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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"}}
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EO2 — Electro-proportional displacement control with pilot pressure requirement (typically min. pilot pressure 50/100 bar for Size 355), pump swash angle proportional to electric command signal
EO2 — Electro-proportional displacement control with pilot pressure requirement (typically min. pilot pressure 50/100 bar for Size 355), pump swash angle proportional to electric command signal
EO2 - Electro-proportional displacement control with pilot pressure requirement (typically min. pilot pressure 50/100 bar for Size 355), pump swash angle proportional to electric command signal
EO2 - Electro‑proportional displacement control with higher pilot pressure requirement (vs EO1, typically min. 50/100 bar pilot pressure for Size 355, suitable for larger frames)
30 - Design Series 30
L - Counter‑clockwise rotation (viewed from shaft end)
PPB13N00 - ISO flange with through-drive (PP), SAE side ports (B13), no auxiliary pump (N00)
Frequently Asked Questions (FAQ)
1. What is the difference between EO2 and EO1 control?
Both EO1 and EO2 are electro-proportional displacement controls - pump flow is proportional to the electric command signal via a proportional solenoid + LVDT position feedback. The key difference: EO2 requires a higher external pilot pressure (typically min. 50 bar, often 100 bar for Size 355) to operate the control spool, whereas EO1 can work with lower pilot pressure (≈20 bar, sizes 40-250). EO2 is the version specified for larger displacements (Size 250/355/500+) in the A4VSO Series 30. Always confirm pilot pressure source is available in your hydraulic power unit.
2. Can I mount a second pump on the back?
Yes. The PPB mounting code indies through‑drive capability. You can flange-mount another A4VSO pump (same or smaller size) on the rear to form a tandem combination. N00 = no auxiliary gear pump pre-fitted on the through-drive shaft, but the through-drive shaft is present.
3. What are the critical installation points?
Case Drain (Leakage Line): Must connect directly to tank, backpressure ≤ 1.5-2 bar. Never tee into the main return.
Suction Line: Keep short & large-diameter; ensure absolute inlet pressure ≥ 0.8 bar to avoid cavitation. Use 100 µm suction strainer.
Pilot Pressure (EO2): Supply the EO2 pilot port with clean hydraulic oil at the required pilot pressure (≥ 50 bar, check nameplate - often 100 bar for Size 355).
Rotation Check: "L" = counter‑clockwise when viewed from shaft end - verify prime mover direction before coupling.
Bleed: Fill case and suction side with oil and vent before first start-up.
4. Does EO2 need a separate amplifier?
Yes. The pump has the proportional solenoid and LVDT onboard, but requires an external electronic amplifier (e.g. Rexroth VT 5035-1X or PLC analog output card) to supply the command signal (±10V / 4-20mA / PWM as specified) and 24V DC for the solenoid. The amplifier is ordered separately.
5. Is a system relief valve still required?
Yes, absolutely. EO2 controls displacement/flow only - it provides no pressure limiting function. You must install a properly sized system safety relief valve (e.g. DB type) in the pressure line.
6. What oil cleanliness is required?
Maintain hydraulic oil at ISO 4406 18/16/13 (NAS 1638 Class 8 -9) minimum, using a return-line filter with β₁₀ ≥ 200 (10 µm nominal). Contaminated oil is the leading cause of A4VSO pump failure.
7. What pilot pressure is needed for EO2 on Size 355?
For A4VSO Size 355 with EO2 control, the typical minimum pilot pressure is 50 bar, often specified as 100 bar depending on the exact sub-version. The pilot oil must be clean and sourced from the main system or a dedied pilot pump. Lack of adequate pilot pressure will cause the EO2 controller to fail to stroke the swash plate.
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...
