Excavator Secondary Rotation Relief Valve Compatible with Excavator

1. Product Overview & Wholesale Price Range

The Excavator Secondary Rotation Relief Valve is the key pressure‑limiting spare part of excavator secondary slewing rotary motor hydraulic circuit. It sets and stabilizes slewing loop working pressure, protects rotary motor assembly from over‑pressure damage. Common replacement symptoms include weak rotation torque, slewing jitter, slow rotation speed and pressure overflow faults.

• Factory Wholesale Price: $126 – $198 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel valve body, precision‑ground spool assembly, durable pressure‑regulating spring and sealing groups, stable pressure‑limiting performance, excellent wear‑resistance for long service life
• MOQ & Bulk Discount: 1 Unit, preferential quotation for large‑volume maintenance orders
• Lead Time: 1‑3 working days, sufficient stock supports worldwide logistics shipment
• Warranty: 12‑month replacement warranty, full hydraulic pressure performance testing completed before shipment

2. Application Scope

This Secondary Rotation Relief Valve suits excavator slewing hydraulic maintenance and overhaul scenarios:

• Rotary Motor Circuit Overhaul: Direct replacement for worn, stuck or damaged original secondary rotation relief valve assembly.
• Hydraulic Fault Repair: Solve weak slewing torque, rotation jitter, slow swing speed and pressure‑overflow failures.
• Repair Workshop Usage: Strict dimensional tolerance, convenient installation, stable pressure‑limiting performance.
• Overseas Parts Reseller: Stable inventory supply, complete QC documents support cross‑border spare‑parts trading.

3. Common Secondary Rotation Relief Valve Failure Troubleshooting

• Fault 1: Excavator Weak Slewing Torque & Slow Rotation
  Cause: Internal spool wear, spring fatigue, hydraulic impurity jamming valve core clearance.
  Solution: Install brand‑new Secondary Rotation Relief Valve, flush hydraulic circuit and replace hydraulic filter element.
• Fault 2: Slewing Jitter & Unstable Rotary Hydraulic Pressure
  Cause: Valve‑core abrasion, pressure‑regulating spring performance degradation.
  Solution: Fit new Secondary Rotation Relief Valve, fully clean the whole hydraulic oil circuit.
• Fault 3: Rotary Circuit Over‑pressure & Rotary Motor Damage Risk
  Cause: Internal parts stuck, oil passages blocked by hydraulic contamination.
  Solution: Replace complete secondary rotation relief valve assembly, inspect hydraulic oil cleanliness.
• Fault 4: Oil Leakage At Secondary Rotation Relief Valve Mounting Surface
  Cause: Seal ring aging, mating surface scratch damage.
  Solution: Replace full secondary rotation relief valve assembly or matched seal repair kit.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How to confirm this secondary rotation relief valve fits my excavator?
A: Please provide machine model and installation dimension for fast compatibility check.

Q2: What quality test will be performed before shipment?
A: Every secondary rotation relief valve passes professional hydraulic pressure‑regulating test to guarantee stable slewing‑loop pressure performance.

Q3: What points should be noticed during installation?
A: Keep mounting face and oil ports clean to avoid dirt entering valve interior, test slewing circuit pressure after installation.