PC40‑50 No‑OEM‑PC40‑50‑Aux‑Valve Auxiliary Relief Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The PC40‑50 Auxiliary Relief Valve (Part # No‑OEM‑PC40‑50‑Aux‑Valve) is auxiliary pressure‑limiting component matched for excavator main control valve assembly. It undertakes auxiliary overflow function, stabilizes system pressure and protects hydraulic valve and related components against overload impact damage.

• Factory Wholesale Price: $108 – $200 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 PC40‑50 series excavator main control valve hydraulic system and engineering machinery overhaul jobs:

• Hydraulic Overhaul: Direct replacement for worn, stuck or pressure‑drifted original auxiliary relief valve.
• System Pressure Protection: Realize auxiliary overflow pressure‑limiting, stabilize hydraulic system pressure, protect main control valve and hydraulic fittings.
• 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 Auxiliary Relief Valve Failure Troubleshooting

• Fault 1: Excavator Working Action Weak Or Insufficient Power
  Cause: Valve spool wear, internal impurity clogging, spring fatigue deformation.
  Solution: Install new No‑OEM‑PC40‑50‑Aux‑Valve auxiliary 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 PC40‑50 No‑OEM‑PC40‑50‑Aux‑Valve auxiliary 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 auxiliary relief valve fits my excavator?
A: Please verify machine model, mounting dimension and hydraulic circuit pressure parameter, provide part number No‑OEM‑PC40‑50‑Aux‑Valve for fast compatibility check.

Q2: What quality tests are done before shipment?
A: Each PC40‑50 auxiliary 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.