HITACHI Excavator | C0400‑6006 | Signal Valve Compatible with HITACHI

1. Product Overview & Wholesale Price Range

C0400‑6006 Signal Valve is the core signal‑feedback component of excavator hydraulic control circuit. It undertakes hydraulic signal transmission and adjustment work. Common replacement scenarios include excavator slow operation, travel lag, control signal disorder, signal missing and internal oil leakage.

• Factory Wholesale Price: $112 – $172 USD Direct factory price for excavator repair workshops
• Material Specifications: High‑strength alloy valve body, precision‑ground spool assembly, wear‑resistant internal components, stable pressure‑resistance performance, long service cycle
• Fit Application: Hydraulic control circuit compatible with HITACHI excavator series
• MOQ & Bulk Discount: 1 Unit, favorable quotation for bulk maintenance orders
• Lead Time: 1‑3 working days, sufficient stock supports global logistics shipment
• Warranty: 12‑month replacement warranty, pressure‑resistance and sealing test finished before shipment

2. Application Scope

This C0400‑6006 signal valve is specially manufactured for HITACHI excavator hydraulic overhaul:

• Hydraulic Circuit Overhaul: Direct replacement for original damaged C0400‑6006 signal valve assembly.
• Hydraulic Fault Repair: Fix excavator control signal failure, slow movement response, signal disorder and internal leakage malfunctions.
• Repair Workshop Usage: Accurate mounting dimension, simple installation, stable signal transmission performance.
• Overseas Parts Reseller: Sufficient stock quantity, complete QC documents to support cross‑border excavator spare‑part business.

3. Common Signal Valve Failure Troubleshooting

• Fault 1: Excavator Slow Action & Travel Lag
  Cause: Internal spool wear, spring fatigue, hydraulic oil mixed with impurities.
  Solution: Install brand‑new C0400‑6006 signal valve, flush hydraulic circuit and replace filter element.
• Fault 2: Hydraulic Control Signal Disorder
  Cause: Internal component abrasion, foreign particles stuck inside valve body, spring deformation.
  Solution: Replace complete C0400‑6006 signal valve assembly, clean the whole hydraulic oil loop.
• Fault 3: Valve Spool Sticking
  Cause: Metal debris and oil sludge enter valve interior, part deformation.
  Solution: Fit new C0400‑6006 signal valve, thoroughly clean hydraulic tank and oil passages.
• Fault 4: Internal Leakage of Signal Valve Assembly
  Cause: Sealing surface scratch, long‑term high‑pressure impact damage.
  Solution: Replace C0400‑6006 signal valve, check wear condition of matched hydraulic pipelines.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm C0400‑6006 signal valve suits my excavator?
A: Confirm your excavator model, verify OEM number C0400‑6006 and installation dimension parameters before ordering.

Q2: What quality inspection will be completed before shipment?
A: Each C0400‑6006 signal valve completes pressure‑resistance and sealing performance testing before delivery.

Q3: What points need attention during installation?
A: Clean valve body and mounting surface fully, avoid dirt entering hydraulic circuit, test control signal function after installation.