Ensure your semi is ready for the journey ahead with a reliable hydraulic dump to transfer loads, with the OTR PK Series 13 GPM Hydraulic Box Pump with Expertise Built In™. To dump the contents on the surface below, this replacement component uses a pressurized system to elevate the beds of trucks and trailers. Built with a solid metal body to withstand high-pressure applications. FleetPride is your First Click in Heavy Duty®.