90M100NC0N7N0C7W00NNN0000F3 Sauer Danfoss Motor 100cc

Product Overview

The 90M100NC0N7N0C7W00NNN0000F3 is a closed-circuit axial piston variable displacement motor built on the Sauer Danfoss Series 90 (90M series) platform, in the 90M100 displacement size (100 cm³/rev). The motor features a swash plate variable design with hydraulic pilot variable control, specifically engineered for medium-power drive applications in closed-circuit hydrostatic transmission systems. This model serves as an original equipment motor in the travel drive system of the New Holland AL59 combine harvester, with part number N194103670 and MAT No. 312231.

The 90M series is the swash plate axial piston motor series within the Sauer Danfoss Series 90 platform, covering six displacement sizes: 030, 042, 055, 075, 100, and 130. Series 90 pumps/motors employ a parallel axial piston/slipper design in conjunction with a fixed or tilting swash plate, delivering efficient and reliable hydraulic power transmission. It is an industry-standard platform for closed-circuit applications. The 90M100 offers a maximum displacement of 100 cm³/rev, maximum working pressure of 420 bar, peak pressure of 480 bar, rated speed of 3,300 rpm, maximum speed of 3,650 rpm, theoretical torque of approximately 0.48 Nm/bar (approximately 480 Nm at 300 bar), and a weight of approximately 34 kg.

The model code 90M100NC0N7N0C7W00NNN0000F3 follows the Sauer Danfoss Series 90 standard coding system: 90M100 is the series displacement code (swash plate variable motor, 100 cm³/rev), NC is the control method code (hydraulic pilot variable control), 0N7 is the control option and pressure setting code, 0C7 is the port configuration code, W00 is the shaft and rotation direction code, and NNN0000F3 is the standard tail code. The motor features a closed-circuit design with bi-directional rotation, achieving stepless displacement adjustment through swash plate angle variation.

Engineered as a form-fit-function replacement for original Sauer Danfoss 90M100 series motors, this model maintains identical mounting flange dimensions (SAE C flange or cartridge), shaft specifications (splined/tapered/straight key optional), and port locations, enabling drop-in interchangeability without modification to the host machine’s mounting interface or hydraulic circuit. Each unit undergoes 100% simulated load testing prior to shipment, validating output torque and volumetric efficiency against original specifications.

Technical Specifications

• Model: 90M100NC0N7N0C7W00NNN0000F3

• Original Part Number: N194103670 (New Holland system)

• Series: Sauer Danfoss Series 90 (90M series swash plate variable motor)

• Motor Type: Closed-circuit axial piston variable displacement motor

• Design Feature: Swash plate configuration, parallel axial piston/slipper arrangement, stepless variable

• Maximum Displacement: 100 cm³/rev (6.10 in³/rev)

• Minimum Displacement (MV): Approx. 26 cm³/rev (3.8:1 displacement ratio)

• Maximum Working Pressure: 420 bar (42 MPa / 6,090 psi)

• Peak Pressure: 480 bar (48 MPa / 6,961 psi)

• Rated Speed (max displacement): 3,300 rpm

• Maximum Speed (max displacement): 3,650 rpm

• Minimum Speed: 500 rpm

• Theoretical Torque: Approx. 0.48 Nm/bar (approx. 480 Nm at 300 bar)

• Rotation: Bi-directional

• Mounting: SAE C flange or cartridge

• Shaft Type: Splined / Tapered / Straight key (optional)

• Port Connections: Twin / Axial (optional)

• Seal Material: FKM

• Housing Material: Cast iron

• Weight (approx.): 34 kg (75 lb)

• Built-in Feature: Standard loop flushing valve

• Optional Features: Speed sensor, displacement limiter

• Circuit: Closed circuit

Data Limitation Note: The displacement ratio (max/min) and precise theoretical torque values for the 90M100 are sourced from authorized distributor and third-party technical platforms. It is recommended to obtain the complete technical manual from Sauer Danfoss or an authorized dealer for final confirmation.

Key Technical Advantages

1. Swash Plate Variable Design with Stepless Speed Regulation

The 90M100NC0N7N0C7W00NNN0000F3 employs the classic swash plate design of the Sauer Danfoss Series 90 platform, with parallel axial piston/slipper arrangement and a tilting swash plate achieving stepless displacement adjustment. At full displacement, the motor delivers a maximum torque of approximately 480 Nm (at 300 bar), suitable for heavy-load starting and climbing conditions in harvester travel drives; as the swash plate angle decreases, displacement reduces and speed increases for high-speed travel requirements. The variable control mechanism is driven by hydraulic pilot signals, offering high response frequency and control precision for coordinated control with the machine ECU.

2. Closed-Circuit Optimization with Built-in Loop Flushing

The Series 90 platform is specifically designed for closed-circuit hydrostatic transmissions. The 90M100 motor can be paired with Series 90 variable pumps (such as the 90R100) to form a complete closed-circuit hydrostatic drive system. The motor features a standard loop flushing valve, which directs a portion of hot oil from the working circuit to the case, returning it to the charge circuit after cooling and filtration, effectively controlling oil temperature in the closed circuit and extending the service life of hydraulic fluid and seals. This design gives the 90M100 excellent heat dissipation performance and reliability under continuous heavy-duty operating conditions such as combine harvesters.

3. High Power Density with Compact Construction

The 90M100 achieves a maximum working pressure of 420 bar and a rated speed of 3,300 rpm at a displacement of 100 cm³/rev, with a weight of only approximately 34 kg, offering an excellent power-to-weight ratio. The swash plate configuration provides a compact axial dimension, suitable for the space-constrained travel drive systems of combine harvesters. The Series 90 platform features a modular design, with different displacement sizes (030 to 130 cm³/rev) sharing mounting interfaces and control modules, enabling machine manufacturers to flexibly switch between displacement requirements.

4. Multi-Standard Mounting Compatibility with Machine Integration

The Series 90 motor’s mounting flange conforms to SAE J744 standards (SAE C flange or cartridge), with shaft options including splined, tapered, and straight key configurations, and port connections available in twin and axial configurations to suit different machine mounting requirements. The motor supports bi-directional rotation, with forward/reverse output shaft switching achieved by changing the swash plate direction, suitable for travel drive systems requiring frequent direction changes. The mature application of the 90M100 in the New Holland AL59 combine harvester validates its precise matching capability with the machine’s hydraulic system.

Application Areas

• Combine Harvesters: New Holland AL59 travel drive system (original equipment model), John Deere 7700/7720 harvesters, Claas Dominator 96/106 harvesters, Case IH 1640/1660 harvesters

• Telescopic Handlers: Merlo series telescopic handler hydrostatic transmission systems

• Road Rollers: Bomag BW161 AD, BW177 AD travel drives, Dynapac CA302, Ammann ASC150 rollers

• Forestry Machinery: Timberjack 1010B forwarder transmission systems

• Agricultural Machinery: Grape harvesters (Pellenc and other brands), other self-propelled agricultural machinery

• Construction Vehicles: Concrete mixer trucks (the 90M series has extensive applications in mixer truck drives)

Expert Maintenance Tips

1. Shaft Alignment Requirements: The swash plate motor’s swash plate and slipper pair are sensitive to radial forces. During installation, ensure the coaxiality deviation between the motor shaft and drive-end coupling does not exceed 0.05 mm. When installing a splined shaft, ensure the spline mating surfaces are free of burrs and damage; when installing a straight keyed shaft, ensure key-to-keyway fit clearances conform to standard requirements.

2. Case Pressure and Flushing Valve Management: When operating in closed circuits, the Series 90 motor’s case pressure must be maintained within specified limits. The drain port must be connected separately to the reservoir with back pressure not exceeding 1.7 bar (continuous) / 5.2 bar (maximum). Periodically inspect the flushing flow of the built-in loop flushing valve to ensure effective control of circuit oil temperature and cleanliness.

3. Hydraulic Fluid Cleanliness Control: Maintain hydraulic fluid cleanliness at ISO 18/15 or NAS Level 9 or better. Replace hydraulic fluid and filter elements every 1,000 operating hours or annually, with filter element filtration accuracy no less than 10 μm. Contaminant particles accelerate piston/slipper pair and swash plate surface wear, degrading volumetric efficiency.

4. Variable Control Mechanism Maintenance: Periodically verify the response characteristics of the hydraulic pilot variable control mechanism. Check control response linearity every 500 operating hours, confirming that displacement adjustment switching time from minimum to maximum is within specification. If response is sluggish or non-linear, check pilot circuit pressure and control valve spool wear.

5. Initial Startup and Extended Storage: Fill the motor housing with clean hydraulic fluid during initial installation to prevent dry friction on piston pairs during startup. For motors stored over 6 months, manually rotate the shaft 2–3 revolutions to confirm free rotation, then run at low pressure (10 MPa) under no load for 10 minutes, confirming normal case temperature and leakage before gradually applying load.