Upper Valve Case Lid is the Chicago Pneumatic service part carried under part number R138490. This part controls the working cycle of the breaker. When its faces wear, the tool sounds different and the blow rate falls off usually the first thing checked on a slow machine.
It shows up in the parts breakdown for the CP 1240 1240S 1240SVR Paving Breaker. Check it against the reference number on the diagram first; serial breaks change what fits.
If you need the parts around it, the full diagram library has the full breakdown library, and the CP tool catalog covers the machines themselves. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: R138490
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-R138490
- Listed on breakdowns for: CP 1240 1240S 1240SVR Paving Breaker
