Dolly Kit for CAT 30821 Valves 310, 340 & 350 Pumps (Need 2) – OEM Replacement Part
Part Number: 7433
Category: Pressure Washer Parts → Pump Parts → Check Valves & Repair Kits
Type: CAT Pumps 30821 Valve Kit
The Dolly Kit for CAT 30821 Valves 310, 340 & 350 Pumps (Part #7433) is a genuine OEM replacement valve service kit designed to restore proper flow control and maintain peak performance in compatible CAT Pumps 310, 340, and 350 series triplex plunger pumps. This kit includes replacement valve components and O-rings (2x3 pieces) required for servicing worn, damaged, or contaminated valve assemblies, helping maintain consistent operating pressure, improve flow efficiency, and extend pump service life.
Important: Two KIT 30821 valve kits are required to completely service all valve assemblies in a compatible CAT Pumps 310, 340, or 350 series pump.
Key Features & Benefits
- Genuine CAT Pumps OEM replacement kit
- Designed for CAT Pumps 310, 340, and 350 series pumps
- Includes replacement valves and O-rings
- Kit contains valve and seal components (2x3 pieces)
- Helps restore proper valve operation
- Maintains operating pressure and flow
- Reduces internal leakage and pressure loss
- Supports efficient pump performance
- OEM-quality materials and construction
- Ideal for preventative maintenance and pump rebuilds
- Direct replacement design
- Helps extend pump service life
Technical Specifications
Part Number: 7433
Manufacturer: CAT Pumps
Manufacturer Model Number: 30821
Product Description: Kit Dolly C1 Valves + O-Rings (2x3 pc)
Product Type: Valve Service Kit
Kit Contents: Valve Components and O-Rings
Pump Compatibility:
- CAT Pumps 310 Series
- CAT Pumps 340 Series
- CAT Pumps 350 Series
OEM Replacement: Yes
Application: Pump Valve Maintenance and Repair
Service Note: Two Kits Required for Complete Pump Service
Common Applications
- CAT Pumps 310, 340, and 350 series pumps
- Pressure washer pumps
- Commercial pressure washing equipment
- Industrial cleaning systems
- Agricultural spraying equipment
- Fleet washing systems
- Water transfer equipment
- Pump rebuild and maintenance services
Performance Benefits
- Restores proper valve operation
- Helps maintain consistent operating pressure
- Improves water flow efficiency
- Reduces internal bypass and leakage
- Supports smooth pump performance
- Improves pump reliability and longevity
- Maintains consistent cleaning performance
- Extends pump service life
Signs Pump Valves May Need Replacement
Replace the valve components if you notice:
- Loss of operating pressure
- Pulsating pressure output
- Reduced flow rate
- Internal water leakage
- Difficulty maintaining pressure
- Excessive valve wear
- Damaged O-rings or sealing components
- Inconsistent pump performance
Installation Notes
- Shut down the pressure washer and relieve all system pressure.
- Disconnect power and water supply.
- Remove valve caps according to CAT Pumps service procedures.
- Remove worn valve and O-ring components.
- Clean valve chambers thoroughly.
- Install new OEM valve components from the kit.
- Reassemble the pump according to manufacturer specifications.
- Test operation and verify proper pressure and flow performance.
Important: A complete valve service for compatible CAT Pumps 310, 340, and 350 series pumps requires two KIT 30821 valve kits. Always verify service requirements using the CAT Pumps parts breakdown for your specific model.
Maintenance Recommendations
- Inspect valves during routine pump maintenance.
- Replace worn valves and O-rings promptly.
- Maintain proper inlet filtration.
- Use clean water sources whenever possible.
- Follow manufacturer-recommended maintenance schedules.
- Address pressure fluctuations immediately to prevent additional pump wear.
