Yanmar15 | Yanmar15‑Main‑Relief‑Valve | Main Relief Valve Compatible with Yanmar

1. Product Overview & Wholesale Price Range

Yanmar15 Main Relief Valve is a core pressure‑limiting component for mini excavator hydraulic main circuit. It stabilizes system working pressure and protects hydraulic components. Common replacement scenarios include weak digging performance, system pressure drift, hydraulic oil overheating and internal leakage fault.

• Factory Wholesale Price: $86 – $135 USD Direct factory price for excavator repair workshops
• Material Specifications: High‑strength alloy valve body, precision‑machined valve spool, durable pressure spring, excellent sealing and wear‑resistant performance, long service life
• MPN / Part Parameter:Yanmar15‑Main‑Relief‑Valve
• Fit Application: Hydraulic main pressure‑control circuit compatible with Yanmar15 mini excavator
• MOQ & Bulk Discount: 1 Unit, favorable price for bulk maintenance orders
• Lead Time: 1‑3 working days, sufficient stock supports global logistics shipment
• Warranty: 12‑month replacement warranty, pressure‑adjustment and sealing test finished before shipment

2. Application Scope

This main relief valve is customized for Yanmar15 mini excavator hydraulic overhaul:

• Hydraulic Circuit Overhaul: Direct replacement for original damaged main relief valve assembly.
• Hydraulic Fault Repair: Fix insufficient digging power, unstable system pressure, oil overheating and internal leakage malfunctions.
• Repair Workshop Usage: Standard mounting dimension, easy pressure adjustment, reliable pressure‑limiting performance.
• Overseas Parts Reseller: Stable stock quantity, complete QC documents to support cross‑border mini excavator spare‑part business.

3. Common Relief Valve Failure Troubleshooting

• Fault 1: Mini Excavator Digging Power Not Enough
  Cause: Spool abrasion, spring fatigue, impurities mixed in hydraulic oil.
  Solution: Install brand‑new relief valve, flush hydraulic circuit and replace filter element.
• Fault 2: Unstable Hydraulic System Pressure
  Cause: Valve core stuck by dirt, spring deformation, pressure parameter deviation.
  Solution: Replace complete relief valve assembly, clean the whole hydraulic oil loop.
• Fault 3: Hydraulic Oil Heats Up Quickly
  Cause: Internal leakage, continuous overflow, sealing surface scratch.
  Solution: Fit new main relief valve, inspect hydraulic pump working condition at the same time.
• Fault 4: Valve Generates Noise & Vibration
  Cause: Spring damage, spool jitter, hydraulic circuit pressure resonance.
  Solution: Replace relief valve, check pipeline fastening status.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this relief valve fits Yanmar15 mini excavator?
A: Confirm machine model is Yanmar15, check thread size and installation dimension parameters before placing orders.

Q2: What quality test will be done before goods delivery?
A: Each main relief valve completes pressure‑limiting and sealing performance testing before delivery.

Q3: What should be noticed during installation?
A: Clean valve body and mounting surface thoroughly, prevent dirt entering hydraulic circuit, test system pressure after installation.