Komatsu PC450-8, Operation & Maintenance Manual

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OPERATION
MACHINE OPERATIONS AND CONTROLS
3-137
15. Turn fuel control dial (4) to the full speed (MAX) position,
repeat Steps 6 to 9 for 3 to 5 minutes, then check again
that the hydraulic oil temperature monitor is displaying the
correct temperature.
If it is not displaying the correct temperature, repeat Steps
6 to 9 for 3 to 5 minutes until hydraulic oil temperature
monitor (7) displays 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
For both normal temperatures and cold temperatures, carry out the following operation.
16. Check that fuel control dial (4) is at a point midway
between low idling (MIN) and full speed (MAX).
If it is not at the midway position, set it to the midway posi-
tion and run the engine at a mid-range speed before oper-
ating.
17. Before starting operations, repeat the following operations
slowly 3 to 5 times to circulate warm oil through the control
circuits.
q
Boom operation RAISE (E)
←→
LOWER (F)
q
Arm operation IN (B)
←→
OUT (A)
q
Bucket operation CURL (D)
←→
DUMP (C)
When carrying out swing operations, release swing lock
switch (2), check that swing lock monitor (19) goes out,
then operate the swing.
q
Swing operation Left (G)
←→
Right (H)