The O-ring K 27276 is designed as the sealing element where metal tube K 27264 interfaces with fittings or housings in the ZV40/48 fuel pressure line. Its job is to create a fluid-tight joint against a smooth tube surface under high pressure and vibration. Typically specified from a chemically resistant elastomer compatible with diesel, the ring must be fitted to the correct groove and protected from scoring during assembly. Regular checks and prompt replacement of this O-ring prevent seepage at tube joints and help maintain stable injection pressure and engine performance.
The O-ring K 27275 is a small but crucial sealing element specified for housings K 27259 and K 27263 on the Sulzer ZV40/48 fuel system. Installed between mating faces, this O-ring prevents high-pressure fuel leaks and protects surrounding components from contamination. Made from a fuel-resistant, heat-stable elastomer, it must tolerate pressure pulsations and vibration while retaining elasticity. Because O-rings are wear items, keeping spares and checking for hardening, cuts or compression set during routine inspections is a simple, high-value step to avoid fuel loss and maintain safe, reliable operation.
The nut K 27258 secures the fuel pressure valve in the Sulzer ZV40/48 and is a small but safety-critical fastener: it holds the valve body, maintains sealing compression on washers/O-rings, and resists loosening from vibration and pressure pulses. Typically made from high-strength, corrosion-resistant steel and fitted with the specified torque (and locking means where required), correct installation prevents leaks and pressure loss. Include this nut in routine inspections — replace if rounded, corroded or if preload is lost to ensure reliable fuel pressure control.
The fuel pressure line K 27251 denotes an individual high-pressure pipe section used in the ZV40/48 fuel system; it carries metered fuel under pressure from pump or distributor to the valve body. Manufactured to tight tolerances and from materials resistant to fuel, pressure and vibration, this single line is a critical flow path — even small nicks or deformation will compromise pressure and lead to leaks or spray. Technicians should check supports, fittings and protective sleeves during each service interval and replace the line if bending, corrosion or erosion is observed.
The complete fuel pressure line K 27250 is a ready-to-install assembly for the Sulzer ZV40/48 that includes the high-pressure tubing, end fittings, seals and any required brackets or flexible sections to connect the fuel pump or distributor to the injection or control valves. Built and routed to withstand the engine’s operating pressures and vibration, a complete line saves installation time and reduces leak risk because the components are matched and pressure-tested as an assembly. Regular inspection of the fittings, clamps and seals on the complete line is essential — replace any softened O-rings or corroded fittings immediately to keep injection timing and engine performance consistent.
The O-ring K 27411 is specified as the sealing element for parts K 27402 and K 27403, providing fluid-tight joints in the starting-valve subassembly of the Sulzer ZV40/48. Typically made from a chemical- and heat-resistant elastomer, this O-ring prevents oil or hydraulic fluid leaks that would degrade valve response or contaminate adjacent components. Because O-rings are wear items, keeping spares and replacing them whenever seals show hardening, nicks or compression set is a simple, high-value preventative measure to maintain reliable engine start and valve integrity.
The piston ring K 27409 is a small but vital sealing component that fits piston K 27404 in the starting-valve mechanism of the ZV40/48. Its job is to maintain a reliable seal under varying pressure and temperature, preventing blow-by and ensuring the piston transmits force efficiently. Manufactured to tight tolerances from resilient, oil- and heat-resistant material, the ring contributes directly to consistent valve actuation and longevity — regular checks for wear, cracking or loss of spring tension help prevent leaks and erratic starting behavior.
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 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.