M5BF1 036 1R00 B1MX Parker Denison Fixed Vane Motor 36 ml/rev 320 bar

Product Overview

The M5BF1 036 1R00 B1MX (OEM part number 054-35321-0) is a high-performance fixed-displacement vane motor from the Parker Denison (formerly Denison Hydraulics) M5 series. Engineered for severe-duty applications demanding high pressure, high speed, and operation with low-lubricity fluids, it features a patented 12-vane cartridge design that delivers exceptional volumetric efficiency and starting torque. Fully interchangeable with genuine Parker Denison units, this motor allows direct drop-in replacement without modification to mounting interfaces or piping. Every unit undergoes 100% simulated operating-condition testing to guarantee consistent performance and reliability in demanding industrial and mobile environments.

Technical Specifications 

• Model: M5BF1 036 1R00 B1MX (OEM P/N 054-35321-0)
• Displacement: 36.0 ml/rev (cm³/rev)
• Continuous / Rated Pressure: up to approx. 290 bar
• Intermittent / Peak Pressure: up to 320 bar (M5B* 012–036 series)
• Maximum Speed: intermittent up to 4000 rpm, continuous approx. 3000 rpm
• Theoretical Torque: 0.572 Nm/bar
• Control / Rotation: Fixed displacement, unidirectional clockwise (R) with anti-cavitation check valve, internal drain (no external drain port, code X)
• Shaft Type: Keyed taper (code 1, non-SAE)
• Mounting: Special 2-bolt flange, pilot Ø135 mm (suitable for direct fan-drive mounting)
• Ports: SAE ¾” 4-bolt flange (metric thread)
• Seals: Buna-N (standard for mineral oil)
• Weight: approx. 18.5 kg
• Brand / Series: Parker Denison M5BF1 fixed-displacement vane motor

Key Technical Advantages

1. Patented Cartridge & 12-Vane Design: Advanced cam-ring profile and dual torque cycles per revolution minimize torque ripple (typically ~1.5%), ensuring smooth output even at low speeds while achieving very low noise levels across the entire speed range.
2. High Volumetric Efficiency & Pressure Capability: Optimized for harsh conditions, supporting intermittent pressures up to 320 bar. Maintains stable performance over time even with low-lubricity fluids and delivers high starting torque without pressure overshoots or instantaneous power spikes.
3. Internal Drain & Anti-Cavitation Features: The M5BF1 internal-drain configuration simplifies the hydraulic circuit. Unidirectional versions incorporate an integrated check valve that enables smooth dynamic braking and eliminates cavitation risk, enhancing system reliability and service life.
4. Robust Bearing & Shaft System: High-capacity double ball bearings support substantial radial and axial loads. The stiff taper keyed shaft allows direct mounting of fan blades, pulleys, or chain drives in compact, high-vibration installations.
5. True Interchangeability & Serviceability: Completely interchangeable rotating groups enable rapid cartridge replacement for different displacements or worn components, significantly reducing downtime and maintenance costs.

Application Areas

• Cooling fan drives on construction and agricultural machinery
• Compressor, mixer, and shredder drives in industrial hydraulic systems
• Mobile equipment generator sets and hydraulic cooling packages
• Paper, metallurgy, and other fixed installations requiring high starting torque and low noise
• Any high-pressure, high-speed hydraulic drive application needing direct shaft mounting

Expert Maintenance Tips

1. Ensure clean, properly aligned flange faces during installation. Use a castle nut and cotter pin at the specified torque on the taper shaft (mandatory for clockwise and bi-rotational service) to prevent loosening.
2. Use anti-wear mineral oil of appropriate viscosity (refer to official Parker Denison recommendations for operating range). Maintain system cleanliness at ISO 18/16/13 or better; thoroughly bleed air before initial start-up.
3. Internal-drain models have no external case drain—verify free return flow to prevent excessive case pressure. Periodically inspect bearings and seals; respect radial load limits (approx. 8000 N for cylindrical shafts, 5500 N for taper shafts).
4. Prefer complete cartridge-group replacement rather than individual vanes to preserve alignment and efficiency. Store long-term units in a dry, corrosion-protected environment and rotate the shaft periodically.