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{"title":"A4VSO71EO1\/30L-PPB13N00 A4VSO71LR2\/30L-PPB25N00 German piston bar axial","imgUrl":"https:\/\/img.chinax.com\/nimg\/35\/dd\/d32d0532f1879d4c55968ff91d80-200x200-1\/a4vso71eo1_2f30l_ppb13n00_a4vso71lr2_2f30l_ppb25n00_german_piston_bar_axial_excavator_motor_rexroth_brand_new_original_warranty_fo.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A4VSO71EO1\/30L-PPB13N00 A4VSO71LR2\/30L-PPB25N00","Certification":"ISO9001","Place of Origin":"German"}}
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R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth Piston Pump
Order Number
R902520809
Model
AA10VSO71DRS/32R-VPB22U00E-S2183
Type
Variable displacement axial piston pump (swashplate design, open circuit)
Nominal Displacement
71 cm³/rev
Control Type
DRS (Pressure & Flow Control / Load Sensing)
Pressure Rating
280 bar (Continuous) 350 bar (Peak, intermittent)
Speed Range
1000 - 1800 rpm (Recommended) Max. speed typically 2200 - 2400 rpm (limited by inlet conditions)
Rotation Direction
Right-hand (R) (viewed from shaft end)
Shaft Type
Splined shaft (SAE J744)
Port Connection
VPB22U (SAE flange with metric threads, with through-drive)
Mounting Flange
ISO 3019-2 (Series 32)
Seal Material
NBR (Standard for mineral oil)
Suitable Media
Mineral oils (HL, HLP), HLP-D, HVLP, HFC fluids
Media Temperature
-20 °C to +80°C (Start-up viscosity < 1000 mm²/s)
Recommended Viscosity
16 - 68 mm²/s (ISO VG 32-68)
Cleanliness Requirement
ISO 4406 20/18/15 or better
Weight
Approx. 47 - 52 kg
Frequently Asked Questions
What is DRS control, and how does it work?
DRS is a combined pressure-flow control with load sensing (LS).
Pressure Control: Limits system pressure to a set maximum (like a DR control)
Flow Control (LS): The pump automatically adjusts its swashplate angle to deliver only the flow required by the actuators, maintaining a constant pressure differential (Δp) across the control orifice. This results in significant energy savings compared to constant flow pumps
Can I mount an additional pump on the back?
Yes. The code VPB22U indicates this pump has a through-drive shaft (through-drive). You can mount a second pump (e.g., a gear pump for pilot flow or a second circuit) directly onto the back flange of this unit.
What are the critical installation precautions?
Case Drain (L port): Must be connected separately to tank with minimal backpressure (max 2-3 bar). Do not tee it into the main return line. This is critical for flushing heat and preventing seal/bearing failure
Suction Conditions: Ensure inlet pressure at port S is ≥ -0.8 bar (absolute) to avoid cavitation. Use short, large-diameter suction lines
Rotation: Confirm motor rotation matches the pump's "R" (clockwise) designation. Running backwards can destroy the pump
Why is my pump noisy or overheating?
Noise: Usually caused by cavitation. Check suction filter, inlet line for leaks, or oil viscosity being too high at startup
Overheating: Often due to excessive case pressure (blocked or undersized case drain line) or operating for long periods at high pressure with small displacement (high power loss)
How do I adjust the pressure setting?
The DRS control has a pressure limiter screw (usually under a cap on the control housing). Always adjust under controlled conditions with a pressure gauge:
Loosen the locknut
Turn the screw clockwise to increase pressure, counterclockwise to decrease
Tighten the locknut and re-check the setting
Is an external relief valve still needed?
Yes. While the DRS control limits pressure, it is not a safety valve. You must install a separate system relief valve (e.g., a DB/DBW type) in the main line as a safety backup against control failure.
What is the difference between DR and DRS?
DR: Only pressure control (constant pressure variable pump)
DRS: Pressure control + Load Sensing. DRS adds the ability to match flow to demand, which is more energy-efficient for systems with varying flow requirements
Disclaimer: For precise installation and commissioning, always refer to the official Rexroth technical data sheet RE 25700 for A10VSO Series 32 pumps.
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Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
