MCV116G4201 Danfoss Pressure Control Pilot

Product Overview

The Danfoss MCV116G4201 is a Type 4 Pressure Control Pilot (PCP) used as the pilot stage of Danfoss Series 90 electro-hydraulic displacement-control systems.

Danfoss PowerSource identifies the exact component as:

PCP, IV, DUAL, MS CONN, 1.15 SF, .003 NULL GAP

The designation identifies a Type 4, dual-coil PCP with an MS connector, a 1.15 psi/mA scale factor, and a 0.003 in null-gap configuration. (danfoss.com)

Danfoss’s Series 90 parts documentation further identifies MCV116G4201 as PCP, MS connector, dual coil for the KA control configuration. The same PCP part number appears in official Series 90 parts documentation for 42 cc, 55 cc, 75 cc, 100 cc and 130 cc pump configurations. (assets.danfoss.com)

The MCV116 is not a conventional directional solenoid valve. It is a torque-motor-actuated double-nozzle flapper valve that converts DC input current into a proportional differential hydraulic pressure signal. The resulting differential pressure controls the second stage of the Series 90 EDC system, which then drives the pump servo mechanism and changes swashplate angle. (danfoss.com)

The complete control chain is:

Electrical Current → MCV116 PCP → Differential Pilot Pressure → EDC Second Stage → Servo Cylinders → Swashplate

This makes MCV116G4201 a critical control component for electrohydraulic displacement regulation of Series 90 variable-displacement pumps.

Technical Specifications

MCV116G4201

• Model: MCV116G4201
• Brand: Danfoss
• Product Family: MCV116 Pressure Control Pilot
• Valve Type: Pressure Control Pilot (PCP)
• Type: Type 4
• Coil Configuration: Dual Coil
• Electrical Connector: MS Connector
• Scale Factor: 1.15 psi/mA ±0.1 psi/mA, approximately 0.079 bar/mA ±0.007 bar/mA
• Typical Supply Pressure: 350 psi / 24.1 bar
• PCP Pressure Range in Series 90 KVEB Application: 60–80 psi
• Test Current: ±85 mA
• Saturation Current: 250 mA / 125 mA, depending on individual-coil or series-coil configuration
• Minimum Differential Output Range: ±160 psi / ±11.0 bar
• Typical Null as Shipped: 0.1 ±0.138 bar / 1.5 ±2 psi for G42XX
• Pressure Null Shift: <±1.5%
• Temperature Null Shift: approximately ±0.21 bar / ±3 psi
• C1/C2 Null Pressure: 3.5–4.1 bar / 60–80 psi
• Internal Leakage: <3.44 L/min / <3.5 ci/s
• Load Flow: >0.57 L/min / >0.04 GPM
• Load Pressure Droop Slope: >0.04 L/min/bar
• Hysteresis: <7%
• Symmetry: <10%
• Linearity: <3%
• Threshold: <1 mA
• Resonant Frequency: >300 Hz
• Frequency Response with Current Driver: 150 Hz
• Maximum Voltage: 6 V for G42XX
• Maximum Current: 375 mA for the applicable individual-coil configuration
• Null Gap: 0.003 in
• Pump Application: Danfoss Series 90 EDC / KA control
• Displacement: Not applicable to the PCP itself
• Rated Rotational Speed: Not applicable to the PCP itself
• OEM Net Weight: Not published on the current Danfoss PowerSource page; therefore no unverified weight is presented as an OEM specification. (danfoss.com)

Official Series 90 Application

Danfoss’s current parts documentation confirms MCV116G4201 as a PCP, MS connector, dual-coil component for the KA control arrangement across multiple Series 90 pump displacements, including:

• 42 cc
• 55 cc
• 75 cc
• 100 cc
• 130 cc

(assets.danfoss.com)

The Series 90 100 cc parts manual also lists:

M9 → MCV116G4201 → PCP, MS connector, dual coil

which confirms the component’s position inside the Series 90 pump control assembly. (pvglobal.com.sg)

MCV116 Operating Principle

The MCV116 PCP is a single-stage closed-loop pressure-control valve.

Its main elements include:

• Torque motor
• Armature
• Double-nozzle flapper
• Hydraulic bridge
• Pressure feedback
• Centering springs
• C1/C2 control ports

At null, the flapper is centered between two nozzles. As the input current changes, torque-motor force moves the armature/flapper, changing the hydraulic bridge ratio and generating a differential pressure between C1 and C2.

Internal hydraulic pressure feedback then acts against the torque-motor output until equilibrium is reached. The resulting differential pressure is therefore proportional to command current. (danfoss.com)

This internal feedback mechanism is what allows MCV116G4201 to operate as a pressure-control pilot rather than a simple open-loop proportional solenoid.

Key Technical Advantages

Torque-Motor Double-Nozzle Flapper Technology

MCV116G4201 uses torque-motor actuation and a double-nozzle flapper hydraulic bridge. This architecture converts electrical current into a proportional differential hydraulic-pressure command. (danfoss.com)

1.15 psi/mA Scale Factor

The G42XX configuration provides approximately:

1.15 psi/mA ±0.1 psi/mA

or:

0.079 bar/mA ±0.007 bar/mA

This is one of the key identification and diagnostic parameters for MCV116G4201. (danfoss.com)

±160 psi Differential Output Range

The documented G42XX minimum output range is approximately ±160 psi / ±11.0 bar, providing sufficient pilot-pressure differential for the downstream Series 90 EDC stage. (danfoss.com)

<7% Hysteresis and <3% Linearity

The published G42XX specifications include:

• Hysteresis: <7%
• Linearity: <3%
• Symmetry: <10%
• Threshold: <1 mA

These parameters affect how consistently the electrical command translates into pump displacement. (danfoss.com)

>300 Hz Resonant Frequency

The G42XX configuration is specified with a resonant frequency above 300 Hz, while the documented frequency response using a current driver is 150 Hz. This supports dynamic electrohydraulic control rather than slow pressure-regulation-only applications. (danfoss.com)

Dual-Coil Control Architecture

Danfoss identifies MCV116G4201 as a dual-coil PCP. The company specifically warns that magnetic flux in a dual-coil PCP passes through both windings, which differs from many conventional proportional solenoid actuators with independent magnetic circuits. (danfoss.com)

Closed-Loop Pump Displacement Control

MCV116G4201 works with the Series 90 EDC second stage, servo mechanism and mechanical feedback linkage to create the complete displacement-control loop. Danfoss parts manuals list the PCP together with feedback links, filters, gaskets and control seal kits. (assets.danfoss.com)

Multi-Displacement Series 90 Application

The official parts documentation confirms MCV116G4201 in Series 90 42, 55, 75, 100 and 130 cc pump control configurations. (assets.danfoss.com)

Application Areas

Danfoss Series 90 Variable-Displacement Pumps

Typical applications include:

• Series 90 42 cc pumps
• Series 90 55 cc pumps
• Series 90 75 cc pumps
• Series 90 100 cc pumps
• Series 90 130 cc pumps
• KA control configurations
• KVEB electrical displacement control systems

Machine-level applications include:

• Construction equipment
• Excavators
• Wheel loaders
• Agricultural machinery
• Forestry equipment
• Material-handling machinery
• Mining equipment
• Marine hydraulic equipment
• Industrial mobile hydraulics

The original MCV116 technical documentation specifically identifies construction, farming, material handling, marine, mining and industrial applications. (danfoss.com)

Expert Maintenance Tips

Do Not Treat MCV116G4201 as a Conventional Proportional Solenoid Valve

MCV116G4201 is a pressure-control pilot. Its output is differential hydraulic pressure, which controls the downstream EDC stage.

Troubleshooting should therefore follow:

Current → Differential Pressure → EDC Spool → Servo Pressure → Swashplate

rather than simply checking whether the coil switches.

Do Not Arbitrarily Adjust PCP Null

Danfoss documentation states that when the MCV116 PCP is used as the first stage of electrical displacement control, the PCP null should not be adjusted casually. Neutral adjustment should be made at the appropriate second-stage valve according to the EDC service procedure. (danfoss.com)

Use the Correct Dual-Coil Drive Strategy

Danfoss specifically warns that dual-coil PCPs have magnetic flux passing through both windings. Therefore, verify:

• Coil wiring
• Series/parallel topology
• Current-driver design
• Current polarity
• Maximum current
• Controller architecture

before replacing or redesigning the electronic driver. (danfoss.com)

Verify PCP Supply Pressure

The G42XX configuration specifies a typical supply pressure of 350 psi / 24.1 bar, while the Series 90 KVEB application documentation lists a 60–80 psi PCP pressure range for MCV116G4201. These figures represent different defined parameters and should not be interpreted as one single rated pressure value. (danfoss.com)

Inspect the PCP Filter

The Series 90 parts manual lists K08572 Filter Assembly as a service component associated with MCV116G4201. Pilot-circuit contamination should therefore be considered whenever stroking response or neutral performance becomes abnormal. (assets.danfoss.com)

Transfer the Correct Orifices During Control Replacement

Danfoss explicitly instructs technicians to transfer all orifices present in the original control when installing a replacement control. Any pre-installed orifices in the replacement control should be removed before transferring the original orifices. (assets.danfoss.com)

Inspect Feedback Linkage

A correctly operating PCP does not guarantee correct pump displacement. Inspect:

• Feedback link
• EDC spool
• Neutral adjustment
• Servo mechanism
• Swashplate
• Mechanical linkage

The Series 90 parts manual explicitly lists feedback-link components alongside MCV116G4201. (assets.danfoss.com)

Maintain Clean Pilot Oil

The MCV116 relies on small hydraulic nozzles, orifices and pressure-feedback passages. Contamination can cause:

• Nozzle restriction
• Unstable differential pressure
• Slow response
• Null drift
• Increased hysteresis
• Servo instability

Pilot-oil cleanliness is therefore essential.

Diagnose With Current-to-Pressure Testing

A practical diagnostic method is:

Input Current → C1/C2 Differential Pressure

The G42XX scale factor is approximately 1.15 psi/mA. Deviations from the expected current-to-pressure relationship can help identify problems in the torque motor, flapper/nozzle assembly, pressure feedback or hydraulic contamination. (danfoss.com)

Perform Complete EDC Dynamic Testing

A professional replacement test should reproduce:

Current Source → MCV116G4201 → C1/C2 Differential Pressure → EDC Second Stage → Servo Cylinder → Swashplate

Recommended measurements include:

• Null
• Positive command
• Negative command
• Differential pressure
• Pressure symmetry
• Hysteresis
• Linearity
• Threshold
• Dynamic response
• Repeated cycling
• Neutral return

This is substantially more meaningful than a simple coil-resistance or continuity check.