Work vehicle, monitoring system for work vehicle, and tracked work vehicle

A work vehicle, comprising:

• an engine;
• a transmission arranged to change a speed of rotary motion of the engine;
• a steering clutch that transmits or cuts off power from the transmission, the steering clutch being engaged when supplied with hydraulic fluid;
• a rotary member having a first hydraulic fluid supply channel arranged to supply the hydraulic fluid to the steering clutch, the rotary member being rotated by power from the transmission when the steering clutch is engaged;
• a drive unit driven by the rotary member;
• a support member having a second hydraulic fluid supply channel arranged to supply the hydraulic fluid to the first hydraulic fluid supply channel, the support member rotatably supporting the rotary member;
• a sealing ring disposed between the rotary member and the support member, the sealing ring being mounted adjacent to a connected part between the first hydraulic fluid supply channel and the second hydraulic fluid supply channel;
• a rotational speed sensor that senses a rotational speed of the rotary member;
• and
• a controller that decides a pressure of the hydraulic fluid inside the first hydraulic fluid supply channel and the second hydraulic fluid supply channel, and performs control so that the pressure of the hydraulic fluid becomes the decided pressure,
• the controller including an information output component that outputs maintenance information about the sealing ring when a predicted wear amount of the sealing ring, obtained from the decided pressure, the rotational speed, and a time when the pressure is controlled by the decided pressure while the rotary member is rotating, exceeds a specific threshold.

A tracked work vehicle comprising:

• an engine;
• left and right drive units respectively having left and right crawler belts and left and right drive wheels arranged to drive the left and right crawler belts;
• a power transmission device that transmits a power of the engine to the left and right drive wheels;
• left and right steering clutches, respectively, disposed between the power transmission device and the left and right drive wheels, the left and right steering clutches transmitting or cutting off power;
• left and right steering brakes respectively disposed between the left and right steering clutches and the left and right drive wheels, the left and right steering brakes respectively braking rotation to the left and right drive wheels;
• a stall state determination component that determines whether or not the left and/or the right drive wheel is in a stall state;
• and
• a steering clutch controller that controls clutch pressures of the left and right steering clutches,
• the steering clutch controller controlling the clutch pressures of the left and right steering clutches to be a first pressure when the steering clutch controller determines that the left and right drive wheels are not in the stall state, and
• if the left and/or right drive wheel is determined to be in the stall state, the clutch pressure of the left and/or right steering clutch, respectively, corresponding to the drive wheel determined to be in the stall state is raised to a second pressure that is higher than the first pressure.