Rexroth A6VM bent-axis hydraulic motor for the Mecalac wheel loader 4182177A/2 5370119 5370259 5370263 5370275 537A0243

The A6VM is a variable-displacement axial piston motor from Bosch Rexroth's mobile hydraulics catalog, built on a bent-axis architecture rather than the swashplate design used in Rexroth's A6VE or A2FE lines. It's designed for closed-circuit hydrostatic drives — exactly the kind of circuit that powers the wheels (or tracks) on construction equipment.

Key characteristics of the A6VM family:

Displacement range: typically from around 28 cm³ to 1000 cm³ per revolution across the size series (A6VM28 through A6VM1000), giving OEMs like Mecalac a size to match nearly any loader class.

Pressure capability: nominal pressures commonly rated around 350–400 bar, with peak pressures up to roughly 450 bar depending on size and series.

Variable displacement control: the swivel angle of the cylinder block changes to adjust displacement, which lets the motor deliver high torque at low speed (for digging, climbing grades, or creeping under load) and high speed at low torque (for road travel).

Control options: hydraulic, electro-hydraulic (EP), or electric proportional control variants, letting Mecalac's control system manage the motor's swivel angle automatically based on load and travel-speed demand.

Key Specifications to Match When Sourcing an A6VM for a Mecalac Loader

Because the A6VM comes in dozens of size and configuration variants, matching the right one to a specific Mecalac model is not optional — it's the difference between a loader that drives correctly and one that overheats, crawls, or trips fault codes.

1. Displacement Size (cm³/rev)

The frame size must match the original unit (e.g., A6VM107, A6VM160, A6VM200 are common sizes in this equipment class). Installing an undersized motor sacrifices torque; an oversized one can overload the final drive and change the loader's speed/torque curve.

2. Control Type

Hydraulic (HD/HA) control — displacement set by pilot pressure.

Electro-proportional (EP) control — displacement set by an electrical signal from the machine's controller, common on newer Mecalac units with electronic drivetrain management.

Mismatching control type is one of the most common sourcing mistakes — a hydraulically controlled unit won't respond to an EP wiring harness, and vice versa.

3. Shaft and Mounting Configuration

Splined shaft type, flange bolt pattern, and porting configuration (SAE flange sizes, port locations) must match the final drive housing exactly, since the A6VM is typically flange-mounted directly to the axle or planetary reduction unit.

4. Charge Pressure and Relief Valve Settings

These are set to work with the paired A4VG pump and the loader's specific hydraulic architecture — swapping settings between models can cause cavitation or excess heat.

Maintenance and Longevity Best Practices

Oil cleanliness is everything. Bent-axis motors run tight tolerances between pistons and cylinder bores; contamination is the single biggest driver of premature wear. Follow Mecalac's specified filtration (typically ISO 4406 cleanliness targets) and change filters on schedule, not just on the calendar.

Monitor case drain flow. A rising case drain flow rate over time is an early indicator of internal wear before performance symptoms appear.

Respect charge pressure specs. Low charge pressure starves the motor of makeup oil during direction changes and accelerates cavitation damage.

Use OEM-matched or Rexroth-certified remanufactured units. Because pump and motor are matched as a hydrostatic set, mixing mismatched displacement curves between a rebuilt motor and the original pump can undercut efficiency even when both units "work."

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Q1: Why does my loader lose power only when climbing a grade?

A1: This pattern often points to the motor not reaching full displacement under load — check the EP control signal, servo piston movement, and system pressure before assuming a mechanical failure inside the motor.

Q2: How do I identify the exact A6VM variant on my machine?

A2: The nameplate on the motor housing carries Rexroth's full type code (e.g., A6VM107HA1T1/60W-VSC...) along with a material number. Cross-reference this against Mecalac's parts catalog for your loader's serial number rather than ordering by displacement size alone, since control type and port configuration affect fit and function.

Q3:What is the price and delivery time of the Rexroth A6VM motor for the Mecalac wheel loader?

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

Q4: How to purchase a Rexroth A6VM motor for the Mecalac wheel loader?

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