The pre-installation cleaning of hydraulic fittings directly impacts system reliability and must be executed according to a prescribed procedure. First, remove oil residue, metal shavings, and dust from both the interior and exterior of the fitting; wipe the surfaces with a clean cotton cloth, strictly avoiding the use of cotton yarn to prevent fiber contamination. The threads and sealing grooves should be scrubbed using a specialized cleaning solution or anhydrous ethanol to ensure no impurities remain embedded. The interior of the connecting pipelines must be thoroughly purged-first by circulating high-pressure gas, followed by circulating clean hydraulic fluid-to prevent internal impurities from entering the fitting. Sealing components must be cleaned separately prior to installation and inspected for any burrs, scratches, or deformation; apply a small amount of the same type of hydraulic oil to the surface for lubrication to minimize wear during assembly. The sealing surfaces of both the fitting and the equipment interface require meticulous wiping to ensure they are free of nicks, dents, or corrosion; proper surface finish is essential for establishing an effective seal.
All cleaning operations must be conducted within a clean environment to prevent secondary contamination. Inadequate cleaning can lead to particulate matter scratching sealing surfaces, clogging oil passages, and accelerating wear-significant causes of premature fitting leakage and system failure. Adhering to standardized cleaning protocols can substantially enhance connection stability.
