This is the Chicago Pneumatic lock off spring part number R157956, which also shows up as 3310103753, Crowder SKU CP-R157956. Springs in a chipping hammer fatigue with cycle count rather than age, so a control that has gone lazy or fails to return is usually this part rather than the component it drives.
Crowder’s breakdowns list this part on the CP 0016 Chipping Hammer and CP 4130 Chipping Hammer, and on 1 other machine. Pull up the diagram and confirm the reference number for your serial before ordering.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the parts breakdown index. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: R157956
- Also listed as: 3310103753
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-R157956
- Listed on breakdowns for: CP 0016 Chipping Hammer, CP 4130 Chipping Hammer, CP 4131 Chipping Hammer
