This is Chicago Pneumatic part number C085379, which also shows up as 3310103486 oiler valve seal, stocked at Crowder Supply as CP-C085379. This part controls the working cycle of the pump. When its faces wear, the tool sounds different and the blow rate falls off usually the first thing checked on a slow machine.
The published breakdown lists it on the CP 0020 Sump Pump. Compare it to the reference callout on the diagram to be sure it is the position you need.
If you need the parts around it, the parts breakdown index has the full breakdown library, and the Chicago Pneumatic lineup covers the machines themselves. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: C085379
- Also listed as: 3310103486
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-C085379
- Listed on breakdowns for: CP 0020 Sump Pump
