Relief Valve 31QB‑17730 for Hyundai Excavator HX480 L HX520 L R480LC‑9 R380LC‑9SH R520LC‑9A R520LC‑9S

Keywords: 31QB‑17730 relief valve, Hyundai excavator relief valve, HX480 L HX520 L main relief valve, excavator hydraulic spare parts, aftermarket construction machinery parts

Product Overview

This hydraulic relief valve 31QB‑17730 is a vital hydraulic system component specially compatible with Hyundai excavator HX480 L, HX520 L, R480LC‑9, R380LC‑9SH, R520LC‑9A, R520LC‑9S. It limits maximum hydraulic pressure of hydraulic circuit, protects hydraulic pump, cylinders and other hydraulic components from over‑pressure damage, stabilizes system working pressure. Manufactured in accordance with OEM dimensional standard, it is perfect replacement for worn or faulty relief valve, solving machine weak action, pressure instability and hydraulic system abnormal noise.

Detailed Specifications

Key Features & Advantages

• OEM precise dimension, direct install without modification Completely consistent with original installation size, direct fit for matched Hyundai excavator hydraulic main valve, no extra adjustment required.
• High‑strength & wear‑resistant raw material Adopts high‑precision alloy steel material, excellent pressure‑resistance and anti‑wear performance under long‑term high‑pressure hydraulic working environment.
• Excellent working performance & stable operation Sensitive pressure response, stable pressure setting value, effectively avoid system overpressure, keep excavator hydraulic system running smoothly.
• Strict factory inspection & performance test Every relief valve passes hydraulic pressure test, sealing performance test before leaving factory to ensure reliable working performance.
• Perfect interchangeability & easy maintenance Ready‑to‑use replacement spare part, convenient for excavator field repair and hydraulic system overhaul.

Application Scope

Fit Machine: Hyundai Excavator HX480 L, HX520 L, R480LC‑9, R380LC‑9SH, R520LC‑9A, R520LC‑9S ‑ Widely used for excavator repair workshops, machinery fleet maintenance and hydraulic system overhaul projects of construction equipment.

Our Company Advantage

We are professional supplier of full‑range construction machinery spare parts, supplying hydraulic parts, engine parts, electrical parts, seal kits and complete overhaul kits. ‑ Large ready stock for various machinery spare parts ‑ Factory‑direct wholesale competitive price ‑ Mixed‑order & one‑stop spare‑parts procurement supported ‑ Professional part‑number matching technical support service

Packaging & Shipping

Anti‑collision inner package, protect parts during transportation ‑ Export‑grade outer carton for safe sea and land transportation ‑ Multiple shipping options: sea freight, air freight, international express for small trial orders ‑ Export documents such as Commercial Invoice, Packing List can be provided.

Contact Us

If you need more excavator spare parts or other construction machinery replacement components, please send your parts list to us. We will offer our best quotation for you quickly.