Komatsu PC490LC Installation And Instruction Manual page 323

OPERATION
2.
Swing the upper structure to a right angle to track frame
(2) to be moved out.
3.
Connect bucket (3) and track frame (2) to be moved out by
chain block (4).
4.
Raise track frame (2) to be moved out by using the work
equipment.
REMARK
Raising height (H) of the track frame must be 50 mm or
lower. If the track frame is raised too high, the stopper bolt
will be pried and bent.
5.
Pull track frame (2) with chain block (4) and spread the gauge.
6.
Pull the track frame until it reaches the stopper, and then lower the machine to the ground.
7.
Install removed bolts (1) (9 pieces each on the front and
rear sides).
Tightening torque: 1520 to 1910 Nm {155 to 195 kgm}
Work on the track frame on the other side in the same way.
TRANSPORTATION
3-251