AA2FM90 Hydraulic Motor MIXER Truck Parts Concrete Drum Drive Motor

Product Specification

Mixer hydraulic motor AA2FM90

Color:Customized

Lead Time:30 days

ISO 9001:2015 certification

Mixer Hydraulic Motor AA2FM90: Unmatched Power and Precision for Concrete Drum Drive

In the demanding world of concrete mixing, where every revolution counts, the reliability and power of the drum drive system are paramount. At the heart of this system lies the hydraulic motor, the component that translates hydraulic energy into the immense, unwavering torque required to mix, transport, and discharge concrete efficiently. The AA2FM90 axial piston fixed displacement motor from the renowned Rexroth A2FM series represents the pinnacle of this technology. As a professional manufacturer specializing in high-precision hydraulic components, we produce motors that meet or exceed the original design specifications of the AA2FM90, delivering the robust performance, exceptional durability, and consistent reliability that mixer truck operations demand.

We go beyond simple replication. Our production leverages advanced material science, state-of-the-art machining, and rigorous testing to ensure every motor not only fits perfectly but also extends service life and enhances system efficiency for your fleet.

1. Product Parameter (specification)

 Rexroth AA2FM of AA2FM90 mixer hydraulic motor

Structure: It adopts an axial - tapered - piston rotary group with a bent - axis design. This structure enables the motor to achieve high - power density within a compact size, making it suitable for installation in mixer trucks with limited space.

Working Principle: The AA2FM90 operates based on the principle of converting hydraulic energy into mechanical energy. Hydraulic oil enters the motor under pressure, causing the pistons to move. The movement of the pistons drives the rotation of the output shaft, thereby providing the necessary torque to drive the rotation of the mixer drum. The output torque of the motor is proportional to the pressure difference between the high - pressure and low - pressure sides. The greater the pressure difference, the higher the output torque.

Selection Guidelines:

Verify System Compatibility: Confirm the motor's displacement (90 cm³/rev) matches your original system design for correct torque and speed. Check the mounting flange (SAE standard), shaft type (spline/key), and port thread specifications to ensure a perfect physical fit.

Pressure and Speed Requirements: Ensure your system's maximum working pressure does not exceed the motor's 32 MPa continuous rating. Verify that the required operational speed range is within the motor's capabilities.

Choose the Correct Service Option: For a motor with localized wear (e.g., worn seals but good internals), a repair kit may be sufficient. For motors with broad wear or bearing issues, a complete remanufactured unit is the most reliable and cost-effective long-term solution.

Critical Maintenance & Installation Procedures:

Flawless Installation:

Alignment: For direct or geared coupling, laser alignment is critical. Misalignment imposes destructive side loads on the motor shaft and bearings. Maximum allowable runout is typically <0.1mm TIR.

Priming and Bleeding: The motor must be fully primed with clean hydraulic oil before start-up. Bleed air from the case drain line by loosening the connection (with a catch pan) during initial low-speed, no-load operation.

Proactive Monitoring Regimen:

Oil Analysis: Implement a regular oil analysis program. Trending particle counts, viscosity, and acid number (TAN) provides the earliest possible warning of contamination, wear, and fluid degradation.

Performance Checks: Monitor for changes in drum speed under load (indicating motor slippage) and unusual noises. Periodically check case drain line temperature; a hot line indicates abnormally high internal leakage.

Scheduled Overhaul: Based on industry data, a proactive overhaul at 8,000-10,000 service hours is recommended for motors in severe duty. This pre-empts catastrophic failure and is far more economical than unplanned downtime and potential damage to the gearbox or drum.

2. Production details