CAT307D No‑OEM‑CAT307D Load Relief Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The CAT307D Load Relief Valve (Part # No‑OEM‑CAT307D) is the load unloading valve for excavator hydraulic system. It completes system pressure unloading, prevents over‑pressure impact, protects hydraulic pump and related pipeline assemblies, and keeps stable working performance of the whole machine.

• Factory Wholesale Price: $64 – $132 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel, precision grinding treatment, anti‑wear, stable pressure output, long service life
• MOQ & Bulk Discount: 1 Unit, competitive price for bulk repair orders
• Lead Time: 1‑3 working days, adequate stock supports global logistics shipment
• Warranty: 12‑month replacement warranty, hydraulic pressure test finished before delivery

2. Application Scope

Designed for CAT307D excavator hydraulic circuit and engineering machinery overhaul:

• Hydraulic Repair: Direct replacement for worn, stuck or invalid original load relief valve.
• Pressure Unloading Protection: Realize system pressure unloading, reduce hydraulic impact and protect core hydraulic components.
• Repair Workshop: Good dimensional compatibility, convenient installation, stable unloading performance.
• Overseas Parts Dealer: Stable inventory supply, complete QC records support cross‑border spare‑parts trading.

3. Common Load Relief Valve Failure Troubleshooting

• Fault 1: Excavator High Fuel Consumption, Hydraulic Heat Seriously
  Cause: Valve core wear, internal impurity clogging, spring fatigue deformation.
  Solution: Install new load relief valve, clean hydraulic oil circuit and replace filter element.
• Fault 2: Hydraulic System Over‑pressure, Easy To Damage Hydraulic Fittings
  Cause: Valve core stuck, unloading function failure.
  Solution: Fit CAT307D load relief valve, calibrate hydraulic system pressure to standard value after assembly.
• Fault 3: Abnormal Hydraulic Noise & Vibration During Operation
  Cause: Internal parts abrasion, unstable unloading pressure.
  Solution: Replace complete valve assembly, check hydraulic oil cleanliness.
• Fault 4: Oil Leakage At Valve Thread Connection Position
  Cause: Sealing ring aging, thread surface scratch damage.
  Solution: Change whole valve or matching seal repair kit.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this load relief valve fits my excavator?
A: Please confirm machine model, thread dimension and pressure parameter, provide part number for fast compatibility verification.

Q2: What quality tests are carried out before shipment?
A: Each CAT307D load relief valve will pass hydraulic pressure test to guarantee stable unloading and pressure‑holding performance.

Q3: What points need attention during installation?
A: Keep mounting area clean, prevent dirt entering valve interior, adjust hydraulic system pressure strictly after installation.