The thrust ring K 74132 is a precision-machined bearing component designed to control axial movement of gear wheel K 74126 within the Sulzer/Adriadiesel/Jugoturbina/Zgoda ZV40/48 engine. Engineered to absorb axial loads and reduce friction during gear operation, this ring ensures stable gear alignment and smooth power transmission under continuous mechanical stress. Its durable construction minimizes wear on mating components, protects the gearbox assembly, and contributes to long-term reliability and consistent performance in demanding marine and industrial applications.
The kit for the pressure valve, code P51731-04, provides the necessary parts to overhaul or replace the pressure-control valve within the MAN L21/31 engine’s lubrication or fuel system. The pressure valve regulates system pressure, ensuring stable operating conditions, protecting sensitive components, and maintaining optimal flow rates. Over time, valve components may wear or lose calibration due to vibration, thermal stress, or contaminant exposure. This renewal kit restores precise pressure regulation, safeguarding engine performance, preventing lubrication failures, and supporting long-term operational stability in demanding marine and stationary engine environments.
The kit for the cover of the centrifugal filter, code P51715-01, includes the components required to service and restore the protective housing of the MAN L21/31 engine’s centrifugal oil filtration system. The centrifugal filter is vital for removing fine contaminants from lubricating oil, ensuring cleaner circulation and reducing wear on internal components. Maintaining the filter cover ensures proper sealing, safe operation at high rotation speeds, and protection of the filtration system from external contaminants. By ensuring the filter performs at peak efficiency, this kit supports longer oil life, improved lubrication quality, and greater overall engine reliability.
The kit for renewal of piston rings, code P51706-03, provides all essential components needed to restore optimal sealing and compression performance in the MAN L21/31 engine. Piston rings are critical for maintaining combustion efficiency, regulating oil consumption, and ensuring proper heat transfer from the piston to the cylinder liner. Over time, rings wear due to high pressure and thermal cycling, and this renewal kit ensures a complete and precise replacement process. By restoring tight sealing and reducing blow-by, the kit contributes to improved engine efficiency, lower emissions, and extended service life—an indispensable maintenance solution for engines operating under heavy marine or industrial loads.
The O-ring K 74152 is a high-performance sealing component specifically designed for the pump impeller K 74123 used in the ZV40/48 fuel transfer system. Exposed to rotational forces, fuel contact, and thermal variations, this O-ring provides essential sealing between the impeller and adjacent housing surfaces. Its durable, fuel-resistant material reduces wear, maintains pressure stability, and prevents internal leakage, ensuring smooth hydraulic performance. The reliability of the K 74152 O-ring directly influences pump output efficiency and helps guarantee uninterrupted and balanced fuel flow throughout engine operation.
The O-ring K 74150 is a precision sealing element designed for the casing of the fuel transfer pump K 74102 in the ZV40/48 engine. Manufactured from high-grade elastomer resistant to fuel, temperature fluctuations, and mechanical stress, it ensures a tight, leak-free interface between pump casing components. By preventing fuel seepage and protecting the interior from contamination, K 74150 safeguards pump efficiency, extends service life, and supports consistent fuel delivery. Its small size belies its importance, as this O-ring plays a vital role in maintaining the integrity and safety of the entire fuel transfer system.