Transportation vehicle

A haulage vehicle having a vessel pivotably provided relative to the vehicle, a hoist cylinder provided telescopically between the vessel and the vehicle, a hydraulic power source that supplies the hoist cylinder with hydraulic oil, and a valve provided between the hydraulic power source and the hoist cylinder for controlling the flow of hydraulic oil supplied to the hoist cylinder, the haulage vehicle comprising:

• a bushing provided at one end portion of the hoist cylinder;
• a hoist shaft provided in the vehicle and mounted in a through bore of the bushing;
• a lubricant supplier that supplies lubricant to a clearance between a surface of the hoist shaft and an internal surface of the through bore of the bushing;
• a seating detection device that detects whether the vessel is seated on the vehicle or not;
• and
• a controller that when the vessel is seated on the vehicle, controls the valve to make the hoist cylinder contract and also controls the lubricant supplier to supply lubricant to the clearance.