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 locking plate K 33422 is a safety fastening component designed to secure screw K 33421 against unintended loosening during engine operation. Its primary purpose is to maintain the integrity of bolted assemblies exposed to continuous vibration, cyclic loading, and thermal expansion within the Sulzer ZV40/48 engine. Manufactured from durable, corrosion-resistant materials with excellent mechanical strength, the locking plate provides a simple yet highly effective method of mechanical locking without affecting the serviceability of the assembly. Precision dimensions ensure proper engagement with the corresponding screw and adjacent components while facilitating straightforward installation during maintenance procedures. By preventing fastener movement and preserving assembly stability, the K 33422 locking plate contributes to improved operational safety, increased mechanical reliability, and extended service life of critical engine components.
The lower bearing half K 33220 is a critical load-bearing component within the crankshaft support system of the Sulzer ZV40/48 engine. Its primary role is to support the crankshaft, maintain precise shaft alignment, and provide a durable low-friction running surface capable of carrying substantial mechanical loads generated during engine operation. Manufactured from carefully selected bearing materials with excellent wear resistance, load capacity, and thermal conductivity, the bearing half operates in conjunction with a continuous lubricating oil film to minimize friction and prevent metal-to-metal contact. Precision manufacturing guarantees exact dimensional accuracy and proper bearing clearance, ensuring stable operation under heavy-duty marine and industrial service conditions. By supporting reliable crankshaft rotation and efficient lubrication, the K 33220 lower bearing half contributes significantly to engine durability, operational stability, and long-term reliability.
The coupling piece K 72103 is a precision mechanical transmission component designed for the cylinder lubricating pump K 72101 in the Sulzer ZV40/48 engine. Its primary function is to transmit rotational motion and torque from the drive mechanism to the lubrication pump while maintaining accurate alignment and reliable power transfer. Engineered from high-strength, wear-resistant materials, the coupling piece is capable of withstanding continuous cyclic loading, vibration, and demanding operating conditions commonly encountered in marine and industrial diesel engines. Precision machining ensures accurate fitment, smooth torque transmission, and reduced mechanical stress on connected components. By ensuring dependable pump operation and consistent lubrication delivery, the K 72103 coupling piece contributes to efficient cylinder lubrication, reduced component wear, improved engine reliability, and extended service life.