Industrial / Pumps & Motors
Service Guide for Danfoss APP 11-22 High Pressure Pump
This service guide provides essential instructions for documenting claims and repair issues for Danfoss APP 11-22 high-pressure pumps, including required operational data and visual inspection points for key components.
Table of contents
Manual images
Click an image to enlargeQuick guide for claims and repairs
This document serves as a photo guide for documenting claims or repair issues for Danfoss APP 11-22 pumps. To ensure a smooth service process, it is critical to provide comprehensive information and photographs of all parts, not just those that appear damaged. Always include the specific pump identification details and operational conditions.
Required information for claim documentation
When submitting a claim or repair request, you must provide the following information:
- Pump product information: Pump type, Danfoss code number, and serial number.
- Operational conditions: Inlet pressure, outlet pressure, RPM, hours of operation, filtration (micron), flow, water temperature, and TDS (ppm).
- Additional details: Permeate flush status before shutdown, average number of starts per day, and VFD ramp up/down times if applicable.
- Fault description: A clear explanation of the system or component fault and any troubleshooting steps already taken.
Component inspection guide
The following components should be inspected and photographed for the service technician:
- Coupling: Check the coupling distance before disassembling.
- Shaft seal: Document the dynamic rubber bellow part, static part surface, and the dynamic part.
- Piston shoe and rod: Inspect the sliding face, back side, joint bearing, and the piston rod surface.
- Swash plate: Check the surface and the bearing inside the swash plate.
- Retainer ball and plate: Inspect the retainer guide ball, upper side of the plate, and the internal bearings.
- Port and valve plates: Document the upper side, close-ups, bearings, and thrust pads.
- Housing and cylinder barrel: Inspect the housing, outer surface of the cylinder barrel, inner bushings, and the pins and springs.
Contact information
For further assistance or to submit your claim, contact Danfoss High Pressure Pumps at danfoss.com or via email at [email protected]. You can also reach out by phone at +45 7488 2222.
Official resources from the manual
Manufacturer information
Danfoss A/S
Practical help
Common problems
Incomplete claim documentation
Ensure all operational conditions (pressure, RPM, flow, TDS) are recorded and provided in the claim form.
Missing photo evidence
Provide photos of ALL parts, not just the ones that appear damaged, to assist the service technician in the review.
Before use
- Record pump type, code number, and serial number from the product label.
- Measure and record inlet and outlet pressure.
- Note the total hours of operation.
- Verify filtration (micron) and water temperature.
- Check TDS levels (ppm).
- Note if a VFD is used and record ramp up/down times.
- Check coupling distance before disassembly.
Specs in practice
- Filtration (µm)
- The size of particles the filter removes; essential for preventing pump damage.
Images and diagrams
- Coupling distance: Measure the gap between coupling components before disassembly.
- Shaft seal: Inspect the dynamic rubber bellow and static surface for wear.
- Piston shoe: Check the sliding face and joint bearing for signs of failure.
- Retainer plate: Inspect the guide ball and internal bearings for damage.
- Pins and springs: Ensure all pins and springs are present and intact.
Model compatibility
- This guide is specifically for Danfoss APP 11-22 series pumps.
- Only one product per report is allowed; if the same failure occurs on multiple products of the same type, one report may be used.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.