2191-P550138
Hydraulic Cartridge
Mack

The Hydraulic Cartridge is a precision-spined valve element used in hydraulic control systems to regulate pressure, flow, or actuation within heavy-duty equipment. Its modular cartridge design allows quick replacement without dismantling entire assemblies, reducing downtime during service and minimizing contamination risk. A properly selected cartridge provides stable, repeatable performance under varying load conditions, helping to maintain accurate steering assist, suspension actuation, or hydraulic braking where applicable. The seals, tolerances, and surfaces are engineered to resist wear, corrosion, and debris infiltration, extending service life and maintaining system efficiency. Installation is streamlined with standardized interfaces, aiding field technicians in achieving consistent results. By swapping the cartridge rather than the entire valve body, fleets benefit from improved uptime and lower maintenance costs. Source One Parts Center.