The 30821 Valve kit includes new valves for a plunger pump. It's used with CAT Pumps 310, 340, 350, and 5CP model pumps. All valves, springs, seats, plugs, and retainers are official CAT replacement parts.
The CAT Pumps 30821 Valve Kit contains OEM valves to service a 310, 340, 350, or 5CP pump. Regular valve replacement keeps your pump running safely and efficiently.
OEM replacement seals
Purchase your seals in a kit to save money and make ordering easier
2 kits are required to fix 1 pump completely
Weight: 0.15 lbs.
Valve Kit Includes:
(3) 44565-Spring Retainer
(3) 43750-Valve Spring (304 S.S.)
(3) 43723-Valve (304 S.S.)
(3) 43725-Valve Seat (304 S.S.)
(3) 43358-O-Ring, Valve Seat (Buna-N)
(3) 48361-Back-up Ring, Valve Seat
(3) 17615-O-Ring, Valve Plug (Buna-N)
Compatible With These Pumps:
310
340
350
5CP
Product Reviews
Frequently Asked Questions
Question:Will this kit fit my Cat 5DX40G1 PUMP?
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George
(09/27/2021)
Response:No, it will not. Please contact our sales department for pricing/availability of the correct valve kit for your pump 800-233-3873.
Question:I have a pump that breaks two of the o rings. I bought replacement o rings and they still breaks them out. Its the top Valve kit that does it. What can I do to solve this problem. Thanks
Phil Winn
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Phil
(04/20/2020)
Response:Most likely the pump head is washed out. You would need the pump head re-sleeved. Please contact our customer service dept. to set this up. 800-233-3873