Komatsu PC1250-11 Original Instructions Manual page 346

MAINTENANCE PROCEDURE
2.
Swing the upper structure slowly so that water drain holes
(3) in the cab floor are at a low position.
3.
Lower the work equipment to the ground and set the ma-
chine in a stable condition.
4.
Operate the operating portion (g) of the lock lever (1) to set
it securely to LOCK position (L) and stop the engine.
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MAINTENANCE