Rexroth A7VO107 axial piston open circuit hydraulic pump

The A7VO107 is a variable displacement axial piston pump designed for open circuit hydraulic systems. It belongs to Bosch Rexroth's A7VO series, a product family engineered for high-pressure, high-efficiency applications where responsive flow control is critical.

The "107" in the designation refers to the pump's geometric displacement of 107 cm³/rev (6.53 in³/rev) — its defining size class within the A7VO lineup, which spans from 28 cm³/rev up to 500 cm³/rev.

Installation and Integration Considerations

Fluid Requirements

The A7VO107 is designed for mineral hydraulic oil (HLP type per ISO VG 46 or 68) as standard. For biodegradable or fire-resistant fluids, confirm compatibility with the seal specification — FKM seals are typically required for HF-type fluids.

Viscosity at operating temperature should remain in the 16–36 mm²/s (cSt) range for optimal performance. Cold start viscosity should not exceed 1,000 cSt — important in northern climate applications.

Case Drain Line

The A7VO107, like all axial piston pumps, requires an external case drain line connected back to the tank above the fluid level. The case drain carries:

Leakage oil from the rotating group

Heat generated within the pump housing

Restriction in the case drain line leads to elevated case pressure, which damages shaft seals and can cause catastrophic failure. Maximum allowable case pressure is typically 3 bar (43 psi) — always verify with the Rexroth data sheet for the specific variant.

Shaft Loading

Avoid excessive radial or axial loads on the pump shaft. The A7VO107's shaft is rated for specific overhung load limits (typically 0 N radial load at the shaft nose for direct SAE drive arrangements). Use flexible couplings where possible, and ensure drive shaft alignment is within 0.05 mm TIR.

Filtration

Rexroth recommends 10 µm (ß10 ≥ 75) filtration in the return or pressure line for optimal component longevity. Suction filtration alone is insufficient for axial piston pumps — dedicated return line filters or off-line filtration are standard practice.

Maintenance and Troubleshooting

Routine Maintenance Intervals

Fluid analysis: Every 500–1,000 operating hours (or annually) — check viscosity, acid number, particle count, and water content

Filter element replacement: Per filter manufacturer's schedule or differential pressure indicator trigger

Case drain flow check: Periodically measure case drain flow rate; excessive flow indicates internal wear

Common Fault Indicators

Elevated noise (cavitation): Often a clogged suction strainer, collapsed hose, or fluid with excessive air entrainment. Cavitation rapidly destroys the piston/barrel interface.

Excessive heat: Could indicate high case drain restriction, system pressure relief valve chattering, or contaminated fluid with degraded viscosity.

Reduced output flow: May indicate a worn barrel/valve plate interface (reduced volumetric efficiency) or a control system failure preventing full displacement.

Shaft seal leakage: Almost always caused by excessive case pressure — check the drain line for blockage or excessive backpressure from the drain manifold.

Repair vs. Replacement

For high-cycle industrial applications, factory-reconditioned exchange units are often the most cost-effective option. Bosch Rexroth and authorised rebuilders offer remanufactured A7VO107 units with full performance certification. Field repair of the rotating group is possible but requires a clean environment, calibrated measuring equipment, and lapping tools — not practical outside a specialist workshop.

For more information on the A7VO107 hydraulic pump, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: What is the typical service life expectancy of an A7VO107?

A1: Under optimal conditions (clean oil, proper viscosity, no cavitation, case drain unrestricted), an A7VO107 can exceed **20,000 operating hours** in industrial service. Mobile applications with higher contamination exposure and more aggressive duty cycles typically see 8,000–15,000 hours before requiring rebuild or replacement.

Q2: Can I replace an A7VO107 with an A7VO107 from a different control type without modifying the hydraulic circuit?

A2: Generally, no. Each control variant requires a matching pilot signal from the hydraulic circuit. Substituting an EP control for an LR control, for example, would require adding an electronic command source and modifying the circuit — not a drop-in swap.

Q3: How to purchase an A7VO107 hydraulic pump?

A3: You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4: What is the price and delivery time of the A7VO107 hydraulic pump?

A4: The specific price and delivery time will be provided based on the specific model you provide.