ZAX70 | Signal Valve | Hydraulic Control Valve Compatible with HITACHI

1. Product Overview & Wholesale Price Range

ZAX70 Signal Valve serves as key signal feedback component for excavator hydraulic control circuit. It undertakes hydraulic signal transmission and pressure adjustment. Common replacement scenarios include excavator slow action, traveling lag, control signal disorder, signal loss and internal hydraulic oil leakage.

• Factory Wholesale Price: $115 – $175 USD Factory direct price for excavator repair workshops
• Material Specifications: High‑strength alloy valve body, precision‑machined spool, wear‑resistant spring assembly, reliable pressure‑resistance performance, long service life
• Fit Application: Hydraulic control circuit for ZAX70 excavator series
• MOQ & Bulk Discount: 1 Unit, preferential price for bulk maintenance orders
• Lead Time: 1‑3 working days, sufficient inventory supports worldwide logistics delivery
• Warranty: 12‑month replacement warranty, pressure‑resistance and sealing test completed before shipment

2. Application Scope

This ZAX70 signal valve is specially produced for ZAX70 excavator hydraulic system maintenance:

• Hydraulic Circuit Overhaul: Direct replacement for original damaged ZAX70 signal valve assembly.
• Hydraulic Fault Repair: Solve excavator control signal failure, slow movement response, signal disorder and internal leakage faults.
• Repair Workshop Usage: Precise installation dimension, easy installation, stable signal transmission performance.
• Overseas Parts Reseller: Adequate stock, complete QC records to support cross‑border excavator spare‑part trading business.

3. Common Signal Valve Failure Troubleshooting

• Fault 1: Excavator Slow Action & Travel Lag
  Cause: Internal spool wear, spring fatigue failure, hydraulic oil mixed with impurities.
  Solution: Install brand‑new ZAX70 signal valve, flush hydraulic circuit and replace hydraulic filter element.
• Fault 2: Hydraulic Control Signal Disorder
  Cause: Internal component abrasion, foreign debris stuck inside valve body, spring deformation.
  Solution: Replace complete ZAX70 signal valve assembly, fully clean the whole hydraulic oil loop.
• Fault 3: Valve Spool Sticking
  Cause: Metal debris and oil sludge enter valve interior, internal component deformation.
  Solution: Fit new ZAX70 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 ZAX70 signal valve, inspect wear condition of matched hydraulic pipelines.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How can I confirm ZAX70 signal valve fits my excavator?
A: Confirm your excavator model ZAX70 and double‑check installation dimension parameters before placing orders.

Q2: What quality testing will be done before goods delivery?
A: Each ZAX70 signal valve completes pressure‑resistance and sealing performance testing before shipment.

Q3: What precautions should be followed during installation?
A: Clean valve body and mounting surface thoroughly, prevent dirt entering hydraulic oil circuit, test control signal function after installation.