18mm Replacement Bac Cup Assembly
This kit contains all OEM parts from CAT Pumps. The CAT Pumps 30841 Bac-cup Kit contains the parts you need to service a bac-cup assembly on a model 333 pump.
- Genuine CAT Pumps parts kit
- Use with Model 333 Four Frame Piston Pumps
Kit Includes:
- (3) Standard Piston Cup; part 43717
- (3) Piston; part 43784
- (3) Bac-cup Ring; part 43719
WARNING: This product can expose you to chemicals including Lead, which is known to the State of Californiato cause cancer and birth defects or other reproductive harm (For more information go to www.p65warnings.ca.gov).









