SK75 Unload Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The SK75 Unload Valve is vital pressure‑control spare part for excavator hydraulic circuit. It completes pressure unloading and stabilizes system working pressure, protects hydraulic components. Common replacement symptoms include slow action response, hydraulic pressure fluctuation and abnormal system noise.

• Factory Wholesale Price: $132 – $216 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel valve body, precision spool and spring assembly, stable unloading performance, excellent wear‑resistance and sealing performance, long‑term service life
• MOQ & Bulk Discount: 1 Unit, favorable price for large‑volume maintenance orders
• Lead Time: 1‑3 working days, sufficient stock supports worldwide logistics delivery
• Warranty: 12‑month replacement warranty, full hydraulic pressure testing completed before shipment

2. Application Scope

Perfectly fits SK75 excavator hydraulic system and construction machinery overhaul projects:

• Hydraulic Overhaul: Direct replacement for worn, stuck or damaged original unload valve assembly.
• Hydraulic Fault Repair: Resolve slow operation response, pressure fluctuation and abnormal hydraulic noise failures.
• Repair Workshop: Accurate dimension matching, simple installation, reliable unloading performance.
• Overseas Parts Dealer: Stable inventory supply, complete QC records support cross‑border spare‑parts trading.

3. Common Unload Valve Failure Troubleshooting

• Fault 1: Excavator Slow Action Response & Weak Operation
  Cause: Internal spool wear, spring fatigue, dirt trapped inside valve clearance.
  Solution: Install brand‑new SK75 Unload Valve, flush hydraulic circuit and replace hydraulic filter.
• Fault 2: Hydraulic Pressure Fluctuation & Unstable Working Status
  Cause: Valve core abrasion, internal spring performance degradation.
  Solution: Fit SK75 Unload Valve, thoroughly clean the whole hydraulic oil circuit.
• Fault 3: Hydraulic System Overheat & Abnormal Working Noise
  Cause: Internal component wear, oil passages blocked by hydraulic contamination.
  Solution: Replace complete unload valve assembly, check hydraulic oil cleanliness.
• Fault 4: Oil Leakage At Unload Valve Mounting Position
  Cause: Seal ring aging, mating surface scratch damage.
  Solution: Replace full unload valve assembly or matching seal repair kit.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this unload valve fits my excavator?
A: Please confirm excavator model and installation dimension for fast compatibility verification.

Q2: What quality inspection will be carried out before goods dispatch?
A: Every SK75 Unload Valve goes through strict hydraulic test to guarantee stable unloading performance.

Q3: What points need attention while installing unload valve?
A: Keep mounting surface and oil ports clean to prevent dirt entering valve interior, test system pressure after installation.