104-3497-006 Danfoss Char-Lynn Orbit Motor

Product Overview

The 104-3497-006, 104-1533-006 and 104-3498-006 are Danfoss Char-Lynn 2000 Series low-speed, high-torque orbital hydraulic motors using a disc valve with valve drive and a Geroler orbital gearwheel set.

Danfoss PowerSource provides exact configuration data for these part numbers, including displacement, mounting interface, shaft geometry, porting, bearings, seals, check-valve configuration and optional speed sensing.

The 2000 Series documentation also emphasizes correct case-pressure management. An external case drain can improve heat removal, reduce case pressure and protect the shaft seal when required by the operating condition.

For aftermarket applications, the technically correct positioning is Danfoss Char-Lynn replacement / compatible replacement / interchangeable replacement motor. Any direct interchangeability claim should be based on complete mechanical and hydraulic verification.

Technical Specifications

104-3497-006

• Model: 104-3497-006
• Brand: Danfoss
• Sub-brand: Char-Lynn
• Product family: 2000 Series
• Motor size: 195
• Geometric displacement: 194.8 cm³/rev / 11.89 in³/rev
• Valve system: Disc valve with valve drive
• Orbital gearwheel: Geroler
• Motor type: Standard
• Mounting: 2-Bolt SAE A
• Pilot diameter: 82.6 mm / 3.25 in
• Bolt circle: 106.4 mm / 4.19 in
• Mounting hole: 13.6 mm / 0.54 in
• Shaft: Straight
• Shaft diameter: 32 mm
• Shaft-end thread: 1/4-20 UNC-2B
• Shaft key: 1/4 × 1 in Woodruff key
• Main ports: 7/8-14 UNF-2B SAE O-ring
• Main port configuration: Side port, staggered
• Case drain: 7/16-20 UNF-2B SAE O-ring
• Front bearing: Tapered roller bearing
• Rear bearing: Tapered roller bearing
• Shaft seal: NBR standard
• Dust seal: Standard
• Check valve: Yes
• Hydraulic valve function: None
• Speed sensor: Hall effect, 30 pulses, M12 connector
• Approx. dimensions: 228.6 × 131.1 × 110.0 mm
• Product weight: 23 lb / approx. 10.4 kg

Additional exact-part-number performance data:

• Maximum speed: 385 rpm
• Flow rate: 75 L/min
• Maximum intermittent pressure: 260 bar
• Published torque: approx. 540 N·m

The current Danfoss PowerSource product page does not separately publish a continuous rated pressure for this exact part number, so 260 bar should be described as maximum intermittent pressure, not continuous rated pressure.

104-1533-006

• Model: 104-1533-006
• Brand: Danfoss
• Sub-brand: Char-Lynn
• Product family: 2000 Series
• Motor size: 245
• Geometric displacement: 244.3 cm³/rev / 14.91 in³/rev
• Valve system: Disc valve with valve drive
• Orbital gearwheel: Geroler
• Mounting: 2-Bolt SAE A
• Pilot diameter: 82.6 mm / 3.25 in
• Bolt circle: 106.4 mm / 4.19 in
• Mounting hole: 13.6 mm / 0.54 in
• Shaft: Straight
• Shaft diameter: 32 mm
• Shaft-end thread: 1/4-20 UNC-2B
• Shaft key: 1/4 × 1 in Woodruff key
• Main ports: 7/8-14 UNF-2B SAE O-ring
• Case drain: 7/16-20 UNF-2B SAE O-ring
• Front and rear bearings: Tapered roller bearings
• Shaft seal: NBR standard
• Check valve: Yes
• Speed sensor: None
• Approx. dimensions: 237.7 × 131.1 × 110.0 mm
• Product weight: 25 lb / approx. 11.3 kg

Exact-part-number performance data:

• Maximum speed: 308 rpm
• Flow rate: 75 L/min
• Maximum intermittent pressure: 260 bar
• Published torque: approx. 660 N·m

104-3498-006

• Model: 104-3498-006
• Brand: Danfoss
• Sub-brand: Char-Lynn
• Product family: 2000 Series
• Motor size: 245
• Geometric displacement: 244.3 cm³/rev / 14.91 in³/rev
• Valve system: Disc valve with valve drive
• Orbital gearwheel: Geroler
• Mounting: 2-Bolt SAE A
• Pilot diameter: 82.6 mm / 3.25 in
• Bolt circle: 106.4 mm / 4.19 in
• Mounting hole: 13.6 mm / 0.54 in
• Shaft: Straight
• Shaft diameter: 32 mm
• Shaft-end thread: 1/4-20 UNC-2B
• Shaft key: 1/4 × 1 in Woodruff key
• Main ports: 7/8-14 UNF-2B SAE O-ring
• Case drain: 7/16-20 UNF-2B SAE O-ring
• Front and rear bearings: Tapered roller bearings
• Shaft seal: NBR standard
• Dust seal: Standard
• Check valve: Yes
• Speed sensor: Hall effect, 30 pulses, M12 connector
• Approx. dimensions: 237.7 × 131.1 × 110.0 mm
• Product weight: 25 lb / approx. 11.3 kg

Exact-part-number performance data:

• Maximum speed: 308 rpm
• Flow rate: 75 L/min
• Maximum intermittent pressure: 260 bar
• Published torque: approx. 660 N·m

101 / 104 / 106 Series Clarification

The supplied title also contains 101, 104 and 106 series references.

• 104: the supplied 104-3497-006, 104-1533-006 and 104-3498-006 are confirmed Danfoss Char-Lynn 2000 Series motors.
• 106: Danfoss confirms 106-1012-006 as a 2000 Series bearingless/short motor, with 194.8 cm³/rev displacement and no output shaft or bearing arrangement.
• 101: the supplied title does not contain a complete 101-series part number, so a specific displacement, pressure, speed or weight should not be assigned to it without the complete part number.

This distinction should be preserved on an SEO product page because the series numbers alone do not identify a complete interchangeable configuration.

Control Configuration

• Motor type: Fixed-displacement LSHT orbital hydraulic motor
• Displacement control: Fixed displacement
• Speed control: Hydraulic flow control
• Direction control: A/B hydraulic port pressure
• Hydraulic distribution: Disc valve
• Orbital gear system: Geroler
• 104-3497-006: Hall-effect speed sensor, 30 pulses, M12 connector
• 104-1533-006: No sensor
• 104-3498-006: Hall-effect speed sensor, 30 pulses, M12 connector

Key Technical Advantages

Geroler Orbital Gearwheel

Danfoss specifies a Geroler orbital gearwheel set for these 2000 Series motors. The orbital gear architecture is intended for low-speed, high-torque hydraulic transmission and controlled bidirectional output.

Disc Valve Distribution

The disc valve with valve drive provides the hydraulic commutation required to convert pressure and flow into continuous rotary output. It is a defining architectural feature of the Char-Lynn 2000 Series.

Tapered Roller Bearings

The exact 104-series configurations use front and rear tapered roller bearings. These bearings are suitable for applications requiring controlled radial and axial load support, although the allowable external load must still be checked for the actual mounting and shaft loading condition.

Standard NBR Shaft Seal

The exact Danfoss configurations specify NBR standard shaft seals. Seal selection should remain compatible with hydraulic-fluid type, temperature and pressure conditions during replacement or overhaul.

Hall-Effect Speed Feedback

The 104-3497-006 and 104-3498-006 configurations include a 30-pulse Hall-effect speed sensor with M12 connection. This allows the motor to provide speed feedback to a control or monitoring system.

Compact SAE A Installation

The 104-3497-006, 104-1533-006 and 104-3498-006 configurations use a 2-Bolt SAE A mounting interface with a 3.25-inch pilot and 4.19-inch bolt circle, supporting replacement engineering where the original installation geometry must be retained.

Case-Pressure Management

Danfoss 2000 Series documentation emphasizes that motor life is affected by case pressure. A properly designed case drain can remove heat, control internal pressure and protect the shaft seal where the operating condition requires it.

Application Areas

Typical applications include:

• Swing drives
• Brush cutters
• Mowers
• Harvesting equipment
• Agricultural machinery
• Mobile hydraulic machinery
• Conveyors
• Rotary drives
• Material-handling machinery
• Industrial auxiliary drives

The exact product listings specifically reference swing motors, brush cutters & mowers, and harvesting equipment.

Expert Maintenance Tips

Hydraulic Cleanliness and Viscosity

Danfoss filtration and viscosity guidance identifies 70 SUS / 13 cSt as the minimum viscosity for the applicable Char-Lynn disc-valve motor group, with a recommended viscosity range of 100–200 SUS / 20–43 cSt and a cleanliness target of ISO 20/18/13.

Monitor Case Pressure

Do not evaluate the motor only from A/B main-line pressure. Case pressure must also remain within the shaft-seal limitation. Excessive case pressure can shorten motor life and damage the seal system.

Verify the SAE A Interface

For 104-3497-006, 104-1533-006 and 104-3498-006, verify:

• 3.25-inch pilot
• 4.19-inch bolt circle
• 0.54-inch mounting holes
• 7/8-14 SAE O-ring main ports
• 7/16-20 SAE O-ring case drain
• 32 mm shaft
• Woodruff key

Matching displacement alone is not sufficient for a true drop-in replacement.

Check the Speed-Sensor Configuration

For 104-3497-006 and 104-3498-006, the speed sensor is part of the documented configuration. Removing it during replacement may affect the machine’s control system even when the mechanical installation is correct.

Replace Seals During Overhaul

Replace removed shaft seals, O-rings and dust seals during service rather than reusing them. Inspect the shaft, bearings, Geroler set and valve/commutation components for abnormal wear.

Perform 100% Simulated Working-Condition Testing

For an aftermarket replacement motor, a practical final test program should include:

• No-load startup
• Forward and reverse rotation
• Low-speed stability
• Flow response
• Differential-pressure response
• External leakage inspection
• Case-drain condition
• Hall-sensor output for sensor-equipped configurations

This provides a strong technical basis for your 100% Simulated Working-Condition Testing claim.

Technical Verification Note

The most reliable data available for the three exact supplied part numbers are:

• 104-3497-006: 194.8 cm³/rev, 385 rpm, 75 L/min, 260 bar maximum intermittent pressure, approx. 540 N·m torque.
• 104-1533-006: 244.3 cm³/rev, 308 rpm, 75 L/min, 260 bar maximum intermittent pressure, approx. 660 N·m torque.
• 104-3498-006: 244.3 cm³/rev, 308 rpm, 75 L/min, 260 bar maximum intermittent pressure, approx. 660 N·m torque.

Danfoss’s current official PowerSource pages are the primary source for the exact configuration and part-number structure; the operating speed/flow/torque figures above are additionally cross-checked against exact-part-number distributor technical data. Where the current official page does not expose a continuous pressure rating, this copy deliberately avoids inventing one.