EX55 No‑OEM‑EX55‑Swing‑Valve Swing Relief Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The EX55 Swing Relief Valve (Part # No‑OEM‑EX55‑Swing‑Valve) is dedicated overflow pressure control valve for EX55 excavator swing hydraulic system. It sets swing loop pressure value, releases excess pressure, prevents overload damage to swing motor and reducer during slewing operation.

• Factory Wholesale Price: $95 – $182 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel, precision grinding, anti‑wear property, stable overflow performance, long service cycle
• MOQ & Bulk Discount: 1 Unit, favorable quotation for bulk maintenance orders
• Lead Time: 1‑3 working days, adequate stock supports global logistics shipment
• Warranty: 12‑month replacement warranty, full hydraulic pressure test completed before shipment

2. Application Scope

Perfectly matched for EX55 excavator swing hydraulic system and engineering machinery overhaul jobs:

• Hydraulic Overhaul: Direct replacement for worn, stuck or pressure‑abnormal original swing relief valve.
• Swing System Protection: Control slewing overflow pressure, protect swing motor and swing reducer against overload impact.
• Repair Workshop: Excellent dimensional compatibility, convenient installation, reliable pressure‑regulating performance.
• Overseas Parts Dealer: Stable stock supply, complete QC inspection records support cross‑border spare‑parts trading.

3. Common Swing Relief Valve Failure Troubleshooting

• Fault 1: Excavator Swing Weak, Slow Rotation Speed
  Cause: Valve spool wear, internal impurity clogging, spring fatigue deformation.
  Solution: Install new No‑OEM‑EX55‑Swing‑Valve swing relief valve, clean hydraulic oil circuit and replace filter element.
• Fault 2: Swing System Over‑pressure, Abnormal Noise When Turning
  Cause: Valve spool jamming, overflow pressure control function failure.
  Solution: Fit EX55 No‑OEM‑EX55‑Swing‑Valve swing relief valve, calibrate swing loop pressure to standard value after assembly.
• Fault 3: Obvious Hydraulic Vibration & Impact Noise During Slewing
  Cause: Internal component abrasion, unstable overflow pressure.
  Solution: Replace complete valve assembly, inspect hydraulic oil cleanliness condition.
• Fault 4: Hydraulic Oil Leakage At Thread Connection Joint
  Cause: Sealing ring aging, thread surface scratch damage.
  Solution: Replace whole valve unit or matching seal repair kit.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this swing relief valve fits my excavator?
A: Please verify machine model, thread dimension and swing system pressure parameter, provide part number No‑OEM‑EX55‑Swing‑Valve for fast compatibility check.

Q2: What quality tests are done before shipment?
A: Each EX55 swing relief valve goes through dedicated swing‑loop hydraulic pressure test to guarantee stable overflow‑limiting performance.

Q3: What should you pay attention to during installation?
A: Keep mounting surface clean to prevent dirt entering valve interior, recalibrate swing system pressure after finishing installation.