PURPOSE: To change a set position to the frame on either one of left/right sides and wind up and repair a crawler belt simply by setting such a situation that a hydraulic jack can be transferd and changed in its jack up position to either one of both left/right sides near the gravity center position of a car body.
CONSTITUTION: An elevatable hydraulic jack (hydraulic cylinder 12) is provided on the rear side of a car body. The hydraulic jack 12 is usually installed attachably/detachably behind the car body and in the central part of a lateral width direction through an installation bracket 14 and extractable/insertable support shaft 14a and the like. However, the installation head part 12a of the hydraulic jack 12 is engaged with and set to, so as to carry out jacked up either one of the left/right sides out of the downward engagingly recessed parts 15, 15 provided on the left/right running frames 7, 7 in the longitudinal gravity center position of the car body and on either one of the left/right side positions. Consequently, in the case of cut off of the crawler belt and the like, the entire crawler on the side where the frame on cut side subjected a jackup is floated up from the ground and repaired and changed simply.
KOBAYASHI SHIGEO
SAKAI AKIRA
