Bosch Rexroth A20VO double hydraulic pump for the Terex Material handler 15343172 28046512 5364662400 R902480087

The A20VO is a variable displacement axial piston pump from Bosch Rexroth designed for open-circuit hydraulic systems. It uses a swashplate design: pistons in a rotating cylinder block slide against a tilting swashplate, and changing the swashplate angle changes displacement, and therefore flow.

A double pump, also called a tandem pump, is two pump units sharing one drive shaft. The first pump is driven directly by the engine (or pump drive/splitter gearbox), and a second pump is flanged to the first through its through-drive. Each section has its own inlet and outlet, so a single driveline feeds two independent hydraulic circuits.

Why Terex Material Handlers Use Tandem Axial Piston Pumps

Multiple circuits, one compact package

A material handler needs to run several functions at once: boom lift, stick movement, slewing, and grapple operation. Splitting flow between two pump sections helps the machine keep functions independent so that, for example, a heavy boom lift doesn't starve the grapple.

Flow on demand reduces fuel burn

Because the A20VO is a variable pump, flow follows demand. When the operator pauses between picks, the pump destrokes to a low-flow standby state rather than pushing oil over a relief valve. In a yard doing hundreds of cycles per shift, that translates into lower heat, less wasted fuel, and longer oil life.

Space and weight efficiency

A tandem arrangement on one drive pad is more compact than mounting two separate pumps, which matters in a machine where the engine bay is already crowded.

Fits demanding duty cycles

Terex Fuchs machines, such as the MHL-series material handlers, work in recycling, scrap, timber, and bulk handling. These applications involve rapid direction changes, shock loads, and contaminated environments, all of which are hard on hydraulic components. Axial piston pumps handle this better than many lower-grade alternatives, provided the oil is kept clean.

Common Causes of Pump Failure

Contamination

Dirty oil is the leading killer of axial piston pumps. Fine particles score the piston bores, shoes, and valve plate. Follow the cleanliness targets in your machine's manual, typically expressed under ISO 4406.

Cavitation and aeration

Restricted inlet lines, clogged suction strainers, low oil level, or loose fittings let air or vapor bubbles form. When they collapse inside the pump, they erode metal surfaces.

Overheating

Oil that runs too hot thins out, reducing lubrication and accelerating wear. Clogged coolers, low oil level, or a failing relief setting are common triggers.

Incorrect oil

Using the wrong viscosity or a non-approved fluid shortens component life. Stick to the oil grade specified by Terex and Bosch Rexroth.

Poor installation or startup

Failing to fill the pump housing with oil before first startup can destroy a new pump within minutes through dry running.

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Q1: What is a Bosch Rexroth A20VO pump used for?

A1: It’s a variable displacement axial piston pump for open-circuit hydraulic systems, widely used in mobile machinery such as excavators and material handlers.

Q2: What is the difference between a single and a double hydraulic pump?

A2: A single pump has one pumping unit; a double (tandem) pump has two units on a shared drive shaft, supplying two separate circuits or higher combined flow.

Q3:What is the price and delivery time of the Rexroth A20VO pump for the Terex Material handler?

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

Q4: How to purchase an A20VO hydraulic pump for the Terex Material handler?

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