EC No‑OEM‑EC‑Check‑Valve Hydraulic Check Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The EC Hydraulic Check Valve (Part # No‑OEM‑EC‑Check‑Valve) is one‑way control valve for excavator hydraulic system. It blocks reverse hydraulic oil flow, maintains stable holding pressure of hydraulic actuators, avoids pressure drop and abnormal action of working devices.

• Factory Wholesale Price: $86 – $168 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel, precision grinding, anti‑abrasion, stable pressure‑keeping performance, long service life
• MOQ & Bulk Discount: 1 Unit, favorable price for bulk maintenance orders
• Lead Time: 1‑3 working days, adequate stock supports worldwide logistics shipment
• Warranty: 12‑month replacement warranty, full hydraulic pressure test completed before goods delivery

2. Application Scope

Perfectly fits EC series excavator hydraulic system and engineering machinery overhaul projects:

• Hydraulic Overhaul: Direct replacement for leaking, stuck or pressure‑loss original check valve.
• Hydraulic Circuit Protection: Prevent reverse oil flow, maintain cylinder holding pressure, avoid equipment sudden drop phenomenon.
• Repair Workshop: Good dimensional compatibility, convenient installation, reliable one‑way sealing performance.
• Overseas Parts Dealer: Stable inventory supply, complete QC inspection records support cross‑border spare‑parts trading.

3. Common Check Valve Failure Troubleshooting

• Fault 1: Working Arm Sinking, Poor Pressure‑keeping Performance
  Cause: Valve core sealing surface wear, internal impurity jam, spring fatigue deformation.
  Solution: Install new EC No‑OEM‑EC‑Check‑Valve check valve, clean hydraulic oil circuit and replace filter element.
• Fault 2: Hydraulic Oil Reverse Flow, Abnormal Component Movement
  Cause: Valve spool stuck, one‑way sealing function invalid.
  Solution: Fit No‑OEM‑EC‑Check‑Valve hydraulic check valve, test circuit pressure after assembly.
• Fault 3: Severe Hydraulic Noise & Vibration During Machine Operation
  Cause: Internal parts abrasion, unstable valve core reset.
  Solution: Replace complete valve assembly, check hydraulic oil cleanliness condition.
• Fault 4: Oil Leakage At Valve Thread Connection Joint
  Cause: Sealing ring aging, thread scratch damage.
  Solution: Change whole valve or supporting seal repair kit.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this hydraulic check valve fits my excavator?
A: Please confirm machine model, thread dimension and circuit pressure parameter, provide part number No‑OEM‑EC‑Check‑Valve for fast compatibility verification.

Q2: What quality tests are carried out before shipment?
A: Each EC hydraulic check valve passes strict hydraulic pressure‑holding test to guarantee reliable one‑way sealing performance.

Q3: What points need attention during installation?
A: Keep mounting position clean, prevent dirt entering valve interior, pay attention to oil flow direction mark when installing.