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Titan part 550-540 is an LX-40 airless gun parts kit designed to rebuild the LX-40 spray gun on compatible PowrLiner airless stripers. It includes all key wear components needed to restore proper operation, such as the fluid needle, seat, spring, packings, and seals.
When a spray gun becomes worn or begins to leak, it can lead to poor spray patterns, dripping, or pressure loss. Rebuilding with this OEM kit restores reliable triggering, positive shut-off, and consistent spray performance.