Rocker Arm 8-97306421-3 8973064213 for 4HK1 6HK1 Excavator ZX200-3 ZX240 ZX270-3

Product Details

Product Overview

This genuine rocker arm assembly, identified by OEM part numbers 8-97306421-3 and 8973064213, is a critical component for the valve train system of Isuzu 4HK1 and 6HK1 diesel engines. As a high-wear part, the rocker arm directly influences valve timing, engine breathing, and overall combustion efficiency. This unit is precision-machined to OEM specifications, ensuring a direct replacement for your excavator’s cylinder head assembly.

Commonly used in Hitachi ZX200-3, ZX240, and ZX270-3 excavator models, this part is essential for maintaining the hydraulic and mechanical integrity of the top end. Whether you are servicing a single engine or stocking a fleet, this genuine rocker arm provides the fit confidence required for heavy-duty applications.

Key Features & Benefits

• OEM Fitment: Manufactured to exact original specifications for the Isuzu 4HK1 and 6HK1 series, ensuring a perfect bolt-on installation without modification.
• Long-Lasting Durability: Constructed from high-strength cast iron with hardened contact surfaces to resist wear from camshaft lobes and valve stem tips.
• Verified Part Numbers: Both the 8-digit (8-97306421-3) and 10-digit (8973064213) formats are cross-referenced, eliminating ordering confusion for global buyers.
• Reduced Downtime: Direct replacement minimizes machine downtime. Ideal for scheduled top-end overhauls or emergency field repairs.
• Precision Valve Geometry: Maintains correct rocker arm ratio for optimal valve lift and duration, protecting against power loss and excessive fuel consumption.
• Video Support Available: After-warranty video technical support ensures you have expert guidance during installation if needed.

Technical Specifications

OEM Cross-Reference

This rocker arm is an exact OEM replacement. Use the following reference numbers to verify compatibility with your existing part:

• Primary OEM Number: 8-97306421-3
• Alternate Format: 8973064213

Note: Always cross-reference the physical part with your old component to confirm identical casting geometry and pivot design.

Compatibility

This rocker arm is designed for the Isuzu 4HK1 and 6HK1 engine platforms. It is commonly used for the following excavator models:

• Hitachi ZX200-3
• Hitachi ZX240 (various series)
• Hitachi ZX270-3

Engine Fitment: Specifically engineered for the 4HK1 (4-cylinder) and 6HK1 (6-cylinder) diesel engines. Verify your engine serial number to ensure correct rocker shaft compatibility.

Global Supply & Distribution

We specialize in global export of heavy equipment diesel engine parts. Our logistics network ensures reliable shipping to major industrial markets worldwide, including:

• North America: Express shipping to US and Canadian ports (Houston, Los Angeles, Vancouver).
• Europe: Fast delivery to Rotterdam, Hamburg, and Antwerp for distribution across the EU.
• Asia-Pacific: Direct routes to Singapore, Dubai, and major Chinese ports.
• Middle East & Africa: Reliable service to Jebel Ali, Dammam, and Durban.

We maintain efficient customs documentation and can provide commercial invoices and packing lists required for international trade compliance.

Quality Assurance

We prioritize quality control to ensure you receive a genuine, fully functional part. Our quality process includes:

• Source Verification: Parts are sourced directly from established Japanese supply chains to guarantee authenticity.
• Inspection: Video outgoing inspection and machinery test reports are provided upon request to confirm part condition before shipping.
• Warranty: A 3-month warranty against manufacturing defects is provided. After-warranty video technical support is available to assist with installation or troubleshooting.

FAQ

Q: How do I confirm this rocker arm fits my Hitachi ZX240?
A: First, verify your engine model. The ZX240 typically uses the Isuzu 6HK1 engine. Check the part number stamped on your existing rocker arm. If it reads 8-97306421-3 or 8973064213, this part is a direct match. If your engine is a 4HK1 (found in some ZX200-3 models), this part is also compatible as the rocker arm design is shared across the 4HK1/6HK1 family for these specific models.

Q: Should I replace rocker arms in sets or individually?
A: While this part can be sold individually (MOQ 1), we recommend replacing all rocker arms on the same cylinder head at once if they show uneven wear. This ensures consistent valve clearance and prevents future failures. For a 6HK1 engine, you will need 12 rocker arms (6 intake, 6 exhaust). Always replace the rocker shaft and bolts if they are worn.

Q: What maintenance is required after installing a new rocker arm?
A: After installation, you must perform a valve clearance adjustment according to the Isuzu service manual (typically 0.35mm intake / 0.45mm exhaust for cold engines). Recheck the clearances after 50 hours of operation. Ensure the rocker arm pivot is properly lubricated with clean engine oil during assembly to prevent galling on initial startup.