Cummins QSB6.7 Diesel Engine Cylinder Block 4955412 for Excavator, Truck, Loader

Product Details

Product Overview

This is a high-quality aftermarket cylinder block designed specifically for the Cummins QSB6.7 diesel engine. As the foundational component of the engine block assembly, the cylinder block houses the cylinders, crankshaft, and other critical internal components, providing the structural integrity required for heavy-duty operation. Manufactured under the brand, this cylinder block (Part Number 4955412) is engineered to meet OEM size specifications, ensuring a precise fit and reliable performance in demanding applications such as excavators, forklifts, trucks, loaders, bulldozers, and buses.

This product is an ideal replacement part for engine rebuilds or major overhauls. It is commonly used in construction, agricultural, and industrial machinery that relies on the Cummins QSB6.7 powerplant. Please verify your specific engine model and serial number against the OEM part number 4955412 before purchase to confirm compatibility.

Key Features & Benefits

• OEM Standard Dimensions: Manufactured to the exact OEM size specifications, this cylinder block guarantees a direct fit without modifications, reducing installation time and ensuring proper alignment with pistons, liners, and the crankshaft.
• Durable Cast Iron Construction: Built from high-strength cast iron, this block is designed to withstand the extreme pressures and thermal stress of a turbocharged diesel engine, providing long service life even under continuous heavy loads.
• Precision Machining: All critical surfaces, including the cylinder bores, deck face, and main bearing journals, are machined to tight tolerances. This ensures optimal sealing, reduces oil consumption, and prevents premature wear of internal components.
• Stringent Quality Control: Each cylinder block undergoes a thorough inspection process, including a machinery test report and video outgoing inspection, to verify structural integrity and dimensional accuracy before shipment.
• Versatile Application: Suitable for a wide range of heavy equipment, including excavators, loaders, bulldozers, trucks, and buses, this block is a practical solution for fleet maintenance and equipment rebuilders.
• OEM Service Available: We offer OEM customization services to meet specific requirements, providing flexibility for large-volume orders or specialized machinery needs.

Technical Specifications

OEM Cross-Reference

This cylinder block is a direct replacement for the following OEM part numbers:

• Cummins OEM: 4955412

Note: This part is designed to replace the original Cummins cylinder block. Always confirm the casting numbers on your old block to ensure a match.

Compatibility

This cylinder block is specifically designed for the Cummins QSB6.7 diesel engine. Based on this engine platform, it is commonly used for the following applications:

• Construction Equipment: Excavators, Loaders, Bulldozers
• Material Handling: Forklifts
• On-Highway Vehicles: Trucks, Buses
• Agricultural Machinery: Various tractors and harvesters utilizing the QSB6.7 engine

Fitment is inferred based on the engine model. Please consult your equipment’s service manual or contact our technical support team to verify compatibility with your specific machine model and chassis number.

Global Supply & Distribution

We are a global supplier of heavy-duty engine components, serving B2B clients worldwide. Our distribution network ensures fast and reliable shipping to major industrial markets, including:

• North America: We ship to major ports and industrial hubs in the USA, Canada, and Mexico.
• Europe: Reliable delivery to the UK, Germany, France, Netherlands, and other EU nations.
• Asia-Pacific: Serving markets in Australia, Japan, South Korea, and Southeast Asia.
• Middle East & Africa: Export experience to UAE, Saudi Arabia, South Africa, and Nigeria.
• South America: Regular shipments to Brazil, Chile, and Argentina.

We offer flexible shipping options, including sea freight (FOB/CIF), air express (DHL, FedEx, UPS), and rail freight for bulk orders. Our team handles all export documentation and customs clearance support to ensure a smooth transaction.

Quality Assurance

Quality is our top priority. All cylinder blocks are manufactured in ISO-certified facilities in Guangdong, China. Our quality assurance process includes:

• Material Verification: Spectrographic analysis of cast iron to confirm metallurgical properties.
• Dimensional Inspection: Each block is checked for bore size, deck flatness, and main bearing alignment using precision CMM equipment.
• Pressure Testing: Water jackets and oil galleries are pressure-tested to ensure there are no leaks or porosity defects.
• Machinery Test Report: A detailed report is provided with each shipment, documenting key test results.
• Video Outgoing Inspection: We can provide video evidence of the final inspection upon request, offering full transparency.

We stand behind our products with a 6-month warranty against manufacturing defects. This warranty covers material and workmanship issues under normal operating conditions.

FAQ

Q: How do I confirm this cylinder block fits my Cummins QSB6.7 engine?
A: The part number 4955412 is the primary identifier for the QSB6.7 block. To confirm fitment, please check the casting number on your existing block. It should match 4955412. Additionally, verify your engine serial number (ESN) with your equipment dealer. We recommend measuring the bore size and main bearing journal dimensions against your old block to ensure a match, as there may be slight variations between different QSB6.7 versions.

Q: Does this cylinder block come with cylinder liners or main bearing caps?
A: This product is the bare cylinder block casting. It does not include cylinder liners, main bearing caps, or other internal components. You will need to transfer these parts from your old engine block or purchase them separately. We recommend installing new liners, bearings, and seals during the rebuild process for optimal performance.

Q: What is the recommended installation procedure for this block?
A: Professional installation by a qualified diesel mechanic is strongly recommended. Key steps include: 1) Thoroughly clean the block and all oil passages. 2) Install new core plugs and dowel pins. 3) Check the main bearing bore alignment and install the crankshaft with proper clearances. 4) Install new cylinder liners (if applicable) and ensure proper liner protrusion. 5) Torque all fasteners to Cummins factory specifications. Always refer to the Cummins QSB6.7 service manual for detailed instructions and torque values.