You will need two kits for one pump!

Replacement Valve Kit

The CAT Pumps 33820 Valve Kit allows you to replace the valve assemblies in a 56, 57, or 60 model CAT pump. This version of  the kit includes standard Buna-N rubber o-rings. All official CAT Pumps factory parts.

• Fits on 7-frame plunger pumps
• Buna-N rubber construction
• Genuine manufacturer part from CAT Pumps

Kit Includes:

• PTFE Seat Back-Up Ring; part #43248
  
• Buna-N 80D Seat O-Ring; part #43249
  
• 304 Stainless Steel Seat; part #43722
  
• 304 Stainless Steel Valve; part #43721
  
• 304 Stainless Steel Spring; part #43751
  
• PVDF Spring Retainer; part #44564
  
• Buna-N 70D Valve Plug O-Ring; part #14179
  
• PTFE Valve Plug Back-Up Ring; part #20213

Compatible With These Pumps:

• 56
  
• 56HS
  
• 56G1
  
• 56HSG1
  
• 56G118
  
• 56HSG118
  
• 57
  
• 60
  
• 60G1
  
• 60G118
• 668BGG1

Also fits Cat Pump Model # 668BGG1 8GPM 3500psi.

Cat Pump Service Manual