Product Overview
The M4C-024-1N00-A102 and M4SD-113-3N00-A102 are flagship models in the Parker Denison M4 Series of fixed-displacement high-performance vane motors. Engineered for severe-duty applications, the M4C-024 delivers 24.4 cm³/rev displacement with a maximum operating pressure of 175 bar and a rated speed of 4000 RPM, while the M4SD-113 provides 116.7 cm³/rev for heavy-load drive requirements.
Both models feature drop-in interchangeability — mounting flanges, port threads, and shaft dimensions match the original Parker Denison specification exactly, enabling direct replacement without pipework or flange modification. Every unit undergoes 100% simulated-condition testing prior to shipment, including pressure hold, volumetric efficiency, torque output, and internal leakage verification.
Technical Specifications
M4C-024-1N00-A102:
Model Series: M4C (Medium-Duty Vane Motor)
Displacement: 24.4 cm³/rev
Maximum Operating Pressure: 175 bar (intermittent up to 230 bar)
Rated Speed: 4000 RPM
Torque Rating: 198 Nm at 175 bar
Direction of Rotation: Bi-directional
Shaft Type: Keyed (SAE B)
Flange Size: SAE B, 2-bolt
Port Connection Inlet: 1″ SAE 3000 – UNC thread
Drain Option: Internal
Material – Seals: Buna-N
Brand: Denison
M4SD-113-3N00-A102:
Model Series: M4SD (Severe-Duty Vane Motor)
Displacement: 116.7 cm³/rev
Maximum Operating Pressure: 175 bar (M4SD series up to 235 bar)
Maximum Speed: 3000 RPM
Input Flow at 2000 RPM: 233.0 L/min
Mounting Interface: SAE-B 2-bolt J744c
Direction of Rotation: Bi-directional
Brand: Denison
Key Technical Advantages
1. Pressure-Balanced Vane Cartridge Design
The vane, rotor, and cam ring are hydraulically balanced under operating pressure, minimizing contact stress on critical kinematic pairs. This architecture maintains high volumetric efficiency across the full speed range while substantially extending bearing and vane service life.
2. Low Torque Ripple at Low Speed
In low-speed, high-load applications such as swing drives and load hoist systems, the vane motor exhibits exceptionally low torque ripple, ensuring smooth load handling without stick-slip or shock loading.
3. High Starting Torque Efficiency
The motor’s high starting torque efficiency enables direct startup under full load without pressure overshoots, jerks, or high instantaneous horsepower demands — an ideal characteristic for hydraulic systems requiring frequent start-stop and directional changes.
4. Cast Iron Housing with Precision Machining
The housing is manufactured from high-strength cast iron, with internal cam ring surfaces machined to micron-level tolerances. This precision directly determines volumetric efficiency and service life, and forms the dimensional foundation for true drop-in interchangeability.
Application Areas
Lifting & Winch Drives: Marine winches, crane hoisting mechanisms
Swing Drive Systems: Excavator and port machinery swing platforms
Marine Propulsion & Anchor Handling: Fishing trawler winches, ship windlasses, propulsion drives
Travel Drives: Track and wheel drive systems for construction machinery
Industrial Hydraulic Systems: Medium-to-high pressure circuits requiring frequent direction changes and high reliability
Expert Maintenance Tips
Pre-Installation Fluid Cleanliness Verification: M4 Series vane motors are sensitive to fluid contamination. Confirm system fluid cleanliness reaches ISO 4406 18/16/13 or better before installation. Particulate contamination accelerates vane-to-cam-ring wear and rapidly degrades volumetric efficiency.
First-Start Air Bleeding Procedure: After initial installation or extended shutdown, run the motor at low pressure (30–50 bar) under no load for 2–3 minutes, allowing air to escape through the case drain port. This prevents dry friction damage to the vanes.
Drain Line Back-Pressure Control: M4C models use internal drainage. Ensure the case drain return line maintains back-pressure below 0.5 bar. Excessive back-pressure will cause shaft seal failure and housing overheating.
Periodic Volumetric Efficiency Monitoring: Test volumetric efficiency every 2000 operating hours. When efficiency drops below 85% of the factory baseline, inspect vane and cam ring wear and replace the vane cartridge assembly.
