3103753 Piston for Cummins M11 ISM11 QSM11 Engine – Split Piston Top, Excavator Forklift Truck

Product Details

Product Overview

This is a high-quality replacement piston assembly, specifically the split piston top (crown) identified by part number 3103753. Designed for the heavy-duty Cummins M11, ISM11, and QSM11 (CELECT) engine series, this component is critical for maintaining compression and engine efficiency. Commonly used in demanding applications such as excavators, wheel loaders, forklifts, and heavy-duty trucks, this part is a direct replacement for OEM numbers including 4089865 and 3103752.

Manufactured by, this piston is constructed from forged steel/high-grade alloy to withstand the extreme pressures and temperatures of a diesel combustion cycle. As a split piston top, it is designed for engines that utilize a two-piece piston assembly, ensuring a secure fit and reliable performance in your Cummins-powered machinery.

Key Features & Benefits

• Precision Engineering: Manufactured to strict OEM specifications for a direct fit and seamless integration with Cummins M11/ISM11/QSM11 engines.
• Superior Durability: Constructed from high-grade forged alloy steel, offering exceptional resistance to thermal stress and mechanical fatigue for extended service life.
• Enhanced Performance: Restores compression and combustion efficiency, leading to improved engine power output and fuel economy.
• Reliable Replacement: A trusted aftermarket alternative to OEM part number 4089865, providing the same level of performance at a competitive price point.
• Versatile Application: Suitable for a wide range of heavy equipment including excavators (Hyundai R450LC-7A), wheel loaders (Hyundai HL780-7A), and heavy trucks.
• Rigorous Testing: Each unit is subject to outgoing video inspection and machinery test reports to ensure quality and dimensional accuracy.

Technical Specifications

OEM Cross-Reference

This piston (3103753) is a direct cross-reference for the following OEM and aftermarket part numbers:

• Cummins OEM: 3103753, 4089865, 3103752
• Alternate OEM Numbers: 4070653, 4083244

Compatibility

This part is specifically designed for the Cummins M11, ISM11, and QSM11 engine platforms. It is commonly used for the following machinery applications:

• Excavators: Hyundai R450LC-7A, R520LC-9
• Wheel Loaders: Hyundai HL780-7A, HL780-9
• Trucks: Various heavy-duty truck models utilizing Cummins M11/ISM engines
• Forklifts & Industrial Equipment: Large capacity forklifts and industrial generators

Note: Please verify your engine model and serial number to confirm compatibility before purchase.

Global Supply & Distribution

We operate a global supply chain designed to meet the urgent needs of B2B buyers worldwide. Our distribution network ensures fast and reliable shipping to major industrial centers and ports across North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Asia-Pacific (Australia, Singapore, UAE), and the Middle East (Saudi Arabia, UAE).

With extensive export experience, we handle international trade compliance efficiently, offering flexible shipping options including sea freight (FOB/CIF), air freight, and express courier (DHL, FedEx, UPS). We maintain significant stock levels to ensure quick dispatch for both small orders and bulk container shipments.

Quality Assurance

Our manufacturing process adheres to strict international quality standards. Each piston undergoes rigorous inspection to ensure dimensional accuracy, material integrity, and performance reliability. We provide:

• Machinery Test Reports: Available upon request to verify technical specifications.
• Video Outgoing Inspection: We can provide video evidence of the product before shipment for quality verification.
• Warranty: Backed by a standard 6-month warranty (extendable to 1 year for specific applications), covering manufacturing defects.

FAQ

Q: Is the 3103753 piston a direct replacement for the OEM Cummins part 4089865?
A: Yes, the 3103753 is a direct aftermarket replacement for the OEM Cummins part number 4089865. It is also interchangeable with 3103752, 4070653, and 4083244. We recommend checking your engine model (M11/ISM11/QSM11) and serial number to ensure a perfect fit.

Q: What is the difference between a “split piston top” and a standard piston?
A: A split piston top is the upper crown section of a two-piece articulated piston assembly. This design is common in heavy-duty diesel engines to allow the steel crown (which withstands high combustion heat) to be separate from the aluminum skirt (which handles side thrust). This part is specifically the forged steel crown, requiring the matching skirt for complete assembly.

Q: What installation precautions should be taken?
A: When installing this split piston top, ensure the ring grooves are clean and free of carbon deposits. Always use new piston rings and lubricate the piston pin and cylinder bore during installation. It is critical to verify the piston-to-bore clearance and ring end gap per the Cummins engine service manual to prevent seizing or excessive wear.