Parker M5 M4 High Performance Fan Drive Motor | M5B M5BS M5BF

The Parker Denison M5 and M4 Series from LIC Hydraulic are premium High-Performance Vane Motors engineered specifically for high-speed Fan Drive applications. Renowned for their compact design and high power density, models like the M5BS 012 1N00 B102 and M5B 012 1N00 B1M3 are the preferred choice for cooling systems in excavators, tractors, and heavy trucks. We guarantee 100% mechanical interchangeability with original Parker Denison units. Each motor undergoes 100% high-speed dynamic balancing and full-load pressure testing, ensuring quiet operation and long-term reliability even at speeds up to $4000\text{ RPM}$.

Technical Specifications (Bulleted List)

• Series: Parker M5 (M5A, M5B, M5BS, M5BF) & M4 Series

• Example Models: M5BS 012 1N00 B102, M5B 012 1N00 B1M3

• Displacement: $6.3\text{ to }45.0\text{ cm}^3\text{/rev}$ ($0.38\text{ to }2.75\text{ in}^3\text{/rev}$)

• Max Operating Pressure: $300\text{ bar}$ ($4350\text{ psi}$)

• Max Speed: Up to $4000\text{ RPM}$ (Continuous)

• Rotation: Uni-directional or Bi-directional options

• Mounting: SAE standard flanges and shafts (Splined/Keyed)

Key Technical Advantages

• Pressure Balanced Vane Design: The balanced design minimizes internal friction and wear, allowing for consistent performance throughout the motor’s lifespan and reducing startup torque requirements.

• Superior NVH Performance: Vane technology provides much smoother flow with lower pulsation compared to gear motors, resulting in ultra-quiet operation—a critical factor for modern engine cooling systems.

• Floating Side Plate Technology: Automatically compensates for axial clearances, ensuring high volumetric efficiency even as hydraulic oil thins at high operating temperatures.

• High Speed Reliability: Engineered to withstand the thermal and mechanical stresses of continuous high-speed rotation, making it ideal for the demanding duty cycles of off-road cooling fans.

Application Areas

• Engine Fan Drives: Hydraulic cooling fan drives for excavators, motor graders, and mobile cranes.

• Agricultural Equipment: Radiator fans for harvesters and high-speed blowers for air seeders.

• Industrial Cooling: Powering air-blast oil coolers for large-scale hydraulic power units (HPUs).

• Municipal Machines: Drive motors for street sweeper brushes and vacuum fans.

Expert Maintenance Tips

• Case Drain Management: Always ensure the external case drain line is connected directly to the tank with no obstructions. High case pressure is the #1 cause of shaft seal failure in M5 motors.

• Inertia Protection: Due to the high inertia of radiator fans, ensure that anti-cavitation check valves or integrated relief valves are functioning correctly to prevent vacuum damage during rapid deceleration.

• Cleanliness Standard: To protect the precision-lapped vanes and cam rings, maintain a filtration level of ISO 18/16/13. Fine particles can score the cam ring surface, leading to a significant loss of speed and torque.