Deep Well 2.5″ Standard Cylinder Maintenance Kit – Revision B Manufactured after December 2013

SKU 55-200-2-23-01 Category
DescriptionQtyPart Number
A) #6 x 3/8” Phillips Head Screw1204-000-1-45-22
B) Check Valve204-000-5-75-02
C) Piston Cup Seal204-002-3-71-04
D) Internal Retaining Ring204-022-1-68-05
E) End Cap O-Ring404-139-3-70-01
F) O-Ring Pick Tool155-001-0-07-00

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This maintenance kit is for 2.5” standard 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!


Design and Construction

  • Replacements for all wear items
  • Additional stainless steel hardware in case of loss
  • O-Ring Pick Tool to assist in uninstall/install of cup seals and O-rings




Related parts:


This maintenance kit works with these pumps: