Description
C0170 YA00000703 Control Valve Assembly Overview
The C0170 YA00000703 Control Valve manufactured by Tatan is a 9-spool hydraulic directional control block belonging to our Main Control Valve Assembly classification. Engineered specifically for Hitachi ZX210-5G, ZX210LC-5G, ZX210H-5G, and ZX200-5G 20-21 ton heavy excavators, swapping to a complete C0170 YA00000703 Control Valve unit eliminates hydraulic cylinder drifting, sluggish boom hoist response, and compound movement lag under demanding quarry and mining operations.
Constructed from high-tensile alloy cast iron with a 4-spool and 5-spool sectional body design, this assembly houses precision-ground spools with micro-tolerances under 0.003 mm to handle high-flow pump discharges from the HIOS III hydraulic system. Pre-fitted with pilot-operated pressure relief valves and load-holding checks, it ensures exact flow division between dual hydraulic main pumps and attachment cylinders under severe rock breakout conditions.
Key Attributes & Parameters for C0170 YA00000703 Control Valve
| Product Category | Main Control Valve Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | KYB C0170 Series 9-Spool Control Valve | Brand Name | Tatan |
| Compatible Equipment | Hitachi ZX210-5G | ZX210LC-5G | ZX210H-5G | OEM Part Number | YA00000703 / 4606144 / 4663196 |
| Main Relief Pressure | 34.3 MPa (343 Bar / 4975 PSI) | Power Boost Pressure | 36.3 MPa (363 Bar / 5265 PSI) |
| Spool Bore Clearance | < 0.003 mm Precision Lapped Clearance | Integrated Circuits | Boom Holding, Arm Regeneration, Travel Straight |
| Machinery Test Report | Provided (100% Bench Pressure Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Body Metallurgy | High-Tensile Alloy Cast Iron Block | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Control Valve Unit | Packaging | Export Reinforced Wooden Box Packaging |
Supported Machinery Brands & Control Valve Coverage
In addition to Hitachi, Tatan manufactures replacement complete main control valves, hydraulic manifolds, and spool cartridges for leading machinery brands:
Application Scenarios & Buyer Value
When resolving hydraulic distribution and control faults with our C0170 YA00000703 Control Valve, workshops and equipment contractors secure tangible operational benefits:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Hitachi ZX210-5G Valve Bank Replacement | Swapping to the C0170 YA00000703 Control Valve completely eliminates machine downtime caused by internal spool scoring and housing micro-cracks under 21-ton rock loads. |
| Hydraulic Service Workshops | Avoids the high cost and failure rate of line-honing worn valve bodies and fitting oversized spools that cause ongoing leakage comebacks. |
| Quarry & Earthmoving Contractors | Restores full 34.3 MPa digging breakout force and smooth compound boom-arm actions without engine lugging down under heavy 1.0 m³ bucket bites. |
| Global Heavy Machinery Stockists | Pre-calibrated, export-ready inventory ready for immediate shipment to international contractors operating classic Dash-5G series machinery. |
C0170 YA00000703 Control Valve OEM Diagnostic Guide
Use this technical diagnostic guide to identify hydraulic control circuit faults on your Hitachi ZX210-5G excavator:
| Hydraulic Circuit Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Boom drops or arm automatically drifts under load | Internal seal deterioration on the boom holding valve poppet seat, or excessive spool-to-bore clearance (> 0.012 mm) bypassing circuit oil to tank. | Replace with a complete factory-tested C0170 YA00000703 Control Valve assembly. |
| 2. Attachment motion is slow while main pump pressure is normal | Port overload relief valve spring fatigue or contaminated poppet seat cracking below rated working pressure (< 26.0 MPa). | Clean or replace individual overload relief cartridges or swap to a pre-calibrated complete valve bank. |
| 3. Joystick feels heavy or hydraulic spool sticks in stroke | Particulate contamination scratching spool lands, uneven mounting bolt torque warping the casting, or varnished pilot end caps. | Flush hydraulic oil gallery, replace return line filters, and install a brand new valve bank with specified torque settings. |
| 4. Machine veers off track during simultaneous digging and travel | Travel straight spool failure or sticking arm regeneration check valve preventing balanced dual-pump flow distribution. | Inspect pilot line pressure (3.9 MPa) and replace with a pre-adjusted complete valve assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan main control valve assembly is preserved with anti-corrosion fluid, capped with steel threaded plugs, sealed in heavy waterproof film, and bolted inside an export-grade reinforced wooden crate.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for 3-7 day express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy control valves and bulk fleet inventory.
📦 Export Wooden Cases
Fumigated solid wooden boxes with custom high-density foam inserts to prevent shipping shock.
Quality Control & International Certificates
Tatan hydraulic components are manufactured under ISO 9001 certified quality control systems and strictly comply with CE industrial pressure equipment safety directives.
C0170 YA00000703 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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