Work machine having a breather device for gear case

A work machine, comprising

• a lower body equipped with a travel unit;
• an upper body equipped with a work unit, and pivotally supported by the lower body around a laterally extending pivot shaft for vertical adjustment of the work unit;
• a lift device fixed to the upper body, which includes a gear case mounted on the upper body and an output shaft connected to the lower body via a link mechanism and provides the power required for raising the upper body relative to the lower body;
• and
• a breather device provided on the gear case defining a gear chamber therein,
• wherein the breather device comprising
• a breather chamber defined in a part of the gear case;
• a breathing hole formed in a wall part defining an upper part of the breather chamber so as to communicate the breather chamber with outside;
• a plurality of communication holes formed in a wall part separating a lower part of the breather chamber from the gear chamber so as to communicate the breather chamber with the gear chamber;
• and
• a separating wall extending partly across the breather chamber so as to define a circuitous passage between the breathing hole and the communication holes, and
• wherein the plurality of communication holes includes a front communication hole and a rear communication hole provided in a front and a rear part of the wall part separating the lower part of the breather chamber from the gear chamber, respectively.