CMFDA Series Hydraulic Gear Motor | CMFDA-E320-ALPS E306 E308 | High Pressure Gear Motor

LIC Hydraulic’s CMFDA Series High-Pressure External Gear Motors are premier execution components designed for auxiliary drives in mobile machinery and industrial conveyor systems. Renowned for their lightweight aluminum construction and high-pressure resilience, the CMFDA series (including models E306, E308, and E320) offers exceptional power-to-weight ratios. We guarantee 100% Drop-in Interchangeability, with all units matching OEM shaft specifications (ALPS codes), mounting patterns, and torque curves. Every motor undergoes 100% simulated load testing to ensure peak mechanical efficiency and ultra-smooth rotation throughout the speed range.

Technical Specifications (Bulleted List)

• Series Identification: CMFDA Series (High-Pressure Gear Motor)

• Key Models: CMFDA-E320-ALPS, CMFDA-E306-ALPS, CMFDA-E308-ALPS

• Displacement Options: 6.0 cm³/rev (E306) to 20.0 cm³/rev (E320)

• Nominal Pressure: 21 MPa (210 bar / 3045 PSI)

• Peak Pressure: 25 MPa (250 bar / 3625 PSI)

• Speed Range: 500 RPM – 3500 RPM

• Rotation/Porting: ALPS standard configuration

• Housing Material: High-tensile extruded aluminum alloy

• Shaft Type: Keyed or Splined (configuration dependent)

Key Technical Advantages

• Dual-Directional Pressure Compensation: Features a symmetric pressure-balanced plate design that automatically adjusts axial clearances. This ensures high volumetric efficiency and delivers exceptionally low starting pressure for heavy-load startups.

• High-Load DU Bushings: Equipped with specialized self-lubricating composite bearings that provide superior radial load support. This is critical for fan drives or belt-driven applications where side loads are present.

• Precision Micro-Finished Gears: The gears are induction-hardened and ground to micron tolerances, ensuring smooth engagement. This eliminates “crawling” at low speeds and reduces operational noise by 3-5 dB.

• Reinforced Shaft Seal System: Standardized with high-pressure resistant lip seals, allowing the motor to operate under higher back-pressure conditions without external leakage, simplifying return-line plumbing.

Application Areas

• Construction Equipment: Radiator fan drives for excavators/loaders and auxiliary rotary circuits.

• Agricultural Machinery: Seeder drives, harvester reel rotation systems, and spreader motors.

• Industrial Automation: Lightweight conveyor belt drives and small-scale hydraulic agitators.

Expert Maintenance Tips

• Drain Line Considerations: While CMFDA motors feature high-pressure seals, for larger displacements like the E320, we recommend monitoring back-pressure. If it consistently exceeds 2 bar, an external drain line is advised to maximize seal life.

• Filtration Standards: Gear motors are sensitive to hard particulates. Maintain a system cleanliness level of ISO 4406 18/16/13 or better to prevent internal scoring and efficiency loss.

• Pre-Start Priming: After installation, fill the motor with clean hydraulic fluid and “jog” the system initially. This ensures that the rotating group is fully lubricated before full operational pressure is reached.