This is the Atlas Copco cup spring part number 4170055600, Crowder SKU AC-4170055600. Springs in a pump fatigue with cycle count rather than age, so a control that has gone lazy or fails to return is usually this part rather than the component it drives.
It is called out in the parts diagram for the DIP 25 35 65 25US 35US 65US Centrifugal Pump. Worth matching the reference number on the diagram against your own machine before you order the same part number can sit in more than one position.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the full diagram library. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 4170055600
- Manufacturer: Atlas Copco
- Crowder SKU: AC-4170055600
- Listed on breakdowns for: DIP 25 35 65 25US 35US 65US Centrifugal Pump

