Bosch Rexroth A2FM fixed hydraulic motor for Liebherr crane 510229308 512208314 512233314 512257514 510229414 10454450 5614481

The A2FM is a fixed-displacement axial piston motor. Its swashplate design allows for high starting efficiency and smooth operation even under heavy load. For Liebherr cranes—whether the LTM 1050-4.1 mobile crane or the LR 13000 crawler crane—space is always at a premium. The A2FM's compact footprint delivers maximum power without compromising the machine's overall layout.

How the A2FM Integrates with Liebherr's Control Systems

Plug-and-Play Compatibility

Modern Liebherr cranes use sophisticated electronic control units (ECUs) to manage hydraulic functions. The A2FM motor can be paired with Bosch Rexroth's MCR (Motion Control Rexroth) system, which provides real-time feedback on speed, torque, and temperature. This integration allows the crane operator to fine-tune movements via joystick inputs with millisecond response times.

Optional Add-Ons for Enhanced Functionality

Integrated brake valves: For fail-safe holding in winch applications.

Speed sensors: Enable closed-loop control for constant speed regardless of load variation.

Flushing valve: Improves oil cooling and extends motor life in continuous-duty applications.

Common Applications Across Liebherr Crane Models

Crawler Cranes: Unmatched Traction Control

In models like the LR 1400 SX, the A2FM is used in the track drive system. Because it offers high starting torque and smooth acceleration, the crane can traverse soft ground without digging in or losing traction. Operators report noticeably less jerking during directional changes compared to gear-driven alternatives.

Mobile Cranes: Winch Drives That Deliver

For telescopic cranes such as the LTM 11200-9.1, the A2FM drives the main hoist winch. Its ability to maintain constant torque from zero to full speed makes it ideal for lifting heavy loads slowly and precisely, then speeding up for lighter hook returns.

Offshore and Marine Cranes: Corrosion Resistance

Liebherr's offshore cranes, like the BOS 42000, rely on A2FM motors with special surface treatments for saltwater resistance. These variants feature nickel-plated pistons and stainless steel valve plates, ensuring longevity in corrosive marine environments.

Maintenance Best Practices for Maximum Lifespan

Fluid Cleanliness Is Non-Negotiable

The A2FM's tight internal clearances demand clean hydraulic oil. Use filtration to ISO 4406 18/15/13 or better. Contamination is the #1 cause of premature failure in these motors.

Recommended Service Intervals

Oil change: Every 2000 operating hours or annually.

Seal replacement: Every 3000 hours or if external leakage appears.

Pressure testing: Annually to ensure no internal bypass.

Common Signs of Wear

Reduced winch speed under load

Unusual noise (whining or knocking)

Oil temperature rising faster than normal

If any of these appear, perform a case drain flow test immediately. Flow rates exceeding 10% of nominal indicate internal wear and potential need for overhaul.

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Q1: What is the typical lifespan of an A2FM in a Liebherr crane?

A1: With proper maintenance, 8,000–12,000 hours is common. Many units exceed 15,000 hours in light-duty applications.

Q2: Is the A2FM interchangeable with other brands’ motors?

A2: Physically, mounting dimensions often match SAE standards, but control characteristics differ. Always consult Bosch Rexroth’s cross-reference guide before substituting.

Q3:What is the price and delivery time of the A2FM hydraulic motor for the Liebherr crane？

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

Q4:How to purchase a Liebherr crane hydraulic motor?

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