Plunger Spring, American Pneumatic Tool part number 1280582609, which replaced the older number 01634, listed at Crowder Supply as APT1634. It loads its mating part against the seat. When free length drops, the symptom is inconsistent operation the tool works, but not crisply.
It shows up in the parts breakdown for the 138 Rock Drill and 155 Rock Drill. 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.
Everything else on that machine is one page away on the full diagram library; complete tools are on the APT lineup. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 1280582609
- Previous part number: 01634
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT1634
- Listed on breakdowns for: 138 Rock Drill, 155 Rock Drill
