Short Description
Premium factory-direct aftermarket Rexroth A4VSO Series Axial Piston Pump Spare Parts and Overhaul Rebuild Kits, precision-engineered as 100% precision drop-in alternatives for heavy-duty industrial open-circuit systems. Covering full industrial frame displacements from A4VSO40 up to A4VSO500 (Series 10, 22, & 30), our massive inventory features advanced heavy-duty bimetal cylinder blocks and hardened piston groups designed to completely eliminate internal high-pressure bypass and comfortably sustain severe continuous industrial pressures up to 400 bar in steel rolling mills, forging presses, and marine deck machinery.
Key Highlights
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100% Micro-Metric Blueprint Matching: Fully reverse-engineered to precise Bosch Rexroth original factory dimensional metrics and clearances. Fits seamlessly into existing OEM industrial pump housings with zero structural mismatch, play, or shaft binding.
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Upgraded Copper-Plated Heavy Cylinder Blocks: Our A4VSO cylinder barrels utilize advanced bimetal lead-bronze cladding fusion techniques, drastically extending boundary lubrication, reducing friction coefficient, and preventing micro-cracking under intense casing thermal shocks.
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Induction-Hardened Pistons with Lapped Slipper Shoes: Piston assemblies are forged from premium structural alloy steel and undergo severe induction hardening to 60-62 HRC. Slipper shoe surfaces are micro-lapped to absolute flatness, mitigating shoe-off-plate failure during high-speed variable stroking.
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One-Stop High-Displacement Inventory: Comprehensive structural kits ready for immediate global logistics, including Cylinder Blocks (Barrels), Piston Shoes with Retainer Plates, Valve Plates, Ball Guides, Drive Shafts, Swash Plate Assemblies, Cradle Saddle Bearings, Control Pistons, and complete High-Temperature Viton (FKM) Seal Kits.
HTML Table
| Compatible Pump Frame Sizes | Available Internal Spare Parts & Components | Industrial Applications & System Class |
|---|---|---|
| A4VSO40 / A4VSO71 / A4VSO125 | Cylinder Block (Barrel), Piston Group (Piston Shoes), Valve Plate (Left/Right Hand), Retainer Plate (Set Plate), Ball Guide, Central Pin, Drive Shaft (Keyed or Splined), Saddle Bearings, Swash Plate Assembly, Position Indicators, Premium High-Pressure FKM (Viton) Seal Kits. | Rated Working Pressure: 350 bar / Peak Intermittent: 400 bar. Primarily deployed in heavy industrial hydraulic power units, metallurgy steel production lines, ceramic moulding presses, metal forging machinery, and large shield tunneling machines. |
| A4VSO180 / A4VSO250 / A4VSO355 | ||
| A4VSO500 / A4VSO750 |
FAQ
Q1: Heavy industrial systems using A4VSO pumps utilize varied control heads (e.g., DR, DFR, LR, MA, EO). Do your parts match all control series? A: Yes, absolutely. The internal core rotating components (cylinder blocks, pistons, valve plates) are standard across identical displacement frames regardless of the controller type. However, for specialized variable controls like the EO (Electronic Proportional) or HD (Hydraulic Pilot Control), specific internal bias springs or servo control cylinders may vary. Please share your complete model string from the nameplate (e.g., A4VSO250DFR/30R-PPB13N00) for precise component layout mapping.
Q2: Steel mills and forging plants operate under heavy thermal shocks. How do your A4VSO parts resist scaling and seizure? A: Industrial setups generate severe oil temperature spikes. To prevent thermal expansion failures, our A4VSO replacement parts use upgraded bimetallic alloy layers on the cylinder block faces and specialized nitriding treatments on the piston bodies. This guarantees an stable coefficient of thermal expansion, ensuring full volumetric retention and zero seizure risk even when running continuously at peak operating parameters.
