corp., RE /

25 Dimensions [inch (mm)] xial piston variable motor 6VM series 71 Dimensions size Dimensions size 60 EP5, EP6 Proportional electric control, negative control Port plate 2 SE working ports and at side, opposite 8.15 (207) 5.20 (132) 2.85 (72.5) 3.31 (84) 0.50 (12.7) (20) T (8) 1) Y 0.94 (24) 1.18 (30) 2) 6.93 (176) 6.06 (154) Z 0.56 (14.3) 4.51 (114.5) 5.75 (146) 3.58 (91) 5.16 (131) 1) 4.51 (114.5) 9.29 (236) 2) 0.91 (23) 5.75 (146) (267) View Y DI5.000 DI4.998 (DI ) 2.00 (50.8) 0.94 (23.8) 0.75 (19) Flange SEJ744 Center of gravity 1) Port plate 1 SE working ports and at rear RE / , osch Rexroth Corp.

26 26 6VM series 71 xial piston variable motor Dimensions size 60 Dimensions [inch (mm)] Location of working ports on port plates (view Z) 2 SE working port and at side, opposite 1 SE working port and at rear 2 SE working port and at side, opposite only HZ7, EZ7/8 1 SE working port and at rear only HZ7, EZ7/ (37.5) (37.5) (152) 6.50 (165) (54) (54) 5.98 (152) 6.50 (165) Splined shaft SE J744 S7 1 1/4 in 142/24DP 1) 1.89 (48) DI4.37 (DI111) 7/16-14NC-2 2) 0.37 (9.5) 1.10 (28) DI1.77 (DI45) 1.57 (40) 2.20 (56) 1) Involute toothing acc. to NSI 92.1a, 30 pressure angle, flat root, side fit, tolerance class 5 2) Thread according to SME 1.1 osch Rexroth Corp., RE /

27 Dimensions [inch (mm)] xial piston variable motor 6VM series 71 Dimensions size Ports Standard Size p max [psi (bar)] 1) Status 6), 4) Working port Mounting bolt /, screw grade 8 with hardened washer SE J518 2) SME 1.1 3/4 in 3/8 in - 16 NC-2; 0.83 (21) deep 7250 psi (500 bar) O Drain port ISO ) 1 1/16 in 12 N-2; 0.79 (20) deep 45 (3) 3) T 2 Drain port ISO ) 1 1/16 in -12 N-2; 0.79 (20) deep 45 (3) O 3) Synchronous control ISO ) 9/16 in -18 NF-2; 0.51 (13) deep 7250 psi (500 bar) earing flushing ISO ) 7/8 in -14 NF-2; 0.67 (17) deep 45 (3) Pilot signal (HP, HZ, H1T/H2T) ISO ) 9/16 in -18 NF-2; 0.51 (13) deep 1450 (100) O Pilot signal (H1, H2) ISO ) 9/16 in -18 NF-2; 0.51 (13) deep 45 (3) 1, 2 Pilot signal (D0) ISO SDSC-L8 M12-F 580 (40) O 1 Pilot signal (D1, D2) ISO ) 9/16 in -18 NF-2; 0.51 (13) deep 580 (40) O 3 Pilot signal (D1, D2) ISO ) 9/16 in -18 NF-2; 0.51 (13) deep 580 (40) Measuring stroking chamber ISO ) 9/16 in -18 NF-2; 0.51 (13) deep 7250 psi (500 bar) 1) Momentary pressure spikes may occur depending on the application. Keep this in mind when selecting measuring devices and fittings. 2) Only dimensions according to SE J518. 3) Depending on installation position, or T 2 must be connected (see also installation instructions on page 72). 4) For the maximum utilization of pressure, only grade 8 screws and hardened washers are to be used to tighten the SE flange shells. 5) The spot face can be deeper than as specified in the standard. 6) O = Must be connected (plugged on delivery) = Plugged (in normal operation) RE / , osch Rexroth Corp.

28 28 6VM series 71 xial piston variable motor Dimensions size 60 Dimensions [inch (mm)] EP1, EP2 Electric proportional control, positive control EP5D1, EP6D1 Electric proportional control, negative control, with pressure control, fixed setting (263) (267) M1 M (225) 4.21 (107) 6.06 (154) 6.93 (176) HP1, HP2 Hydraulic proportional control, positive control HP5, HP6 Hydraulic proportional control, negative control 1.40 (35.5) (263) 7.24 (184) (264) M (35.5) 9.21 (234) (139) 6.26 (159) 4.21 (107) 4.33 (110) 3.54 (90) 6.06 (154) HP5D1, HP6D1 Hydraulic proportional control, negative control, with pressure control, fixed setting (264) (35.5) 9.41 (239) 4.72 (120) 3.50 (89) 6.06 (154) osch Rexroth Corp., RE /

29 Dimensions [inch (mm)] xial piston variable motor 6VM series 71 Dimensions size HZ7 Hydraulic two-point control, negative control 9.88 (251) 8.15 (207) EZ7, EZ8 Electric two-point control, negative control 9.88 (251) 8.15 (207) 3.94 (100) 2.40 (61) 6.89 (175) 9.41 (239) 1) 0.94 (24) 1.22 (31) 1) 3.94 (100) 4.61 (117) 5.75 (146) 4.88 (124) 9.41 (239) 1) 0.94 (24) 1.22 (31) 1) 5.75 (146) H1, H2 / H1T3, H2T3 utomatic high-pressure-related control, positive control, with override hydraulic remote controlled, proportional H11, H22 utomatic high-pressure-related control, positive control, with override, electric, two-point (263) (263) 1.40 (35.5) 7.24 (184) 5.47 (139) 6.26 (159) 4.21 (107) 4.21 (107) 8.86 (225) H1 and H2, plugged H1T and H2T, open H1R1, H2R2 utomatic high-pressure-related control, positive control, with override, electric and travel direction valve, electric (263) a 8.86 (225) 4.21 (107) b 4.33 (110) 1) Port plate 1 SE working ports and at rear RE / , osch Rexroth Corp.

30 30 6VM series 71 xial piston variable motor Dimensions size 60 Dimensions [inch (mm)] D0 utomatic speed-related control, negative control, with hydraulic travel direction valve D1, D2 utomatic speed-related control, negative control, with electric travel direction valve and electric V g max switch 6.30 (160) (267) 7.95 (202) 1 ; (120) 3.70 (94) 6.06 (154) (110) (8.5) (267) 8.90 (226) b a (132) 6.06 (154) 6.10 (155) 1, 2 pipe fitting SDSC L8 M12 F according to ISO se assembled fitting! osch Rexroth Corp., RE /

31 Dimensions [inch (mm)] xial piston variable motor 6VM series 71 Dimensions size Dimensions size 85 EP5, EP6 Proportional electric control, negative control, with Mounting flange C2 Port plate 2 SE working ports and at side, opposite 9.13 (232) 5.55 (141) 3.15 (80) (11) 1.08 (27.5) 7.17 (182) Z 0.69 (17.5) 3.58 (91) 0.50 (12.7) 0.91 (23) T 2 Y 1.34 (34) 1) 6.57 (167) 3.94 (100) 5.67 (144) (263) 1) 7.13 (181) (295) 8.39 (213) View Y DI5.000 DI4.998 (DI ) 0.91 (23) 2.25 (57.2) 1.09 (27.8) 0.98 (25) Flange SEJ744 Center of gravity 1) Port plate 1 SE working ports and at rear RE / , osch Rexroth Corp.

32 32 6VM series 71 xial piston variable motor Dimensions size 85 Dimensions [inch (mm)] Dimensions size 85 EP5, EP6 Proportional electric control, negative control, with Mounting flange C4 Port plate 2 SE working ports and at side, opposite 9.13 (232) 3.15 (80) 3.58 (91) 5.55 (141) (12.7) 0.83 (21) T (100) T 0.33 (8.44) Y 1.08 (27.5) 1.34 (34) 1) 7.17 (182) 6.57 (167) Z 0.56 (14.3) 4.51 (114.5) 6.06 (154) 5.79 (147) (263) 1) (295) (0.12) 4.51 (114.5) 6.14 (156) View Y DI5.000 DI4.998 (DI ) 2.25 (57.2) 0.91 (23) 1.09 (27.8) 0.98 (25) Flange SEJ744 Center of gravity 1) Port plate 1 SE working ports and at rear osch Rexroth Corp., RE /