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Description
- Size 145
- Nominal pressure 320 bar
- Maximum pressure 420 bar
- Open circuit
Features
- Nominal pressure range up to 350 bar for reduced operation data possible.
- High permissible drive speed
- Favorable power-to-weight ratio – compact dimensions
- Low noise
- Excellent suction characteristics
- Controls with short response times
- Swashplate design
Type code
| 1) | Connectors for other electric components may differ |
| 2) | Also applies to versions without through drive |
| 1) | For information on combination pumps refer to the "Overview of mounting options" |
| 2) | Cannot be combined with the version "Double shaft seal" position 13. |
| 3) | Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 |
Notice
- Observe the information in the project planning notes chapter
- Observe the project planning notes regarding each control device
- In addition to the type code, please specify the relevant technical data when placing your order
Technical data
Table of values
| Size | 145 | |||
| Displacement | Vg | cm³ | 145 | |
| Nominal pressure | pnom | bar | 320 | |
| Maximum pressure | pmax | bar | 420 | |
| Maximum speed 1) | nnom | rpm | 2300 | |
| Flow | at nnom | qV | l/min | 333 |
| Power | at nnom and pnom | P | kW | 178 |
| Torque | at pnom | M | Nm | 738 |
| Rotary stiffness | R1, 1 3/4 in 13T 8/16DP | c | kNm/rad | 151.084 |
| W9, 1 1/2 in 17T 12/24DP | c | kNm/rad | 137.475 | |
| W8, 1 3/8 in 21T 16/32DP | c | kNm/rad | 141.257 | |
| Moment of inertia for rotary group | JTW | kg·m² | 0.016 | |
| Maximum angular acceleration 2) | ɑ | rad/s² | 2700 | |
| Case volume | V | l | 1.3 | |
| Weight with mounting flange C2/D4, without through drive | m | kg | 57 | |
| Weight with mounting flange C2/D4, with through drive | m | kg | 62 | |
| Weight with mounting flange G3, without through drive | m | kg | 72 | |
| Weight with mounting flange G3, with through drive | m | kg | 77 | |
| 1) | The values are applicable: – at an abs. pressure pabs = 1 bar at the suction port S – for the optimum viscosity range of vopt = 36 to 16 mm2/s ‒ with hydraulic fluid on the basis of mineral oil; higher rotational speeds available on request |
| 2) | The data are valid for values between the minimum required and maximum permissible rotational speed. It applies for external stimuli (e.g. diesel engine 2 to 8 times rotary frequency, cardan shaft twice the rotary frequency). The limit value is only valid for a single pump. The load capacity of the connection parts must be considered. |
| Determining the operating characteristics | ||
| Flow |  | [l/min] |
| Torque |  | [Nm] |
| Power |  | [kW] |
| Key | |
| Vg | Displacement per revolution [cm3] |
| Δp | Differential pressure [bar] |
| n | Rotational speed [rpm] |
| ηv | Volumetric efficiency |
| ηhm | Hydraulic-mechanical efficiency |
| ηt | Total efficiency (ηt = ηv • ηhm) |
Notice
- The table values are theoretical values without consideration of efficiencies and tolerances. The values are 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.
Bosch Rexroth recommends testing the loads by means of experiment or calculation / simulation and comparison with the permissible values.
Hydraulic fluid
The axial piston unit is designed for operation with HLP mineral oil according to DIN 51524. See the following data sheet for application instructions and requirements for selecting hydraulic fluid, behavior during operation as well as disposal and environmental protection before you begin project planning:
- 90220:Hydraulic fluids based on mineral oils and related hydrocarbons
Selection of hydraulic fluid
Bosch Rexroth evaluates hydraulic fluids on the basis of the Fluid Rating according to the technical data sheet 90235.
Hydraulic fluids with positive evaluation in the Fluid Rating are provided in the following technical data sheet:
- 90245: Bosch Rexroth Fluid Rating List for Rexroth hydraulic components (pumps and motors)
The hydraulic fluid should be selected so that the operating viscosity in the operating temperature range is within the optimum range (νopt; see selection diagram).
Viscosity and temperature of hydraulic fluids
|
| Viscosity | Shaft | Temperature1) | Comment |
| Cold start | νmax ≤ 1600 mm²/s | FKM | ϑSt ≥ -25 °C | t ≤ 3 min, without load (p ≤ 50 bar), n ≤ 1000 rpm, |
| Warm-up phase | ν = 400 … 1600 mm²/s |
| t ≤ 15 min, p ≤ 0.7 • pnom and n ≤ 0.5 • nnom | |
| Continuous operation | ν = 10 … 400 mm²/s2) | FKM | ϑ ≤ +110 °C | measured at port L |
| νopt = 16 … 36 mm²/s | range of optimum operating viscosity and efficiency | |||
| Short-term operation | νmin = 7 … 10 mm²/s | FKM | ϑ ≤ +110 °C | t ≤ 3 min, p ≤ 0.3 • pnom measured at port L |
| 1) | If the specified temperatures cannot be maintained due to extreme operating parameters, please contact us. |
| 2) | Equates e.g. with the VG 46 a temperature range of +5 °C to +85 °C (see selection diagram) |
Selection diagram
Notice
For applications in the low-temperature range down to -40°C, please contact us.
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.
A cleanliness level of at least 20/18/15 is to be maintained according to ISO 4406.
At a hydraulic fluid viscosity of less than 10 mm²/s (e.g. due to high temperatures in short-term operation) at the drain port, a cleanliness level of at least 19/17/14 according to ISO 4406 is required.
For example, the viscosity is 10 mm²/s at:
- HLP 32 a temperature of 73°C
- HLP 46 a temperature of 85°C
Operating pressure range
| Pressure at working port B | Definition | ||
| Nominal pressure | pnom | 320 bar | The nominal pressure corresponds to the maximum design pressure. |
| "Load Cycle (LC)" nominal pressure | pnom, LC | 350 bar | Permissible only up to 80 % swivel angle and 2000 rpm. |
| Maximum pressure | pmax | 420 bar | The maximum pressure corresponds to the maximum operating pressure within the single operating period. The sum of the single operating periods must not exceed the total operating period. |
| Single operating period | 0.05 s | ||
| Total operating period | 14 h | ||
| Minimum pressure | pB abs | 10 bar | Minimum pressure on the high-pressure side (port B) which is required in order to prevent damage to the axial piston unit. |
| Rate of pressure change | RA max | 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) | |||
| Minimum pressure | pS min | 0.8 bar absolute | Minimum pressure at inlet (suction port S) which is required to prevent damage to the axial piston unit. The minimum pressure depends on the rotational speed, pressure at port B and displacement of the axial piston unit. |
| Maximum pressure | pS max | 5 bar abs. | |
| Case pressure at port L1, L2 | |||
| Maximum pressure | pL max | 2 bar abs.1) | Maximum 0.5 bar higher than inlet pressure at port S, however not higher than pL max. |
| Pilot pressure port X with external high pressure | |||
| Maximum pressure | pmax | 420 bar | Minimum pressure at inlet (suction port S) which is required to prevent damage to the axial piston unit. The minimum pressure is permissible only up to 2000 rpm. |
| 1) | Higher housing pressures on request |
Rate of pressure change
Pressure definition
| 1) | Total operating period = t1 + t2 + ... + tn |
Notice
- Working pressure range applies when using mineral oil-based hydraulic fluids. Please contact us for values for other hydraulic fluids.
Permissible radial and axial loading of the drive shaft
Notice
- For drives with radial loading (pinion, V-belt drives), please contact us!
- For drives with axial loading drives, please contact us!
Permissible input and through-drive torques
| Size | 145 | |||
| Maximum input torque at the drive shaft | R1, 1 3/4 in 13T 8/16DP | ME max | Nm | 2000 |
| W9, 1 1/2 in 17T 12/24DP | ME max | Nm | 1320 | |
| W8, 1 3/8 in 21T 16/32DP | ME max | Nm | 1295 | |
| Maximum through-drive torque | R1, 1 3/4 in 13T 8/16DP | MD max | Nm | 770 |
| W9, 1 1/2 in 17T 12/24DP | MD max | Nm | 770 | |
| W8, 1 3/8 in 21T 16/32DP | MD max | Nm | 770 | |
Distribution of torques
| Torque at 1st pump | M1 |
| Torque at 2nd pump | M2 |
| Torque at 3rd pump | M3 |
| Input torque | ME = M1+M2+M3 |
| ME < ME max | |
| Through-drive torque | MD = M2+M3 |
| MD < MD max |
Controllers/adjustment devices
DR – Pressure controller
The pressure controller limits the maximum pressure at the pump outlet within the control range of the variable pump. The variable pump only supplies as much hydraulic fluid as is required by the consumers. If the working pressure exceeds the pressure command value at the pressure valve, the pump will regulate to a smaller displacement to reduce the control differential.
- Basic position in depressurized state: Vg max
Permissible setting range for pressure control
- DR: 80 to 320 bar.
Standard is 320 bar
- Setting to 350 bar for reduced operation data possible.
Notice
In order to prevent damage to the pump and the system, the permissible setting range must not be exceeded.
The range of possible settings at the valve is higher.
Controller data
Pressure increase Δp: maximum 14 bar
Hysteresis and repeatability Δp: maximum 8 bar
Characteristic curve DR
Characteristic curve valid for n1 = 1500 rpm and tfluid = 50 °C
Circuit diagram DR
DG – Pressure controller, remotely controlled
For the remote controlled pressure controller, the LS pressure limitation is performed using a separately arranged pressure relief valve.
Therefore, any pressure control value under the pressure set on the pressure controller can be regulated (see pressure controller DR.
A pressure relief valve is externally piped up to port X for remote control. This relief valve is not included in the scope of delivery of the DG control.
When there is differential pressure Δp at the control valve and with the standard setting on the remote controlled pressure cut-off of 20 bar, the amount of control fluid at the port is X approx. 1.5 l/min. If another setting is required (range from 10 to 22 bar) please state in plain text.
As a separate pressure relief valve (1) we recommend:
- a direct operated, hydraulic or electric proportional one, suitable for the control fluid mentioned above.
The maximum line length should not exceed 2 m.
- Basic position in depressurized state: Vg max
Permissible setting range for pressure control
- Setting range for pressure control 80 to 320 bar (3).
Standard is 320 bar.
- Setting range for differential pressure 10 to 22 bar (2)
Standard is 20 bar.
Unloading port X to the reservoir results in a zero stroke pressure (standby) which is approx. 1 to 2 bar higher than the defined differential pressure ∆p, however system influences are not taken into account.
Notice
In order to prevent damage to the pump and the system, the permissible setting range must not be exceeded.
The range of possible settings at the valve is higher.
Controller data
Pressure increase Δp: maximum 14 bar
Hysteresis and repeatability Δp: maximum 8 bar
Pilot fluid consumption: 4.5 l/min
Characteristic curve DG
Characteristic curve valid for n1 = 1500 rpm and tfluid = 50 °C
| 1) | Zero stroke pressure from pressure setting ∆p on controller (2) |
Circuit diagram DG
| 1 The separate pressure relief valve and the line are not included in the scope of delivery. | |
| 2 Remote controlled pressure cut-off (G) | |
| 3 Pressure controller (DR) |
DRS / DRC – Pressure flow controller
In addition to the pressure controller function (see pressure controller), an adjustable orifice (e.g. directional valve) is used to adjust the differential pressure upstream and downstream of the orifice. This is used to control the pump flow. The pump flow is equal to the actual hydraulic fluid quantity required by the consumer. With all controller combinations, the Vg reduction has priority.
- Basic position in depressurized state: Vg max
- Setting range up to 320 bar.
Notice
In order to prevent damage to the pump and the system, the permissible setting range must not be exceeded.
The range of possible settings at the valve is higher.
- For pressure controller data, see DR – Pressure controller
Differential pressure Δp:
- Standard setting: 14 bar
If another setting is required, please state in clear text.
- Setting range:14 to 22 bar
Unloading port X to the reservoir results in a zero stroke pressure (standby) which is approx. 1 to 2 bar higher than the defined differential pressure ∆p, however system influences are not taken into account.
Controller data
- For pressure controller DR data, see controller data DR.
- Maximum flow deviation measured at drive speed n = 1500 rpm.
Flow deviation Δqv max: maximum 8 l/min
Hysteresis and repeatability Δp: maximum 4 bar
Pilot fluid consumption: maximum 3 l/min
Characteristic curve DRS/DRC
Characteristic curve valid for n1 = 1500 rpm and tfluid = 50 °C
| 1) | Zero stroke pressure from pressure setting ∆p on controller (2) |
Characteristic curve at variable rotational speed
Circuit diagram DRS/DRC
| 1 The separate pressure relief valve and the line are not included in the scope of delivery. | |
| 2 Flow controller (S or C). | |
| 3 Pressure controller (DR) |
Connection options at port B
(not included in the scope of delivery)
| LS mobile control blocks | Data sheets |
| M4-12 | 64276 |
| M4-14 | 64283 |
| LUDV mobile control blocks | |
| M7-22 | 64295 |
Notice
The DRS and DRC versions have no unloading from X to the reservoir.
The LS must thus be unloaded in the system.
Because of the flushing function of the flow controller in the DRS control valve, sufficient unloading of the X line must also be ensured.
If this unloading of the X line cannot be ensured, the DRC control valve must be used.
EP – Electro-proportional control
Electro-proportional control makes a continuous and reproducible setting of the pump displacement possible directly via the cradle.
The control force of the control piston is applied by a proportional solenoid. The control is proportional to the current (for start of control, see table right).
In a depressurized state, the pump is swiveled to its initial position (Vg max) by an adjusting spring.
If the working pressure exceeds approx. 4 bar, the pump starts to swivel from Vg max to g min without control by the solenoid (control current < start of control). With a minimum swivel angle Vg min and de-energized EP solenoids, a minimum pressure of 10 bar must be maintained.
A PWM or Dither signal is used to control the solenoid.
A minimum working pressure of 30 bar is needed for safe and reproducible control. The required control fluid is taken from the high pressure.
EP.DR:
The pressure control regulates the pump displacement back to Vg min after the pressure command value has been reached.
Characteristic curve EP4
| Hysteresis static current-displacement characteristic curve <10 % |
Circuit diagram EP.DR
| Technical data, solenoids | EP4 | |
| Voltage | 12/24 V (±20 %) | |
| Control current | ||
| Start of control at Vg min | 600 mA | |
| End of control at Vg max | 1400 mA | |
| Dither frequency | ||
| Dither frequency | 100 HZ | |
| Dither amplitude peak to peak | 200-500 mA | |
| Current limit | 1500 mA | |
| Nominal resistance (at 20 °C) | 4.26 Ω | |
| Duty cycle | 100 % | |
| Type of protection: see connector version (see chapter Electrical connection) | ||
| Operating temperature range at valve (-20 °C to +115 °C) | ||
Electrical connection
Connector for solenoids
DEUTSCH DT04-2P
Molded, 2-pin, without bidirectional suppressor diode
The following type of protection ensues with the installed mating connector:
- IP67 (DIN/EN 60529) and
- IP69K (DIN 40050-9)
Mating connector DEUTSCH DT06-25-EP04
| Consisting of: | DT designation |
| 1 housing | DT06-25-EP04 |
| 1 wedge | W25 |
| 2 sockets | 0462-201-16141 |
| The mating connector is not included in the scope of delivery. This can be supplied by Bosch Rexroth on request (material number R902601804) |
Changing connector position
If necessary, you can change the position of the connector by turning the solenoid body.
To do this, proceed as follows:
- Loosen the mounting nut (1) of the solenoid. To do this, turn the mounting nut (1) one revolution to the left.
- Turn the solenoid body (2) to the desired position.
- Re-tighten the mounting nut. Tightening torque: 5+1 Nm. (Width across flats 26, 12-sided DIN 3124)
On delivery, the position of the connector may differ from that shown in the brochure or drawing.
Electronic controls
| Control | Electronics function | Electronics |
| Data sheet |
| Electric pressure control | Controlled power outlet | RA | analog | 95230 |
| RC4-5/30 | digital | 95205 |
Dimensions
Size 145
DRC – Pressure flow controller
Clockwise rotation
Mounting flange C2 (SAE-C; 127-2)1)
| 1) | Dimensions of working ports turned through 180° for counter-clockwise rotation |
Size 145
DRC – Pressure flow controller
Clockwise rotation
Mounting flange D4 (SAE-D; 152-4)1)
| 1) | Dimensions of working ports turned through 180° for counter-clockwise rotation |
Size 145
EP4DR – Electro-proportional control with pressure controller
Clockwise rotation
Mounting flange G3 (SAE J617)1)
| 1) | Dimensions of working ports turned through 180° for counter-clockwise rotation |
Splined shaft SAE J744
| 1) | Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 |
| 2) | Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 |
| 3) | For version with mounting flange G3. |
Splined shaft SAE J744
| 1) | Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 |
| 2) | Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 |
| 3) | For version with mounting flange G3. |
Ports and fastening threads port plate 02
| Size | 145 | ||
| B | Working port | Size | 1 1/4 in |
| Standard 1) | SAE J518 | ||
| Fastening thread 2) | M12 × 1.75; 21 mm deep | ||
| State on delivery | With protective cover (must be connected) | ||
| S | Suction port | Size | 3 in |
| Standard 1) | SAE J518 | ||
| Fastening thread 2) | M16 × 2; 24 mm deep | ||
| State on delivery | With protective cover (must be connected) | ||
| L1 | Drain port | Size | 1 1/16 in -12UN-2B; 20 mm deep |
| Standard 3) based on 3) | ISO 11926 | ||
| State on delivery | Depending on the installation position, L1 or L2 must be connected (also see installation instructions). | ||
| L2 | Drain port | Size | 1 1/16 in -12UN-2B; 20 mm deep |
| Standard 3) based on 3) | ISO 11926 | ||
| State on delivery 4) | Plugged (in normal operation) | ||
| X | Pilot signal | Size | 9/16 in -18UNF-2B; 13 mm deep |
| Standard based on | ISO 11926 | ||
| State on delivery | With protective cover (must be connected) | ||
| 1) | Metric fastening thread is a deviation from standard. |
| 2) | Thread according to DIN 13 |
| 3) | The spot face can be deeper than specified in the appropriate standard. |
| 4) | Depending on the installation position, L1 or L2 must be connected (also see installation instructions). |
Controller variants
All versions with:
Port plate 02; mounting flange D4; clockwise rotation
DR - Pressure controller
DRC – Pressure flow controller
EP4DR – Electro-proportional control with pressure controller
Dimensions for through drives BxSx
| Flange SAE J744 Diameter | Mounting2) | Designation | Hub for splined shaft1) Diameter | Designation |
| Code | |
| 101-2 (B) |  | B2 | 7/8 in | 13T 16/32DP | S4 |  | B2S4 |
| 1 in | 15T 16/32DP | S5 |  | B2S5 | |||
| 1 1/4 in | 14T 12/24DP | S7 |  | B2S7 | |||
 | B5 | 7/8 in | 13T 16/32DP | S4 |  | B5S4 | |
| 1 in | 15T 16/32DP | S5 |  | B5S5 | |||
| 1 1/4 in | 14T 12/24DP | S7 |  | B5S7 | |||
 | B7 | 7/8 in | 13T 16/32DP | S4 |  | B7S4 | |
| 1 in | 15T 16/32DP | S5 |  | B7S5 | |||
| 1 1/4 in | 14T 12/24DP | S7 |  | B7S7 | |||
| 1) | Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 |
| 2) | Mounting drillings pattern viewed on through drive, with service line port B on right |
2-bolt flange ⌀101.6mm, SAE J744 101-2 (B)
| 1) | 37 mm longer for version with mounting flange G3 |
| BxS4 | NG | M1 | M22) | M32) | M42) | M51) |
| (22-4 (B)) | 145 | 334.5 mm | 45.2 mm | 10 mm | 20.2 mm | M12; 20 mm deep |
| BxS5 | NG | M1 | M22) | M32) | M42) | M51) |
| (25-4 (B-B)) | 145 | 334.5 mm | 49.9 mm | 10 mm | 20.4 mm | M12; 20 mm deep |
| BxS7 | NG | M1 | M22) | M32) | M42) | M51) |
| (32-4 (C)) | 145 | 334.5 mm | 59.7 mm | 10 mm | 21.7 mm | M12; 20 mm deep |
| 1) | Thread according to DIN 13 |
| 2) | Minimum dimensions |
Dimensions for through drives CxSx; D4T1
| Flange SAE J744 Diameter | Mounting2) | Designation | Hub for splined shaft1) Diameter | Designation |
| Code | |
| 127-2 (C) |  | C2 | 1 1/4 in | 14T 12/24DP | S7 |  | C2S7 |
| 1 1/2 in | 17T 12/24DP | S9 |  | C2S9 | |||
 | C5 | 1 1/4 in | 14T 12/24DP | S7 |  | C5S7 | |
| 1 1/2 in | 17T 12/24DP | S9 |  | C5S9 | |||
 | C7 | 1 1/4 in | 14T 12/24DP | S7 |  | C7S7 | |
| 1 1/2 in | 17T 12/24DP | S9 |  | C7S9 | |||
| 152-4 (C) |  | D4 | 1 3/4 in | 13T 8/16DP | T1 |  | D4T1 |
| 1) | Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 |
| 2) | Mounting drillings pattern viewed on through drive, with service line port B on right |
2-hole flange ⌀127 mm, SAE J744 127-2 (C)
| 1) | 37 mm longer for version with mounting flange G3 |
| CxS7 | NG | M1 | M22) | M32) | M42) | M51) |
| (32-4 (C)) | 145 | 334.5 mm | 59.7 mm | 13 mm | 21.7 mm | M16; 22 mm deep |
| CxS9 | NG | M1 | M22) | M32) | M42) | M51) |
| (38-4 (C-C)) | 145 | 334.5 mm | 65.2 mm | 13 mm | 23.2 mm | M16; 22 mm deep |
| 1) | Thread according to DIN 13 |
| 2) | Minimum dimensions |
4-hole flange ⌀152.4 mm, SAE J744 152-4 (D)
| 1) | 37 mm longer for version with mounting flange G3 |
| D4T1 | NG | M1 | M22) | M32) | M42) | M51) |
| (44-4 (D&E)) | 145 | 343.8 mm | 76.7 mm | 13 mm | 22.7 mm | M22; through |
| 1) | Thread according to DIN 13 |
| 2) | Minimum dimensions |
Overview of mounting options
| Through drive | Mounting option - 2nd pump | ||||||
| Flange | Hub for splined shaft | Code | A10VOH/60 | A10VO/52/53 | A10V(S)O/3x | A1VO/10 | External gear pumps |
| 101-2 (B) | 7/8 in | B2S4 | - | 28 (S, R) | 28 (S, R) | 35 (S4) | AZPN |
| B5S4 | 45 (U, W) | 45 (U, W) | |||||
| B7S4 | |||||||
| 1 in | B2S5 | - | 45 (S, R) | 45 (S, R) | 35 (S5) | - | |
| B5S5 | 60, 63 (U, W) | ||||||
| B7S5 | 72 (U, W) | ||||||
| 1 1/4 in | B2S7 | - | 60, 63 (S, R) | - | - | - | |
| B5S7 | 72 (S, R) | ||||||
| B7S7 | |||||||
| 127-2 (C) | 1 1/4 in | C2S7 | - | 85 (U) | 71, 88 (S, R) | - | - |
| C5S7 | 100 (U) | 100 (U, W) | |||||
| C7S7 | |||||||
| 1 1/2 in | C2S9 | 145 (W9) | 85 (S) | 100 (S) | - | - | |
| C5S9 | 100 (S) | ||||||
| C7S9 | |||||||
| 152-4 (D) | 1 3/4 in | D4T1 | 145 (R1) | - | 140, 180 (S) | - | - |
Notice
A10VOH may only be planned as pump compensation without support with 100% through drive if the 1st pump is general provided with a 152-4 or 409-12 mounting flange (type code designation D4 or G3).
Combination pumps A10VOH + A10VOH
By using combination pumps, it is possible to have independent circuits without the need for splitter gearboxes.
When ordering combination pumps, the type designations of the 1st and 2nd pump must be connected with a "+" and are combined into one part number. Each single pump should be ordered according to type code.
Notice
- The combination pump type code is shown in shortened form in the order confirmation.
Example:
A10VOH 145 DRS00/60BR+A10VOH 145 DRS00/60BR
Each through drive is plugged with a non–pressure-resistant cover. This means the units must be sealed with a pressure-resistant cover before commissioning. Through drives can also be ordered with a pressure-resistant cover (U000).
Order example:
A10VOH145DRC0/60BRVD4R112D4R1+
A10VOH145DRC0/60BRVD4R112U000
A tandem pump with two pumps of equal size is permissible without additional supports, assuming that the dynamic mass acceleration does not exceed maximum 10 g (= 98.1 m/s2).
For combination pumps consisting of more than two pumps, the mounting flange must be rated for the permissible mass torque (please contact us).
| m1, m2 | Weight of pump | [kg] |
| l1 (l1a), l2 (l2a), | Distance from center of gravity | [mm] |
| Mass torque |
|
|
| Tm=(m1 + l1 (l1a), + m2 + l2 (l2a), + ....) x | 1 | [Nm] |
| 102 |
Weight with mounting flange C2, D4 and G3
| Mounting flange | Through drive |
| Nominal size |
|
| 145 | ||
| C2/D4 | without | mx= kg | 57 |
| with | mx= kg | 62 | |
| G3 | without | mx= kg | 72 |
| with | mx= kg | 77 | |
| Distance from center of gravity | |||
| Mounting flange | Through drive |
| |
| C2/D4 | without | l1= mm | 145.7 |
| with | l1= mm | 155.6 | |
| G3 | without | l1a= mm | 146 |
| with | l1a= mm | 163 | |
Project planning information
Installation instructions
General
The axial piston unit must be filled with hydraulic fluid and air bled during commissioning and operation. This must also be observed following a longer standstill as the axial piston unit may empty via the hydraulic lines.
Particularly in installation position "Drive shaft upwards/downwards", complete filling and air bleeding must be ensured as there is for example a risk of dry running.
The leakage in the housing area must be drained via the highest drain port (L1, L2, LX) to the reservoir.
In case of combinations of several units, draining of leakage is required at all pumps.
If one common drain line is used for several units, it must be ensured that the respective case pressure is not exceeded. The shared drain line must be dimensioned to ensure that the maximum permissible case pressure of all connected units is not exceeded in any operating conditions, particularly at cold start. If this is not possible, separate drain lines must be laid, if necessary.
To achieve favorable noise values, decouple all connecting lines using elastic elements and avoid above-reservoir installation.
In all operating conditions, the suction and drain lines must flow into the reservoir below the minimum fluid level. The permissible suction height hS is derived from the total pressure loss. However, hS max = 800 mm must not be exceeded. The minimum suction pressure at the port S must also not fall below 0.8 bar abs. during operation and during a cold start.
Make sure to provide adequate distance between suction line and drain line for the reservoir design. This prevents the heated return flow from being drawn directly back into the suction line.
Notice
- Port F is part of the external piping and must be provided on the customer side to make filling and air bleeding easier.
- In certain installation positions, an influence on the adjustment or control can be expected.
Gravity, dead weight and case pressure can cause minor characteristic shifts and changes in actuating time.
- The drain ports L1 and L2 are present by default. Depending on the installation position, another drain port is required. Please specify in plain text.
Installation position
See the following examples 1 to 6.
Further installation positions are available upon request.
Recommended installation positions: 1 and 2.
Below-reservoir installation (standard)
Below-reservoir installation is when the axial piston unit is installed outside of the reservoir below the minimum fluid level.
| Installation position | Air bleeding | Filling |
| 1 | F | F, L1 or L2 |
| 2 | F, L2 | F, L2 |
Above-reservoir installation
Above-reservoir installation means that the axial piston unit is installed above the minimum fluid level of the reservoir. Observe the maximum permissible suction height hS max = 800 mm
| Installation position | Air bleeding | Filling |
| 3 | F | L1 |
| 4 | F | L4 |
Inside-reservoir installation
Inside-reservoir installation is when the axial piston unit is installed in the reservoir below the minimum fluid level.
The axial piston unit is completely below the hydraulic fluid.
If the minimum fluid level is equal to or below the upper edge of the pump, see chapter "Above-reservoir installation".
Axial piston units with electrical components (e.g. electric control, sensors) may not be installed in a reservoir below the fluid level.
| Installation position | Air bleeding | Filling |
| 5 | Via the highest available port L1 | Automatically via the open port L1or L2due to the position under the hydraulic fluid level. |
| 6 | Via the highest available port L4 | Automatically via the open port L4, L1 or S due to the position under the hydraulic fluid level. |
| Key | |
| F | Filling / Air bleeding |
| L1, L2, L4 | Drain port |
| S | Suction port |
| SB | Baffle (baffle plate) |
| ht min | Minimum required immersion depth (200 mm) |
| hmin | Minimum required spacing to reservoir bottom (100 mm) |
| hS max | Maximum permissible suction height (800 mm) |
Project planning notes
- The axial piston unit is designed to be used in open circuits.
- The project planning, assembly and commissioning of the axial piston unit require the involvement of qualified skilled persons.
- Before using the axial piston unit, please read the corresponding instruction manual completely and thoroughly. If necessary, this can be requested from Bosch Rexroth.
- Before finalizing your design, please request a binding installation drawing.
- The specified data and notes contained herein must be observed.
- Depending on the operating conditions of the axial piston unit (working pressure, fluid temperature), the characteristic curve may shift.
- The characteristic curve may also shift due to the dither frequency or control electronics.
- Preservation: Our axial piston units are supplied as standard with preservative protection for a maximum of 12 months. If longer preservation is required (maximum 24 months), please specify this in plain text when placing your order. The preservation periods apply under optimal storage conditions, which can be found in data sheet 90312 or in the instruction manual.
- Not all versions of the product are approved for use in a safety function according to ISO 13849. Please consult the proper contact at Bosch Rexroth if you require reliability parameters (e.g. MTTFd) for functional safety.
- Depending on the type of control used, electromagnetic effects can be produced when using solenoids. Use of the recommended direct current (DC) on the electromagnet does not produce any electromagnetic interference (EMI) nor is the electromagnet influenced by EMI. Potential electromagnetic interference (EMI) exists if the solenoid is energized with a modulated direct current (e.g. PWM signal). The machine manufacturer should conduct appropriate tests and take appropriate measures to ensure that other components or operators (e.g. with a pacemaker) are not affected by this potentiality.
- Pressure controllers are no safeguards against pressure overload. Be sure to add a pressure relief valve to the hydraulic system.
- For drives that are operated for a long period with constant rotational speed, the natural frequency of the hydraulic system can be stimulated by the excitation frequency of the pump (rotational speed frequency ×9). This can be prevented with suitably designed hydraulic lines.
- Please note the details regarding the tightening torques of port threads and other threaded joints in the instruction manual.
- The ports and fastening threads are designed for the specified maximum pressure. The machine or system manufacturer must ensure the connecting elements and lines correspond to the specified application conditions (pressure, flow, hydraulic fluid, temperature) with the necessary safety factors.
- The working ports and function ports are only intended to accommodate hydraulic lines.
Safety Instructions
Safety instructions
- During and shortly after operation, there is a risk of burns on the axial piston unit and especially on the solenoids. Take the appropriate safety measures (e.g. by wearing protective clothing).
- Moving parts in control equipment (e.g. valve spools) can, under certain circumstances, get stuck in an undefined position as a result of contamination (e.g. contaminated hydraulic fluid, abrasion, or residual dirt from components). As a result, the hydraulic fluid flow and the build-up of torque in the axial piston unit can no longer respond correctly to the operator’s specifications. Even the use of various filter elements (external or internal flow filtration) will not rule out a fault but merely reduce the risk. The machine/system manufacturer must test whether remedial measures are needed on the machine for the application concerned in order to bring the driven consumer into a safe position (e.g. safe stop) and ensure any measures are properly implemented.
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