MCV105C3022 Danfoss EDC M46 Pump Controller Kit Solenoid

Product Overview

The MCV105C3022 is a Danfoss (formerly Sauer-Danfoss) MCV105C Series Electrical Displacement Control (EDC) designed as a two-stage electrohydraulic pump stroke control for 46 cc Medium Duty pumps. It uses mechanical feedback to achieve closed-loop control of the swashplate angle. The first stage is an MCV116A torque-motor-actuated double-nozzle flapper valve that generates differential pressure proportional to the electrical input signal. The second stage utilizes this differential pressure to actuate a dual-spool/rotary spool arrangement that ports oil to the pump servo pistons. Fully interchangeable with previous MCV105B units, every valve undergoes 100% simulated operating-condition testing to deliver precise, safe and reliable displacement control in high-pressure hydrostatic systems.

Technical Specifications

• Model: MCV105C3022 (MCV105C SERIES)
• Type: Electrical Displacement Control (EDC) / EDC-M46 Pump Controller Kit
• Compatible pumps: Danfoss / Sauer-Danfoss 46 cc Medium Duty pumps (Series 40 M46)
• Control principle: Two-stage electrohydraulic with mechanical feedback closed-loop swashplate control
• First stage: MCV116A torque-motor driven double-nozzle flapper valve
• Second stage: Dual-spool / rotary spool configuration with null deadband for safety
• Coil options: Single-coil or dual-coil torque motor
• Typical threshold current (examples): approx. 6.25 ± 0.75 mA (single coil, 643 Ω); 11.5–23 mA range for other configurations
• Connector: Standard Packard (alternative options available)
• Environmental protection: Silicone-oil-filled torque motor (anti-condensation), fully sealed stage interface
• Direct replacement: MCV105B
• Mounting: Factory-installed on pump or as standalone control unit

Key Technical Advantages:

1. Closed-loop mechanical feedback: Precise swashplate angle control with independent null deadband, combining machine safety with high dynamic response.
2. Two-stage electrohydraulic precision: High-accuracy differential pressure from the torque-motor flapper stage combined with optimized rotary spool metering for low hysteresis and accurate flow distribution.
3. Full interchangeability and durability: Exact interface compatibility with M46 pumps allows drop-in replacement; silicone-oil filling and environmental sealing enhance resistance to moisture, vibration and contamination.
4. Flexible electrical configuration: Single or dual coil options support single-source, dual-source algebraic summation or redundant command strategies.
5. 100% factory validation: Every unit is tested under simulated conditions to guarantee stable displacement control and low leakage under high-pressure and varying duty cycles.

Application Areas

• Hydrostatic transmissions in construction machinery (excavators, loaders, rollers)
• Closed-circuit pump control on agricultural and forestry equipment
• Proportional displacement regulation on material-handling and industrial vehicles
• Medium-power hydraulic systems requiring remote or automatic closed-loop control
• OEM service and aftermarket replacement of M46 pump EDC assemblies

Expert Maintenance Tips

1. Thoroughly clean the pump mounting face and fluid passages before installation; verify O-rings are intact and correctly seated to maintain differential-pressure integrity.
2. Match the drive signal to the coil resistance and threshold current; a PWM signal (typically 100–200 Hz) is recommended for optimum dynamic performance.
3. Periodically inspect the torque-motor cavity seal and silicone-oil condition to prevent condensation or contamination from entering the first-stage nozzle-flapper assembly.
4. When replacing, use genuine or equivalent MCV105C series units to ensure mechanical feedback and second-stage spool stroke remain matched, avoiding abnormal swashplate response.
5. During commissioning, apply low current first to confirm null deadband and direction, then ramp to full displacement while monitoring servo pressure and pump output flow for linear tracking.