EX70 No‑OEM‑EX70‑Main‑Relief‑Valve Main Relief Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The EX70 Main Relief Valve (Part # No‑OEM‑EX70‑Main‑Relief‑Valve) serves as the main pressure control component for EX70 excavator hydraulic circuit. It sets and restricts system maximum working pressure, avoiding over‑pressure damage to hydraulic pumps, motors and related hydraulic parts.

• Factory Wholesale Price: $96 – $185 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel, precision grinding, anti‑wear property, stable pressure‑limiting 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 EX70 excavator hydraulic system and engineering machinery overhaul jobs:

• Hydraulic Overhaul: Direct replacement for worn, stuck or pressure‑drifted original main relief valve.
• System Pressure Protection: Limit maximum working pressure, prevent over‑pressure damage to hydraulic pumps and accessories.
• 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 Main Relief Valve Failure Troubleshooting

• Fault 1: Machine Overall Weak Action, Low System Pressure
  Cause: Valve spool wear, internal impurity clogging, spring fatigue deformation.
  Solution: Install new No‑OEM‑EX70‑Main‑Relief‑Valve main relief valve, clean hydraulic oil circuit and replace filter element.
• Fault 2: System Over‑pressure, Hydraulic Components Easy To Damage
  Cause: Valve spool jamming, pressure‑limiting function failure.
  Solution: Fit EX70 No‑OEM‑EX70‑Main‑Relief‑Valve main relief valve, calibrate system main pressure to standard value after assembly.
• Fault 3: Hydraulic Vibration & Abnormal Noise During Operation
  Cause: Internal component abrasion, unstable pressure overflow.
  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 main relief valve fits my excavator?
A: Please verify machine model, thread dimension and system pressure parameter, provide part number No‑OEM‑EX70‑Main‑Relief‑Valve for fast compatibility check.

Q2: What quality tests are done before shipment?
A: Each EX70 main relief valve passes hydraulic pressure test to guarantee stable pressure‑limiting and overflow performance.

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