This is the American Pneumatic Tool throttle valve part number 1280583532, which replaced the older number 03539, Crowder SKU APT3539. It governs how air reaches the working end of the rock drill. Wear on the sealing land is the usual cause of a throttle that leaks with the trigger released.
It appears on the 115 Rock Drill breakdown. It comes off the APT 115 Pneumatic Rock Drill. Compare it to the reference callout on the diagram to be sure it is the position you need.
Everything else on that machine is one page away, and the parts diagram library indexes every breakdown we publish. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 1280583532
- Previous part number: 03539
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT3539
- Listed on breakdowns for: 115 Rock Drill
