The sleeve K 27406 is a precision-fit bushing designed to support spindle K 27401 in the Sulzer ZV40/48 starting/valve assembly. Acting as a replaceable wear surface, the sleeve maintains correct radial clearance, reduces friction and prevents direct metal-to-metal contact between spindle and housing. Made from a wear- and corrosion-resistant material, it simplifies repairs (the sleeve is cheaper to replace than the housing) and helps preserve alignment and smooth operation — inspect for scoring or ovality during routine maintenance to avoid sticky or misaligned spindles.
The engine pipes and connections group includes all the piping and fittings needed for the circulation of fuel, oil, coolant, and air in the MAN L21/31 engine. This network prevents leaks, maintains pressure, and secures reliable operation. Proper maintenance of pipes and connections is fundamental to efficient and safe engine performance.
The valve drive transfers motion from the camshaft to the engine’s intake and exhaust valves. This precise mechanism ensures timely valve operation, essential for optimal combustion and efficient engine breathing. A reliable valve drive supports engine efficiency, power, and long service life by maintaining accurate valve timing.
The casings for the charge air baffle and air inlet housing play a critical role in directing and managing airflow within the MAN L21/31 engine’s intake system. They ensure compressed air from the turbocharger is efficiently routed to the cylinders, minimizing turbulence and pressure losses. Properly designed casings improve combustion efficiency and overall engine performance by ensuring smooth air distribution.
The cover-for-cover (K 16505) is a secondary protective element that sits over the primary damper-end cover (K 16501), offering an extra barrier against impact, spray and environmental exposure. Often used where splash, debris or mechanical contact are likely, this outer cap increases overall assembly durability and simplifies field servicing by protecting the primary seal and fastenings. In short, K 16505 is a low-profile but effective armor layer that helps keep the damper assembly functioning cleanly and reliably over long operational cycles.
The cover for the damper end (K 16501) is a protective closure that shields the damper’s working face and mounting from contaminants, moisture and mechanical damage on the Sulzer ZV40/48. By keeping dirt and corrosive salts away from the damping surfaces and bearings, the cover preserves damping efficiency and extends component life. Its design also provides a secure sealing surface and mounting interface, making inspections and replacement straightforward while supporting reliable vibration control in demanding marine service.