Lower Valve Case, American Pneumatic Tool part number 1280583016, which replaced the older number 18692, listed at Crowder Supply as APT18692. This part controls the working cycle of the chipping hammer. When its faces wear, the tool sounds different and the blow rate falls off usually the first thing checked on a slow machine.
You will find it on the diagram for the 260 Chipping Hammer Series and M43 M44 4-Bolt Chipping Hammer. Pull up the diagram and confirm the reference number for your serial before ordering.
Use the parts diagram library to work through the rest of the assembly, or the APT lineup if you are pricing a replacement machine. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 1280583016
- Previous part number: 18692
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT18692
- Listed on breakdowns for: 260 Chipping Hammer Series, M43 M44 4-Bolt Chipping Hammer

