33820 Buna Valve Kit – Fits Cat Pumps 56, 57, 59 & 60 Series (2 Kits Required per Pump)

Part Number: 33820
Category: Pressure Washer → Pump Repair Parts
Type: Buna Valve Kit – Genuine OEM Replacement for CAT Pumps 56, 57, 59 & 60 Series

The 33820 Buna Valve Kit is a genuine OEM CAT Pumps valve replacement kit designed for 7-frame CAT Pumps plunger pumps, including 56, 57, 59, and 60 Series models. This version of the kit features standard Buna-N (NBR) rubber O-rings, making it ideal for general pressure washer and industrial applications where Buna elastomers are specified.

⚠️ Important: Two (2) valve kits are required per pump to complete a full valve replacement.

Compatibility

Fits the following CAT Pumps models:

• 56

• 56HS

• 56G1

• 56HSG1

• 56G118

• 56HSG118

• 57

• 60

• 60G1

• 60G118

Product Details

Brand: CAT Pumps
OEM: Yes – Genuine CAT Pumps Factory Part
Application: Pump Valve Replacement / Preventive Maintenance
Pump Frame: 7-Frame Plunger Pumps
Elastomer Type: Buna-N (NBR)

Kit Contents

• 43248 – PTFE Seat Back-Up Ring

• 43249 – Seat O-Ring, Buna-N 80D

• 43722 – Valve Seat, 304 Stainless Steel

• 43721 – Valve, 304 Stainless Steel

• 43751 – Valve Spring, 304 Stainless Steel

• 44564 – Spring Retainer, PVDF

• 14179 – Valve Plug O-Ring, Buna-N 70D

• 20213 – Valve Plug Back-Up Ring, PTFE

Key Features

• Genuine CAT Pumps OEM valve kit

• Designed for 56, 57, 59 & 60 Series 7-frame pumps

• Standard Buna-N (NBR) sealing components

• Corrosion-resistant 304 stainless steel valves and springs

• Restores pressure, flow consistency, and pump efficiency

• Two kits required per pump for complete service

• Exact OEM replacement — no modifications required