Field Service Mechanic B

About the role

Job Purpose: As a Field Service Mechanic B, you are an intermediate-level technician with a solid foundation of mechanical knowledge expanding into more complex diagnostics and repairs in the field. You have mastered foundational operating procedures at the branch level and are progressing toward mastery of regional and national standards. Your primary focus is to support fleet maintenance operations at customer job sites from a service truck, ensuring Herc Rentals equipment remains on the rental 'ready line' through effective preventative and corrective maintenance, while mentoring Field Service Mechanic C‑level technicians.

Responsibilities

• Preventative Maintenance (Field): maintain PM schedules for Herc-owned fleet at active job sites; independently perform oil changes, filter replacements, and lubrication from the service truck; replace oil/fuel filters, water pumps, thermostats, and radiators onsite; manage coolant levels, flush systems, and maintain hose quality; perform DPF/DEF system maintenance at the job site; conduct visual/operational inspections of engines, belts, hoses, and major systems; inspect for oil leaks, correct fuel type, and fluid levels per OEM recommendations.
• Intermediate Diagnostics & Repairs (Field): diagnose/repair cooling systems; identify electronic and mechanical problems onsite; test engine cooling and fuel systems (lines, leaks); troubleshoot/repair electrical systems—wiring, connectors, control units—from the service truck; replace faulty turbos, alternators, and sensors; diagnose pressure loss, overheating, and sluggish movement on aerial equipment; use computerized tools to trace electrical faults, connections, switches, sensors, and safety interlocks; replace hoses, hydraulic pumps, motors, wiring, and sensors; replace guardrails, platforms, and outriggers; replace aerial lift leveling components; perform annual aerial inspections; service emission control components (DPF).
• Intermediate Electrical Tasks (Field): inspect starter motor, solenoid, and ignition switch; check cranking amperage and abnormal noises; inspect wiring harnesses for fraying, cracks, exposed wires, or overheating; replace as needed; inspect lighting wiring/switches and cabin for moisture ingress or electrical damage; inspect/test relays and circuitry; replace faulty components; inspect/recalibrate overvoltage protection systems and indicator lights; inspect/test voltage