System for operating and lubricating clutch of work vehicle

A system for operating and lubricating a clutch of a work vehicle, the system comprising:

• a forward-backward switching clutch portion connected to a first transmission hydraulic line;
• a main transmission clutch portion connected to the first transmission hydraulic line such that the main transmission clutch portion is disposed in parallel with the forward-backward switching clutch portion in terms of a circuit;
• an auxiliary transmission clutch portion connected to a second transmission hydraulic line that is disposed in parallel with the first transmission hydraulic line in terms of the circuit;
• and
• a lubricating oil supply portion configured to supply oil as a lubricant supplied from the second transmission hydraulic line to each clutch friction element of the forward-backward switching clutch portion, the main transmission clutch portion, and the auxiliary transmission clutch portion,
• wherein the lubricating oil supply portion is configured such that oil supply to the clutch friction element of the main transmission clutch portion and to the clutch friction element of the auxiliary transmission clutch portion is always allowed and oil supply to the clutch friction element of the forward-backward switching clutch portion is intermittently allowed according to control of a control unit.