LiuGong907 | Auxiliary Relief Valve | Hydraulic Pressure Control Valve Compatible with LiuGong

1. Product Overview & Wholesale Price Range

LiuGong907 Auxiliary Relief Valve is an important hydraulic pressure‑limiting component for excavator hydraulic circuit. It stabilizes working pressure and realizes overflow protection. Common replacement scenarios include unstable system pressure, overflow malfunction, valve spool sticking, internal leakage and poor pressure‑holding performance.

• Factory Wholesale Price: $108 – $165 USD Direct factory price for excavator repair workshops
• Material Specifications: High‑strength alloy valve body, precision‑ground spool assembly, good pressure‑resistance, anti‑wear and anti‑sticking performance, long service cycle
• Fit Application: Hydraulic system compatible with LiuGong907 excavator
• MOQ & Bulk Discount: 1 Unit, favorable price for bulk maintenance orders
• Lead Time: 1‑3 working days, sufficient stock supports global logistics delivery
• Warranty: 12‑month replacement warranty, pressure‑resistance and sealing test completed before delivery

2. Application Scope

This auxiliary relief valve is developed for LiuGong907 excavator hydraulic overhaul:

• Hydraulic Circuit Overhaul: Direct replacement for original damaged auxiliary relief valve assembly.
• Hydraulic Fault Repair: Resolve pressure instability, overflow failure, spool sticking and internal leakage troubles.
• Repair Workshop Usage: Accurate fitting dimension, easy installation, reliable pressure‑limiting and overflow performance.
• Overseas Parts Reseller: Stable stock quantity, complete QC records to support cross‑border excavator spare‑part business.

3. Common Auxiliary Relief Valve Failure Troubleshooting

• Fault 1: Hydraulic System Pressure Instability
  Cause: Spool wear, spring fatigue, hydraulic oil mixed with impurities.
  Solution: Install brand‑new auxiliary relief valve, clean hydraulic circuit and replace filter element.
• Fault 2: Overflow Abnormality
  Cause: Internal component wear, debris stuck inside valve body, spring failure.
  Solution: Replace complete auxiliary relief valve assembly, flush hydraulic oil circuit.
• Fault 3: Valve Spool Sticking
  Cause: Oil dirt and metal particles enter valve body, component deformation.
  Solution: Fit new auxiliary relief valve, clean hydraulic tank and oil‑way thoroughly.
• Fault 4: Internal Leakage of Valve Assembly
  Cause: Sealing surface scratch, long‑term high‑pressure impact damage.
  Solution: Replace auxiliary relief valve, check wear status of matched hydraulic pipelines.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this auxiliary relief valve fits LiuGong907 excavator?
A: Confirm your machine model is LiuGong907, verify mounting thread and dimension parameters before ordering.

Q2: What quality inspection will be done before shipment?
A: Every auxiliary relief valve finishes pressure‑resistance and sealing performance testing before delivery.

Q3: What should I pay attention to during installation?
A: Keep valve body and mounting thread clean, avoid impurities entering hydraulic circuit, test pressure‑limiting performance after installation.