Komatsu PC450-8 Operation & Maintenance Manual page 200

MACHINE OPERATIONS AND CONTROLS
1. Check that engine coolant temperature monitor (1) dis-
plays the correct temperature.
(A) Display when temperature is correct: Monitor back-
ground (C) is blue
(B) Display when temperature is low: Monitor background
(C) is white
If it displays low temperature, carry out additional warm up
of the engine until engine coolant temperature monitor (1)
displays the correct temperature.
For details of the procedure, see "Engine Warm Up (3-
131)".
2. Turn swing lock switch (2) ON and check that the swing
lock monitor lights up.
3. To complete the warm-up operation of the hydraulic equip-
ment more quickly, set the working mode to P mode
(heavy-duty mode).
For details of the procedure for setting the working mode,
see "Working Mode Selector Switch (3-25)".
4. Move lock lever (3) slowly to the FREE position (F), then
raise the bucket from the ground.
3-134
OPERATION