What type of hydraulic generator is used in Truck 7?

The Harrison Hydra-gen PTO hydraulic generator is designed for use in vehicles like fire trucks, specifically optimized for high-performance applications such as those required by fire departments. This type of generator is powered through a power take-off (PTO) connection to the vehicle's engine, allowing it to tap into the existing power of the truck without requiring a separate fuel source.

This integration makes it a reliable choice for emergency services where power is frequently needed in the field. Additionally, the Hydra-gen is known for its durability and the ability to provide consistent hydraulic power, which is crucial during operations that require reliable equipment performance. The other options listed, while they may be valid hydraulic generators, do not specifically match the known equipment used in Truck 7, emphasizing the importance of knowing the exact make and model as per the department's specifications.