The Jabsco 20403830 is a genuine Jabsco diaphragm drive assembly for Jabsco diaphragm pumps. The diaphragm drive is the heart of this style of pump: it converts the motor's rotation into the back-and-forth stroke that flexes the diaphragm, drawing liquid in through the inlet check valve and pushing it out through the outlet.
Over time the diaphragm can fatigue, crack or stiffen, and the drive can wear, which shows up as weak flow, a pump that will not build pressure, or leaks at the housing. Replacing the drive assembly with a genuine part restores the original stroke and sealing and brings the pump back to its rated performance.
Key Features
- Genuine Jabsco diaphragm drive assembly
- Restores original pumping stroke and flow
- Designed to seal correctly with the matching Jabsco housing
- Brings back pressure and priming on tired diaphragm pumps
- A core repair part for diaphragm pump rebuilds
Applications
- Jabsco diaphragm pumps that list part 20403830
- Fresh water, washdown and transfer diaphragm pumps
- Repair of pumps with cracked or worn diaphragms
- Marine, RV and utility pump service
Specifications
- Part Number: 20403830
- Part Type: Diaphragm drive assembly
- Brand: Jabsco
- Pump Type: Diaphragm pump
Frequently Asked Questions
Q: What are the signs of a failing diaphragm?
Reduced flow, a pump that runs but will not build pressure, cycling on and off, or liquid leaking from the pump housing all point to a worn or damaged diaphragm.
Q: Should I replace the check valves at the same time?
It is a good idea. Worn valves also cause poor pressure, and replacing both during one repair saves taking the pump apart twice.
Q: Can I install this without special tools?
Most diaphragm pump repairs need only basic hand tools. Note the orientation of parts as they come apart to make reassembly easier.
Q: How do I make sure this fits my pump?
Match the model number from the pump label to its parts list, or send us a photo of the pump plate and we will confirm the correct part.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct diaphragm drive assembly.
CLRMarine
