Rexroth ALA10VO variable displacement hydrauilc pump for the Grimme Harvester B92.04315 B92.04373 B92.05512 B92.05602 B92.05664 B92.04960

The ALA10VO is a variable displacement axial piston pump in a swashplate design, built for open-circuit hydraulic systems. Bosch Rexroth (whose axial piston heritage traces back to Brueninghaus Hydromatik) offers it in a range of sizes, commonly from about 18 up to 140 cm³ per revolution in the popular series, with nominal pressures around 280 bar and higher peak ratings depending on series and size. Always confirm exact figures against the datasheet for the specific series on your machine.

Why the ALA10VO Fits Grimme Harvester Hydraulics

Grimme Group, based in Damme, Germany, builds potato, beet and vegetable harvesting and handling machines. Their harvesters, from trailed units to self-propelled models, run multiple hydraulic functions at once.

Typical hydraulic loads on a root-crop harvester

Elevating and separating webs: continuous, variable-speed drives that see shock loads when stones or clods hit

Haulm topper and cleaning units: high-torque motors with changing demand

Steering, lift and depth control: intermittent but precision-critical cylinders

Bunker and unloading conveyors: high flow demand over short bursts

What the pump has to handle

These loads are uneven and often sudden. A pressure-compensated or load-sensing variable pump handles that well: it holds pressure, adjusts flow as functions switch on and off, and avoids dumping excess oil over the relief valve. The A10VO's compact, robust build is also a good match for the dust, vibration, and temperature swings of harvest season.

Which A10VO size and control your machine uses depends on the model, year, and configuration. Grimme's parts documentation or your authorized dealer can confirm it by serial number.

Common Failure Modes and Symptoms

Most A10VO problems announce themselves early. Catching them saves the pump, and often the rest of the system.

Symptom: slow or weak functions under load

Possible causes: internal wear reducing volumetric efficiency, a mis-set or sticking compensator, or a worn control piston. Example: a topper that spins freely but stalls the moment it meets heavy haulm may point to a pump that can no longer hold pressure at full load.

Symptom: overheating oil

Worn internals leak across the pistons and slippers, and that internal leakage turns directly into heat. If the oil cooler is clean and the oil level is correct but temperatures keep climbing, check the case drain flow. Excessive case drain is a classic sign of wear.

Symptom: noise, whine, or knocking

Cavitation (air or insufficient oil reaching the inlet) is the usual culprit. Check suction hoses, clamps, the inlet strainer and oil level. Aeration is damaging, so don't ignore a pump that sounds "gravelly."

Symptom: metal in the oil or filter

This is serious. Ferrous or bronze particles indicate wear on pistons, slippers, the valve plate, or bearings. Stop, investigate, and flush the system, because debris will travel into valves and motors.

Root causes worth knowing

Contamination: the leading killer of axial piston pumps. Field dust and poor filter maintenance are the main sources.

Wrong or degraded oil: viscosity outside the pump's recommended range accelerates wear.

Running dry at start-up: the case should be filled with oil before the first start after installation.

Overpressure and shock loads: repeated relief-valve events stress internal parts.

Maintenance Practices That Extend Pump Life

Keep the oil clean

Follow the machine manufacturer's filter intervals, use the specified hydraulic fluid, and sample the oil during the off-season. Cleanliness targets for piston pumps are strict, so consult the Rexroth datasheet or an ISO 4406 cleanliness reference for the grade your system should hold.

Check before the season, not during it

A pre-season routine might include checking case drain flow, inspecting suction lines for air leaks, verifying pressure settings against the machine manual, and replacing filters. A few hours in the workshop in winter is cheap compared with a pump failure mid-harvest.

Install correctly

When fitting a new or reconditioned pump, fill the case with clean oil, bleed the system, confirm rotation direction, and start at low speed before applying load. Many early failures trace back to installation errors, not manufacturing defects.

For more brands and equipment models, please visit https://www.baolilaihydraulic.com/brand/

Q1: What is the Rexroth A10VO pump used for?

A1: It supplies hydraulic power in open-circuit systems on mobile and industrial machines, including agricultural equipment like harvesters, where variable flow improves efficiency.

Q2: How do I know which A10VO my Grimme harvester uses?

A2: Read the nameplate on the pump itself and note the full type code and material number. If it is unreadable, your Grimme dealer can look up the specification by machine model and serial number.

Q3: What are the price and delivery time for the ALA10VO hydraulic pump for the Grimme Harvester?

A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.

Q4: How do I purchase an ALA10VO hydraulic pump for the Grimme Harvester?

A4: Visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.