Replacement Rexroth A4VSO355/ 500/ 750 hydraulic pump

Replacement Rexroth A4VSO355/ 500/ 750 hydraulic pump

2 month ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 3 year year

Product details

Rexroth A4VSO355/500/750 Hydraulic Pumps

1. Key Product Overview

TheRexroth A4VSO series(A4VSO355/500/750) areaxial piston variable displacement pumpsdesigned for high-pressure hydraulic systems in heavy-duty applications (e.g., construction machinery, marine propulsion, and industrial presses).

• Displacement Options:

• A4VSO355: 355 cm³/rev

• A4VSO500: 500 cm³/rev

• A4VSO750: 750 cm³/rev

• Pressure Rating: Up to400 bar (5,800 psi)

• Speed Range: 600–2,800 rpm

• Control Options:

• DR(Pressure/Flow Control)

• DP(Pressure Control)

• DE(Electro-Hydraulic Control)

• LR(Load-Sensing Control)

2. Replacement Considerations

When replacing an A4VSO pump, ensure compatibility indisplacement, control type, mounting, and interface dimensions.

A. Direct Replacement Options

• Original Rexroth Models:

• A4VSO355DR/30R-PPB13N00(355 cm³, DR control)

• A4VSO500LR2D/30R-VPB25UOO(500 cm³, LR control)

• A4VSO750EO2/30R-PPB13N00(750 cm³, DE control)

• Aftermarket Alternatives(Certified for Rexroth Specs):

• Bosch Rexroth Compatible Series(e.g., Parker PV series, Kawasaki K3V variants with equivalent displacement).

B. Key Parameters to Match

【表格】

Parameter Recommendation

Displacement (cm³/rev) Must match original (355/500/750).

Control Type DR/DP/DE/LR must align with system design.

Shaft Type SAE spline, keyed, or flanged (verify).

Port Size/Thread Must match manifold/hose connections.

Mounting Flange SAE A, B, or custom (confirm with OEM).

3. Technical Verification Steps

1. Check System Requirements:

• Confirmflow rate (L/min)andpressure (bar)needs.

• Example:

• A4VSO500 at 1,800 rpm → Max flow = 500 × 1,800 / 1,000 =900 L/min.

2. Review Control Logic:

• If original usesload-sensing (LR), replacement must support proportional pressure/flow adjustment.

3. Inspect Shaft/Port Compatibility:

• Misalignment may cause leaks or premature failure.

4. Aftermarket vs. OEM Replacement

【表格】

Factor OEM (Rexroth) Aftermarket (Certified)

Cost Higher (premium pricing) 30–50% cheaper

Warranty 1–2 years 6–12 months

Lead Time 4–6 weeks (custom orders) 2–4 weeks (stock items)

Performance Factory-tuned for peak efficiency May require minor adjustments

5. Installation & Maintenance Tips

• Pre-Installation Checks:

• Clean hydraulic system to avoid contamination.

• Verify shaft alignment within0.05 mm TIR.

• Break-In Procedure:

• Run at50% loadfor 2 hours, then gradually increase to full load.

• Regular Maintenance:

• Change oil filter every500 hours(ISO 46 hydraulic oil recommended).

• Inspect shaft seals annually for leaks.

6. Troubleshooting Common Issues

【表格】

Symptom Likely Cause Solution

Low Flow Worn pistons/swash plate Replace pump or major components.

Excessive Noise Air in system, cavitation Bleed air, check oil level.

Overheating Incorrect viscosity, high internal leakage Use ISO 46 oil, check seals/valves.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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3 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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