hydraulic lift cylinder (Part 90037309), used in the hydraulic lift system on Kalmar Ottawa yard tractors and terminal tractors. It's listed as a hydraulic cylinder with a 125 mm bore and 368 mm stroke, indicating it’s designed to provide linear force and motion for heavy duty tasks such as lifting the 5th wheel assembly. Installs within the hydraulic circuit of the vehicle’s main lift system. When pressurized fluid from the hydraulic pump enters the cylinder, it extends or retracts the piston, converting fluid power into linear mechanical force.