Description
C0170-31214 4469026 Control Valve Assembly Overview
The C0170-31214 4469026 Control Valve assembly manufactured by Tatan is a high-flow multi-spool sectional hydraulic distribution unit belonging to our Main Control Valve Assembly classification. Engineered specifically for Hitachi ZX70, ZX70-3, ZX70-5G, and ZX75US 7-ton excavators, replacing your worn valve with a Tatan complete assembly eliminates cylinder settling, balances dual-pump confluence digging power, and cures internal pressure bypass across demanding quarry and excavation applications.
Powered by the machine’s main hydraulic pump and matched with the 42.4 kW diesel engine platform, this sectional control valve integrates micro-lapped alloy spools, load-check poppets, auxiliary breaker circuits, and an integrated dozer blade section, ensuring 100% direct bolt-on installation with chassis hydraulic hard lines and pilot control hoses.
Key Attributes & Technical Parameters for C0170-31214 4469026 Control Valve
| Product Category | Main Control Valve Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | KYB C0170 / C0170-31214 Sectional Valve | Brand Name | Tatan |
| Compatible Equipment | Hitachi ZX70 | ZX70-3 | ZX70-5G | ZX75US | OEM Part Number | 4469026 / 4446245 / 4401481 |
| Matched Engine Series | Isuzu 4JG1 / Yanmar 4TNV98 Diesel (42.4 kW) | Place of Origin | Guangdong, China |
| Max Relief Pressure | 24.5 – 26.0 MPa (245 – 260 bar / 3770 PSI) | Port Overload Pressure | 27.5 MPa (275 bar / 3988 PSI) |
| Pilot Control Pressure | 3.9 MPa (39 bar Standard Pilot Line) | Spool Precision Spec | Micro-Lapped < 0.003 mm Clearance |
| Machinery Test Report | Provided (100% Bench Pressure Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | ISO VG 46 Anti-Wear Hydraulic Oil | Packaging | Export Wooden Box Packaging |
Comprehensive Hydraulic Pump & Component Inventory
Tatan maintains extensive factory inventory of complete multi-spool control valves, main pumps, regulators, pilot gear pumps, and internal seal kits across global excavator lines:
Supported Excavator Machinery Brands & Global Coverage
In addition to Hitachi midi excavators, Tatan manufactures and supplies replacement main control valves, hydraulic pumps, and final drives across major equipment brands:
Application Scenarios & Buyer Value
When replacing your 7-ton excavator distribution system with our C0170-31214 4469026 Control Valve, operators and workshop mechanics secure measurable field reliability:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Hitachi ZX70 Valve Replacement | 1:1 direct bolt-on installation eliminates cylinder settling and restores simultaneous boom, arm, and swing speeds. |
| Midi Excavator Repair Workshops | Avoids the labor of disassembling valve slices and resealing tie-rods; installs as a pre-tested complete unit. |
| Civil Trenching & Utility Fleets | Maintains stable 26.0 MPa working pressure during continuous auxiliary breaker hammering and auger drilling. |
| Equipment Parts Stockists | High-demand 7-ton valve assembly ready for immediate global dispatch to minimize customer machine downtime. |
C0170-31214 4469026 Control Valve Diagnostic & Troubleshooting Guide
Use this technical guide to diagnose common hydraulic control valve issues on Hitachi ZX70 series midi excavators:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Boom drops or drifts downward during neutral hold | Boom holding check valve poppet seat wear or port relief valve O-ring leakage allowing pressurized fluid to pass to tank. | Replace with Tatan 4469026 complete control valve assembly with factory pre-seated holding check poppets. |
| 2. Machine veers off course when traveling and blading together | Straight travel spool sticking or internal load check poppet seat wear causing unequal flow distribution to travel motors. | Inspect straight travel pilot pressure; install Tatan pre-calibrated replacement valve to restore balanced flow. |
| 3. Auxiliary attachment weak (breaker / auger stalls) | Auxiliary section port relief valve spring fatigue or foot-pedal pilot actuator shuttle spool contamination. | Clean pilot passages, verify 26.0 MPa relief setting, or bolt on brand-new complete control valve assembly. |
| 4. External fluid seepage between valve sections | Tie-rod bolt elongation or inter-section fluororubber O-rings degraded from continuous oil temperatures over 80°C. | Install new Tatan sectional valve pre-torqued with industrial O-rings and calibrated tie-rod fasteners. |
Transport Packaging & Certified Quality Assurance
Every Tatan control valve undergoes anti-rust oiling, port capping, plastic sealing, and solid export wooden box packaging before international shipment:
✈️ Express Air Courier
Partnered with DHL, FedEx, and UPS for 3-7 day priority delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL container ocean freight for bulk equipment parts replenishment.
📦 Export Wooden Crates
Solid fumigated timber cases lined with thick shockproof foam to prevent transit damage.
C0170-31214 4469026 Control Valve FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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