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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","Certifiion":"ISO9001","Place of Origin":"German"}}
{"title":"German Rexroth ISO9001 Certified Piston Pump for Mobile and Industrial Hydraulic","imgUrl":"https:\/\/img.chinax.com\/nimg\/73\/0e\/c4fe575b539956cb89a167a3ff3d-200x200-1\/german_rexroth_iso9001_certified_piston_pump_for_mobile_and_industrial_hydraulic_systems_with_clockwise_or_counterclockwise_rotati.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A2FO107\/61R-NBD55 A2FO107\/61R-PPB05 A2FO107\/61R-VPB05 A2FO107\/61R-VSD55 A2FO107\/61L-VSD55","Certifiion":"ISO","Place of Origin":"German"}}
DFR – Pressure & Flow Controller: maintains constant differential pressure across an external orifice (flow control by sensing Δp) and overlays a mechanically adjustable pressure limiting function
PPB13 – SAE flange side ports, pressure (B) & tank (S) ports 90° apart
Seal Material
FKM (Fluoroelastomer / Viton, standard for mineral oil HLP)
Case Drain
Two case drain ports – must be routed to tank < 2 bar backpressure
Recommended Oil Viscosity
16 - 100 mm²/s (optimal ISO VG 46 at operating temp)
Oil Cleanliness Requirement
ISO 4406 18/16/13 (NAS 1638 Class 8-9)
Net Weight (Approx.)
≈ 207 kg (dry, excl. coupling)
Package / Condition
Original factory wooden crate, new unused, German import
Salable / Supply Region
Global – Available via Rexroth authorized industrial hydraulics distributors
Applicable Industries
Heavy injection molding / die‑casting machines
Metallurgy – rolling mill auxiliaries, forging press clamps
Mining – centralized HPUs, crusher adjusters, roof‑support test rigs
Oilfield – skid‑mounted well‑service HPUs, BOP test benches
Marine – deck machinery open‑circuit power packs
Industrial test benches
Model Code Breakdown
A4VSO – Axial piston variable pump, open circuit
355 – Displacement 355 cm³/rev
DFR – Pressure & Flow controller (flow held constant by Δp sensing across throttle orifice + pressure cut‑off adjustable mechanically)
30 – Design Series 30
L – Counter‑clockwise rotation (viewed from shaft end)
PPB13N00
PP – Through‑drive capable, ISO 4‑bolt flange
B13 – SAE flange side ports (P & T 90° apart)
N00 – No auxiliary pump / no special option on through‑drive
Frequently Asked Questions
What does DFR (Pressure & Flow Controller) do?
DFR is a composite hydraulic controller:
Flow Control: Maintains constant pump flow by sensing the pressure drop (Δp) across an external orifice/throttle
Pressure Limiting: Overlays a mechanical pressure cut‑off – when system pressure reaches the set spring value, the pump strokes down
DFR requires a pilot pressure source and a properly sized flow-control orifice in the downstream circuit.
What is the difference between DFR and DFR1?
DFR: Pilot oil port X is open (connected internally); standard version
DFR1: Pilot oil port X is plugged / without orifice – used when the load‑sensing signal is supplied externally
Verify your system's pilot plumbing before selecting DFR vs DFR1.
Can I mount a second pump on the back?
Yes. The PPB code indies through‑drive capability. An A4VSO (same or smaller) or gear pump can be flange‑mounted on the rear. N00 = no auxiliary pump pre‑fitted, through‑drive shaft is present.
What are critical installation points?
Case Drain: Plumb directly to tank, backpressure ≤ 1.5-2 bar
Suction Line: Keep short & large‑diameter; absolute inlet pressure ≥ 0.8 bar
Pilot / Sensing Lines (DFR): Ensure pilot pressure is available and flow‑sensing orifice is correctly sized
Rotation Check: "L" = counter‑clockwise from shaft end
Bleed: Fill case and suction with oil, vent before first start‑up
Is a system relief valve still required with DFR?
Yes, strongly recommended. DFR provides pressure cut‑off under normal conditions but has finite response time. A system safety relief valve protects against spikes from thermal expansion or control lag.
What oil cleanliness is required?
Maintain ISO 4406 18/16/13 (NAS 1638 Class 8-9) minimum using a return‑line filter β₁₀ ≥ 200 (10 µm nominal). Contamination is the primary cause of A4VSO premature wear.
Is this the main pump for a wheel loader or excavator?
No. A4VSO is an industrial open‑circuit pump. Mobile wheel loaders/excavators typically use A4VG (closed) or A11VO (open axial) as travel/main pumps. A4VSO with DFR may be used in loader factory test benches, auxiliary stationary HPUs, or mine‑site industrial hydraulic stations.
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...
