This is Chicago Pneumatic part number R157957 (also carried as 3310103376) throttle valve – complete, stocked at Crowder Supply as CP-R157957. It governs how air reaches the working end of the chipping hammer. Wear on the sealing land is the usual cause of a throttle that leaks with the trigger released.
It is called out in the parts diagram for the CP 4132 4133 4134 4136 Chipping Hammer and TEX319 320 321 419 421 Chipping Hammer, and on 3 other machines. Check it against the reference number on the diagram first; serial breaks change what fits.
The full diagram library indexes every breakdown we publish, and the Chicago Pneumatic tool range has the tools these parts go into. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: R157957
- Also listed as: 3310103376
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-R157957
- Listed on breakdowns for: CP 4132 4133 4134 4136 Chipping Hammer, TEX319 320 321 419 421 Chipping Hammer, CP 0016 Chipping Hammer, CP 4130 Chipping Hammer, CP 4131 Chipping Hammer
