Spring, American Pneumatic Tool part number 1280582612, previously 01637, listed at Crowder Supply as APT1637. It loads its mating part against the seat. When free length drops, the symptom is inconsistent operation the tool works, but not crisply.
You will find it on the diagram for the 138 Rock Drill and 155 Rock Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
Use the parts diagram hub to work through the rest of the assembly, or the American Pneumatic Tool range if you are pricing a replacement machine. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 1280582612
- Previous part number: 01637
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT1637
- Listed on breakdowns for: 138 Rock Drill, 155 Rock Drill
