Danfoss Series 51 160cc Variable Displacement Motors Parts Manual

Product Overview

The Danfoss Series 51 160cc Variable Displacement Motor is a high-performance hydraulic component designed for demanding applications. This manual provides essential information for identifying parts, performing repairs, and executing conversions on these units.

Service Parts Identification

The modular design of the Series 51 motor simplifies the identification of service parts. Each unit features a nameplate on the housing containing the model code, material number, and serial number. These identifiers are critical for ordering the correct replacement parts. The serial number specifically indicates the location of manufacture, the year and week of production, and a unique sequence number.

Ordering and Maintenance

When ordering parts, users must reference the specific model code and date code found on the unit's nameplate. The manual includes extensive configuration tables for various hardware, endcaps, controls, and servo supply options. Users are advised to consult the included service bulletins before ordering, as these documents contain vital information regarding part interchangeability, updates, and specific repair procedures.

Technical Configuration

The manual provides detailed exploded-view diagrams and corresponding parts lists for various configurations, including:

• Special Hardware: Cartridge, DIN, and SAE flange configurations.
• Endcaps: Various axial and side port configurations.
• Controls: Electric proportional, hydraulic proportional, and 2-position control options.
• Servo Supply and Loop Flushing: Detailed components for servo pressure supply and loop flushing systems.
• Output Shafts: Specifications for different spline configurations.

Safety and Service

Proper maintenance is essential for the longevity and safe operation of the motor. The manual outlines procedures for minor and major repairs. Users should always refer to the latest service bulletins to ensure they are using the most current parts and procedures, as some older components have been rendered obsolete by design improvements. All repairs should be performed by qualified personnel following standard hydraulic safety practices.