Komatsu PC45MR-5 Operation And Maintenance Manual page 265

MACHINE OPERATIONS AND CONTROLS
METHOD FOR CLOSING COOLING COVER
1.
Set the rod (3) to FREE position (F).
The cooling cover (2) becomes free.
2.
While pulling up the cooling cover opening lever (1), close
the cooling cover (2).
3.
Push down the cooling cover opening lever (1), and secure
the cooling cover.
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OPERATION