JCB444 Diesel Engine Piston with Pin 10304A103-04 54mm Combustion Chamber for JCB Excavator

Product Details

Product Overview

This premium replacement piston assembly is specifically designed for the JCB444 diesel engine, a common power unit found in a wide range of JCB construction and agricultural machinery. The part, identified by the reference number 10304A103-04, includes the piston body and the piston pin, ensuring a complete and secure installation for your engine rebuild or repair.

Manufactured with a 54mm combustion chamber diameter, this component is engineered to match OEM specifications, providing a direct fit for the JCB444 engine block. It is a critical part for maintaining compression, fuel efficiency, and overall engine performance in heavy-duty applications such as excavators, loaders, and telehandlers.

Key Features & Benefits

• OEM Specification Fitment: Designed to match the exact dimensions and tolerances of the original JCB444 piston, minimizing the risk of installation errors and ensuring reliable long-term operation.
• Complete Assembly: Supplied with the piston pin, this kit simplifies your procurement process and guarantees that all necessary components are matched for optimal compatibility.
• Durable Construction: Built from high-grade materials suitable for the high compression and thermal loads of a diesel engine, offering resistance to wear and thermal fatigue in demanding work environments.
• Enhanced Combustion Efficiency: The precisely machined 54mm combustion chamber bowl is designed to optimize the air-fuel mixture, contributing to better fuel economy and reduced emissions.
• Rigorous Quality Control: Each piston undergoes outgoing inspection and machinery testing to verify its structural integrity and dimensional accuracy before shipment.
• Versatile Application: Suitable for a wide range of equipment including construction machinery, industrial engines, agricultural tractors, generator sets, and marine applications powered by the JCB444 engine.

Technical Specifications

OEM Cross-Reference

This piston assembly is a direct replacement for the following OEM part numbers. Please verify your engine’s specific requirements before ordering.

• JCB Part Number: 10304A103-04
• Alternative Reference: 10304/A103/04
• Related Assembly: JCB444 Piston & Ring Kit (Pin included)

Note: This part is designed to replace the original JCB component. Cross-reference with your engine serial number is recommended for 100% fitment confirmation.

Compatibility

This piston is specifically designed for the JCB444 diesel engine. It is commonly used for maintenance and repair of the following equipment types:

• Construction Machinery: JCB Excavators, Backhoe Loaders, and Skid Steer Loaders (e.g., 3CX, 4CX, JS Series).
• Agricultural Equipment: JCB Fastrac tractors and Telehandlers.
• Industrial & Stationary: Generator sets (Genset) and industrial pumps powered by the JCB444 engine.
• Marine & Handling: Forklifts and small marine auxiliary engines utilizing this engine platform.

Always consult your equipment’s service manual to confirm the engine model and piston specification before purchase.

Global Supply & Distribution

We provide a reliable global supply chain for B2B customers, ensuring you receive the right parts when you need them.

• Worldwide Shipping: We ship to over 50 countries, including North America, Europe, Southeast Asia, the Middle East, Africa, and Oceania.
• Fast Delivery: Standard and express shipping options available to major ports and industrial hubs (e.g., Rotterdam, Los Angeles, Dubai, Shanghai, Singapore).
• Bulk Orders: Volume discounts and container loading available for large-scale engine rebuilders and distributors.
• Export Compliance: All products are packaged and documented for international trade, with professional customs paperwork provided.

Quality Assurance

Your engine’s reliability is our priority. We adhere to strict quality control measures throughout the manufacturing process.

• Manufacturing Standard: Parts are produced in an ISO-compliant facility (Guangdong, China) with a focus on dimensional accuracy.
• Testing: Each batch undergoes a Machinery Test Report and Video Outgoing Inspection to verify performance.
• Warranty: We offer a 6-month warranty against manufacturing defects, providing peace of mind for your rebuild project.
• Traceability: All parts are marked with batch numbers for full traceability back to the production line.

FAQ

Q1: Will this piston fit my JCB 3CX backhoe loader?
A: The JCB444 engine is commonly used in the 3CX and 4CX models. However, engine serial numbers and piston specifications can vary by year and market. We recommend checking your engine block for the “JCB444” stamp and verifying the original piston diameter (54mm) before purchasing.

Q2: Does this part include the piston rings?
A: This listing is for the piston and piston pin only. Piston rings are not included in this specific kit. For a complete overhaul, you may need to order the corresponding piston ring set separately (often sold as a matched set).

Q3: What is the recommended installation procedure?
A: Professional installation is strongly recommended. The piston pin should be fitted using the correct tool to avoid damaging the connecting rod or the piston boss. Always lubricate the cylinder bore and piston skirt with clean engine oil during assembly. Torque the connecting rod bolts to the manufacturer’s specifications (typically found in the JCB444 service manual).