The oval flange, code 170901, is a precision-engineered connection component used in the MAN L21/31 engine to establish durable and pressure-resistant joints between piping systems, hoses, and mechanical interfaces. Its oval-shaped geometry allows efficient installation in confined engine spaces while ensuring balanced load distribution and reliable sealing performance under demanding operating conditions. Manufactured from robust and corrosion-resistant materials, the flange is designed to withstand vibration, thermal expansion, and exposure to aggressive marine or industrial environments. By providing stable and leak-tight system connections, the oval flange supports safe fluid transfer, minimizes operational risks, and contributes to the overall reliability and longevity of the engine systems.
The glues, code 395956, refer to specialized industrial adhesives specified for use in the MAN L21/31 engine during assembly, maintenance, and repair procedures. These high-performance bonding compounds are selected to provide secure retention, reliable sealing, and resistance to vibration, temperature fluctuations, lubricants, fuels, and other aggressive operating media. Depending on the application, they may be used for thread locking, sealing threaded joints, retaining cylindrical components, or preventing leakage and loosening of critical engine parts. Manufactured to meet demanding engineering standards, these adhesives help improve assembly reliability, reduce maintenance requirements, and ensure long-term operational stability under severe marine and industrial operating conditions.
The locking spring washer, code 515151, is a critical fastening component used in the MAN L21/31 engine to prevent the loosening of bolted joints caused by vibration, thermal cycling, and dynamic mechanical loads. Designed with elastic spring characteristics that maintain continuous preload, it preserves the strength and stability of mechanical connections throughout prolonged engine operation. Manufactured from hardened, wear-resistant materials and protected against corrosion, the locking spring washer delivers dependable performance in demanding marine and industrial environments. By maintaining fastening integrity and minimizing the risk of connection failure, this component contributes to improved operational safety, lower maintenance costs, and extended service life of engine assemblies.
The expander, code 100100, is a precision-engineered mechanical element used in the MAN L21/31 engine to provide controlled elastic force within sealing, retaining, or positioning assemblies. Frequently installed together with piston rings, sealing systems, or retaining mechanisms, the expander maintains stable contact pressure and compensates for thermal expansion and operational movement throughout engine operation. Manufactured from high-grade spring steel or similarly resilient materials, it is designed to withstand continuous vibration, cyclic loading, and elevated operating temperatures without losing its elasticity or functional reliability. By ensuring efficient sealing and mechanical stability, the expander contributes to reduced leakage, minimized component wear, improved engine efficiency, and extended service life of critical engine assemblies.
The pipe, code 100100, is a precision-engineered fluid transport component used throughout the MAN L21/31 engine to safely convey lubricating oil, fuel, cooling water, compressed air, or other operating media between essential engine systems. Manufactured to strict dimensional tolerances and designed to withstand high pressures, temperature variations, vibration, and corrosive operating environments, the pipe ensures reliable flow with minimal pressure losses. Its robust construction and precise connections help maintain the integrity of lubrication, cooling, and fuel circuits while preventing leakage and contamination. By supporting the continuous and efficient circulation of operating media, the pipe contributes significantly to engine performance, operational safety, and long-term reliability.
The cover with splash tube, code 300100, is a multifunctional assembly within the MAN L21/31 engine that combines protective enclosure with controlled lubrication management. Designed to shield internal engine components from contamination while directing lubricating oil through the integrated splash tube, it ensures efficient lubrication and cooling of critical moving parts during engine operation. Precision-manufactured for accurate fitment and dependable sealing, the assembly is produced from durable, corrosion-resistant materials capable of withstanding continuous thermal and mechanical stresses. By optimizing oil distribution and minimizing uncontrolled oil splash, the cover with splash tube helps reduce component wear, improve operational reliability, and extend the overall service life of the engine.
The assembly spray nozzles, code 200100, consist of a precisely engineered group of spray nozzles designed to deliver lubricants, cooling media, or cleaning fluids to designated areas within the MAN L21/31 engine. Working together as an integrated assembly, these nozzles ensure uniform fluid distribution, accurate atomization, and efficient coverage of critical engine components operating under high thermal and mechanical loads. Manufactured to strict dimensional and flow-performance specifications, the assembly provides reliable operation under varying pressures and temperatures while resisting wear and corrosion. Proper performance of the spray nozzle assembly contributes to improved cooling efficiency, enhanced lubrication, reduced component wear, and increased operational reliability of the engine.
The cover with splash tube, code 300100, is a multifunctional assembly within the MAN L21/31 engine that combines protective enclosure with controlled lubrication management. Designed to protect internal engine components from contamination while directing lubricating oil through the integrated splash tube, it ensures efficient lubrication and cooling of critical moving parts during engine operation. Precision-manufactured for accurate fitment and dependable sealing, the assembly is produced from durable, corrosion-resistant materials capable of withstanding continuous thermal and mechanical stresses. By optimizing oil distribution and minimizing uncontrolled oil splash, the cover with splash tube helps reduce component wear, improve operational reliability, and extend the overall service life of the engine.
The seal ring, code 100100, is a precision-engineered sealing component used throughout the MAN L21/31 engine to prevent leakage and maintain the integrity of critical mechanical and fluid systems. Installed between mating surfaces or around rotating and stationary components, it creates a reliable barrier against the escape of lubricating oil, fuel, coolant, or compressed air while preventing contaminants from entering the engine. Designed to accommodate vibration, pressure fluctuations, and thermal expansion, the seal ring ensures consistent sealing performance under demanding marine and industrial operating conditions. Manufactured from high-quality wear-resistant and chemically resistant materials, it contributes to improved engine efficiency, lower maintenance requirements, and extended service life of vital engine assemblies.
The main bearing cap, code 102985, is a precision-machined structural component that securely retains the main bearing shells and supports the crankshaft within the MAN L21/31 engine. Working together with the cylinder crankcase and tie rods, the bearing cap maintains accurate crankshaft alignment while distributing high mechanical loads generated during engine operation. Manufactured from high-strength materials and engineered to strict dimensional tolerances, it is capable of withstanding continuous vibration, cyclic loading, and elevated operating temperatures. Correct installation and tightening of the main bearing cap are essential for maintaining bearing integrity, minimizing friction and wear, and ensuring the long-term reliability and efficiency of the engine.