High-Heat ACM Resilience: The Polyacrylate (ACM) compound is engineered to maintain flexibility and sealing efficiency at high operating temperatures, significantly outperforming standard NBR in thermal stress conditions.
Specialized Dual-Height Profile: The 10 mm primary height combined with an 18.5 mm total height profile ensures precise axial positioning and provides an enhanced physical barrier against external contaminants.
Precision Mechanical Fit: Specifically optimized for the 85.3 mm housing bore and 45 mm shaft, maintaining consistent radial pressure to prevent oil migration and leaks.
Chemical Additive Resistance: Formulated for maximum compatibility with specialized automotive lubricants and synthetic fluids, preventing lip hardening and ensuring a long service life.
Mercedes-Benz Precision Compliance: Precision-manufactured to match the exact technical standards of Mercedes-Benz reference 0039978347, guaranteeing a reliable factory-standard replacement.
Transparency Note: This component is manufactured under the RICH brand. The listed dimensions and references are used for identification and do not imply affiliation with other manufacturers.