Dolly Kit for AR 2780 Check Valves XW & XWA Pumps – OEM Replacement Part
Part Number: 7424
Category: Pressure Washer Parts → Pump Parts → Check Valves & Repair Kits
Type: AR (Annovi Reverberi) KIT 2780 Check Valve Kit
The Dolly Kit for AR 2780 Check Valves XW & XWA Pumps (Part #7424) is a genuine OEM replacement valve service kit designed to restore proper flow control and maintain peak performance in compatible Annovi Reverberi (AR) XW and XWA series triplex plunger pumps. This kit includes replacement check valves 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.
Key Features & Benefits
- Genuine AR (Annovi Reverberi) OEM replacement kit
- Designed for AR XW and XWA series pumps
- Includes replacement check valves and O-rings
- Kit contains valve and sealing 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: 7424
Manufacturer: AR (Annovi Reverberi)
Manufacturer Model Number: KIT 2780
Product Description: Kit Dolly A2780 Valves + O-Rings (XW) (2x3 pc)
Product Type: Check Valve & O-Ring Service Kit
Kit Contents: Check Valves and O-Rings
Quantity: Valve and Seal Components (2x3 Pieces)
Pump Compatibility:
- AR XW Series Pumps
- AR XWA Series Pumps
OEM Replacement: Yes
Application: Pump Valve Maintenance and Repair
Common Applications
- AR XW pressure washer pumps
- AR XWA pressure washer pumps
- Commercial pressure washing equipment
- Industrial cleaning systems
- Agricultural spraying equipment
- Fleet washing systems
- Water transfer equipment
- Wash-down systems
- Pump rebuild and maintenance services
Performance Benefits
- Restores proper check 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 Check Valves May Need Replacement
Replace the check valves and O-rings 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 AR service procedures.
- Remove worn valve and O-ring components.
- Clean valve chambers thoroughly.
- Install new OEM check valves and O-rings from the kit.
- Reassemble the pump according to manufacturer specifications.
- Test operation and verify proper pressure and flow performance.
Important: Always consult the AR service manual and verify compatibility with your specific XW or XWA pump model before installation.
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.
