PC40 No‑OEM‑PC40‑Main‑Valve Main Relief Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The PC40 Main Relief Valve (Part # No‑OEM‑PC40‑Main‑Valve) is the key pressure‑limiting component matched for PC40 excavator main control valve assembly. It sets maximum hydraulic system pressure, releases excess pressure, stabilizes system operation and protects hydraulic pump, valve and actuators against overload impact damage.

• Factory Wholesale Price: $112 – $205 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 PC40 series excavator main control valve hydraulic system and engineering machinery overhaul jobs:

• Hydraulic Overhaul: Direct replacement for worn, stuck or pressure‑drifted original main relief valve.
• System Pressure Protection: Set maximum system pressure, release overflow pressure, protect whole hydraulic system from overload.
• Repair Workshop: Excellent dimensional compatibility, convenient installation, reliable pressure‑control 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: Excavator Working Action Weak Or Insufficient Digging Power
  Cause: Valve spool wear, internal impurity clogging, spring fatigue deformation.
  Solution: Install new No‑OEM‑PC40‑Main‑Valve main relief valve, clean hydraulic oil circuit and replace filter element.
• Fault 2: Hydraulic System Pressure Unstable & Fluctuation
  Cause: Valve spool jamming, pressure setting deviation.
  Solution: Fit PC40 No‑OEM‑PC40‑Main‑Valve main relief valve, adjust pressure value according to machine specification 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 Connection Joint
  Cause: Sealing ring aging, joint 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, mounting dimension and hydraulic circuit pressure parameter, provide part number No‑OEM‑PC40‑Main‑Valve for fast compatibility check.

Q2: What quality tests are done before shipment?
A: Each PC40 main relief valve passes hydraulic overflow pressure test to guarantee stable working performance.

Q3: What should you pay attention to during installation?
A: Keep mounting surface clean to prevent dirt entering valve interior, calibrate system pressure and bleed air from hydraulic circuit after installation.