AV280 No‑OEM‑AV280 Main Relief Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The AV280 Main Relief Valve (Part # No‑OEM‑AV280) is hydraulic main relief valve, responsible for system pressure limitation and pressure protection, preventing over‑pressure damage to excavator hydraulic circuits and components.

• Factory Wholesale Price: $65 – $135 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel, precision grinding, stable pressure output, high pressure resistant, long service life
• MOQ & Bulk Discount: 1 Unit, favorable quotation for large‑volume repair orders
• Lead Time: 1‑3 working days, sufficient stock supports worldwide logistics delivery
• Warranty: 12‑month replacement warranty, hydraulic pressure performance test completed before packing

2. Application Scope

Specially produced for excavator and engineering machinery hydraulic system:

• Hydraulic System Repair: Direct replacement for malfunctioning, stuck or worn original main relief valve.
• Pressure Protection: Limits system working pressure, protects hydraulic pumps and other core hydraulic parts.
• Repair Workshop: Precise matching dimension, convenient installation, stable pressure regulating effect.
• Overseas Parts Dealer: Stable supply capacity, complete QC records support cross‑border spare‑parts resale business.

3. Common Main Relief Valve Failure Troubleshooting

• Fault 1: System Pressure Too Low, Weak Machine Power
  Cause: Valve core wear, internal dirt blockage, spring fatigue damage.
  Solution: Replace complete main relief valve, clean the whole hydraulic oil circuit and replace filter element.
• Fault 2: System Over‑pressure, Hydraulic Parts Easy To Damage
  Cause: Valve core stuck, pressure adjustment failure.
  Solution: Install new AV280 main relief valve, debug system pressure to standard value after assembly.
• Fault 3: Obvious Hydraulic Noise & Vibration
  Cause: Internal part wear, unstable pressure overflow.
  Solution: Replace with new relief valve, check hydraulic oil cleanliness.
• Fault 4: Oil Leakage From Valve Body
  Cause: Sealing ring aging, thread damage.
  Solution: Replace complete valve assembly or matching sealing accessories.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this main relief valve fits my machine?
A: Please check model number, thread size and pressure parameter, provide part number for fast compatibility confirmation.

Q2: What quality tests are carried out before shipment?
A: Each AV280 main relief valve passes hydraulic pressure test to guarantee stable overflow and pressure‑holding performance.

Q3: What should be noticed during installation?
A: Keep installation position clean, avoid dirt entering valve body, calibrate system pressure strictly after installation.