This service repair factory manual provides comprehensive information for the Hyster B174 (R30ES) Class 2 Electric Motor Narrow Aisle Trucks. Engineered for reliability and efficiency, these trucks are designed for demanding material handling environments. The manual covers various model variations, ensuring detailed guidance for maintaining optimal performance. This manual serves as an essential resource for owners, mechanics, and technicians. It details essential maintenance procedures, troubleshooting steps for components like the Curtis transistor motor controller, and technical specifications. Coverage includes electrical systems, hydraulic systems, steering, braking, and drive units, along with electrical diagrams and guidance system information, all presented in English.