A2FO Rexroth Hydraulic Piston Pump Spare Parts 400Bar

Product Overview

This product line features high-precision replacement spare parts engineered for Bosch Rexroth A2FO series (covering A2FO10, A2FO12, A2FO16, A2FO23, A2FO28, A2FO32, and A2FO56 frame sizes) fixed-displacement bent-axis hydraulic axial piston pumps. Manufactured strictly in compliance with OEM engineering drawings, metallurgy standards, and micron-level tolerances, these replacement parts include complete rotary groups: cylinder blocks, pistons with rings, valve plates, drive shafts, center pins/ball guides, retaining plates, disc springs, and high-pressure seal kits. Delivering 100% drop-in interchangeability, these components allow seamless direct substitution during pump remanufacturing and field service. Every spare part kit undergoes 100% factory bench testing under simulated 400 bar extreme pressure conditions to ensure volumetric efficiency and mechanical reliability.

Technical Specifications

• Compatible Pump Models: Bosch Rexroth A2FO Series 6x (A2FO10, A2FO12, A2FO16, A2FO23, A2FO28, A2FO32, A2FO56)

• Displacement Range: $10.3\ \text{cm}^3/\text{rev}$ to $56.1\ \text{cm}^3/\text{rev}$

• Nominal Pressure Rating: 315 bar (31.5 MPa) to 350 bar (35 MPa)

• Peak Shock Pressure: 400 bar (40 MPa) to 450 bar (45 MPa)

• Maximum Operating Speed: 3150 rpm to 6000 rpm (depending on displacement size)

• Available Spare Part Items: Cylinder block, pistons with rings, valve plate (CW/CCW), drive shaft, center pin/ball guide, retaining plate, disc spring, bearing & seal kits

• Material & Metallurgy: High-tensile friction-resistant bronze alloy cylinder, nitrided steel pistons, micro-lapped sealing interfaces

• Component Net Weight: Approx. 1.2 kg to 8.5 kg (depending on frame size and part selection)

Key Technical Advantages

• 100% Drop-In OEM Interchangeability: Critical dimensions—including valve plate spherical profiles, piston ball diameters, shaft splines, and bearing tolerances—match OEM specifications precisely for direct substitution without machining.

• Superior Bimetallurgy & Anti-Galling Properties: Cylinder blocks cast from centrifugally-formed wear-resistant bronze, paired with surface-nitrided steel pistons, provide exceptional resistance against thermal galling and wear under 400 bar pressure.

• High Volumetric Efficiency & Low Noise: Valve plates and cylinder block mating surfaces undergo ultra-precision lapping ($Ra \le 0.1\ \mu\text{m}$) with optimized timing grooves to minimize internal fluid bypass and hydraulic pulsation noise.

• 100% Factory Bench Tested: Rotary group assemblies are subjected to full-load 400 bar pressure holding and flow efficiency testing under simulated field conditions prior to dispatch.

Application Areas

• Construction Machinery: Excavator swing and travel drive pumps, mobile crane winches, and rotary drilling rigs.

• Industrial Presses & Manufacturing: High-pressure forging presses, injection molding machinery, and hydraulic power units.

• Marine & Offshore Engineering: Deck cranes, anchor winches, and marine hydraulic steering stations.

Expert Maintenance Tips

• Tribological Pair Pre-Lubrication: Always replace the valve plate and cylinder block in matching pairs. Apply clean hydraulic oil to running interfaces before manual alignment and installation; never assemble dry.

• Piston-to-Bore Clearance Verification: Check each piston for smooth, unhindered motion inside its corresponding cylinder bore prior to assembly to prevent thermal scoring during high-speed operation.

• Case Priming & Fluid Filtration: Fill the pump housing completely with clean, filtered hydraulic oil (ISO 4406 18/16/13 or cleaner) before initial startup. Hand-rotate the drive shaft several turns to ensure zero mechanical interference.