This maintenance kit is for 2.5” stacked cylinders manufactured after December 2013, representing our current cylinder design. The piston assembly and foot valve (our cylinder endcap houses the check valve that serves as the foot valve) use a standard OV40 check valve.
Snap Ring Pliers are required to perform this maintenance. We did not include this tool with the kit. However, you can purchase them from Bison Pumps.
With this kit you will be able to replace all wear items and some hardware to keep your Bison Pump Cylinder running strong!