Komatsu PC290LC-11 Operation & Maintenance Manual page 251

OPERATION
13. Before starting the work, check that fuel control dial (4) is
at a 2/3 position between Low idle (MIN) position and High
idle (MAX) position.
If it is not at a 2/3 position, set it to the 2/3 position and run
the engine at 2/3 speed between MIN and MAX before op-
erating.
14. Before starting actual work, repeat the following operation 3 to 5 times.
Circulate warm hydraulic oil through all control circuits.
• Boom operation: RAISE (E) ←→ LOWER (F)
• Arm operation: IN (B) ←→ OUT (A)
• Bucket operation: CURL (D) ←→ DUMP (C)
• Swing operation: LEFT (G) ←→ RIGHT (H)
When performing swing operations, release swing
lock switch (2), check that the swing lock pilot lamp is
OFF, then operate the swing.
• Travel (Lo) operation: FORWARD (A) ←→ REVERSE
(B)
• For attachment operations (if equipped), change the
working mode to the attachment mode.
MACHINE OPERATIONS AND CONTROLS
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