Sprayer Depot Blog

The pump is the heart in the anatomy of a sprayer. This is by far one of the most important parts in your spray equipment. It requires regular maintenance so it can function as efficiently as possible. The 8000 series diaphragm pump is SHURflo's most widely used agricultural pump. There are two styles in this series, automatic-demand and bypass. 

What's the difference you ask? Automatic demand pumps have a pressure switch on the head that will shut the pump off when it reaches the desired pressure rating. When you spray the wand the pump will turn back on because the pressure has been released. Bypass pumps are not equipped with a pressure switch and continuously run when the pump has power to it. 

If your pump suddenly starts acting up use this helpful infographic to troubleshoot it. Whether the pump head leaks or the pump won"t shut-off, check each of these suggestions to pinpoint the problem:

The pressure switch is by far the most overworked part of your pump. It is constantly running which makes its life expectancy shorter compared to other parts. If you notice that the pressure has decreased, the switch leaks or if your pump won't run or won't shut off then you might need to replace the pressure switch. Replacing the switch is an easy and inexpensive DIY project that will save your equipment unnecessary downtime.

What You'll Need:

Pressure Switch Assembly Kit

Drill/Screwdriver

Installation Process: 

1. Unplug the red power supply wires and inspect them for possible burnt-out*

2. Unscrew the 3 screws to remove the pressure switch

3. Remove the old diaphragm and replace with new one making sure it is flush**

4. Screw the pressure switch back in place

5. Reconnect the power source wires and you are done!

*Kit includes replacement wires 

** An optional Teflon seat is included