Komatsu PC138US-11 Operation & Maintenance Manual page 235

OPERATION
14. 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 the 2/3 point, set it to the 2/3 point and run the
engine at 2/3 speed between MIN and MAX before operat-
ing.
15. Before starting actual operations, repeat the following operations slowly 3 to 5 times to circulate warm oil
through the all control circuits.
Boom control
•
Arm control
•
Bucket control
•
Swing control
•
When performing swing operations, release swing lock
switch (2), check that the swing lock pilot lamp is OFF,
then operate the swing.
Travel (Lo) control
Attachment control
RAISE (E) ←→ LOWER (F)
IN (B) ←→ OUT (A)
CURL (D) ←→ DUMP (C)
LEFT (G) ←→ RIGHT (H)
FORWARD (A) ←→ REVERSE (B)
One side (A) ←→ The other side (B)
MACHINE OPERATIONS AND CONTROLS
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