Software / Apps Services
Danfoss Series 90 100cc Axial Piston Pump Parts Manual
Comprehensive parts manual for the Danfoss Series 90 100cc Axial Piston Pump, including detailed component diagrams, part identification procedures, and service bulletin information.
Table of contents
Product Overview
The Danfoss Series 90 100cc Axial Piston Pump is a high-performance hydraulic component designed for demanding applications. This manual provides essential information for identifying, ordering, and replacing service parts to ensure the continued reliability and efficiency of your equipment.
Service Parts Identification
Each pump is equipped with a nameplate containing critical identification data, including the Model Code, Model/Material Number, and Serial Number. The model code is essential for ordering the correct service parts. The serial number identifies the manufacturing date and warranty period, with the first two digits indicating the year and the next two the calendar week of manufacture.
Ordering Parts
To identify a specific part, refer to the modular group diagrams and corresponding parts lists provided in this manual. When multiple configurations exist for a single item, use the date code from your unit's nameplate to select the correct part number. Some parts are region-specific; ensure you select the correct part number for your location (e.g., Germany vs. United States).
Service Bulletins
This manual includes important service bulletins that provide updates on part interchangeability, design improvements, and maintenance procedures. Always check for a Service Bulletin Number (SB-XXXX-XXX) listed next to a part name in the parts list before ordering. These bulletins contain critical information regarding the compatibility of new and old design components.
Maintenance and Repairs
The Series 90 pump features a modular design, simplifying the identification of parts for minor repairs, major repairs, or conversions. When performing maintenance, ensure that all components are handled according to the specified procedures. For example, when replacing pistons, they must be installed symmetrically in multiples of three. Always use the latest service kits and follow the guidelines provided in the included service bulletins to maintain optimal pump performance.
Technical Support
For further assistance, refer to the contact information for Danfoss Power Solutions provided at the end of this manual. Ensure that you have your unit's complete model code and serial number ready when contacting support to expedite the identification of your specific pump configuration.
Manufacturer information
Danfoss A/S
Practical help
Common problems
Interference between swashplate hold down bracket and speed sensor ring
Install the new hold down bracket designed to provide clearance for the speed sensor ring.
Bearing locator pin coming out of position
Use the updated, longer bearing locator pin (8801235) to increase engagement.
Displacement limiter screw threading into servo piston
Replace the old 'flat point' displacement limiter screw with the new 'dog nose' version.
Before use
- Verify the model code and serial number on the nameplate.
- Check the date code to ensure correct part selection.
- Review all applicable service bulletins for the specific unit.
- Ensure the correct regional part number is selected.
- Confirm the pump rotation (LH or RH) if required for the specific component.
Specs in practice
- Serial Number
- Identifies manufacture date (Year-Week) and unit sequence.
Images and diagrams
- Exploded views show the assembly order of components.
- Asterisks (*) indicate parts included in the base pump seal kit.
- Parentheses ( ) indicate parts not available individually.
- Specific views (e.g., View A) illustrate orifice locations and control configurations.
Model compatibility
- New style charge pump covers are rotation dependent (marked L or R).
- Piece parts for some assemblies are not interchangeable; replace as a complete kit.
- Always transfer existing orifices to replacement controls if pre-installed ones are not present.
- New style side cover inserts and guide posts must be used together.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.