Komatsu WA470-6 2006, Operation & Maintenance Manual

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Operation 3.2 Explanation of components
WA470-6H – VEAM946100
3-33
1. Torque converter oil temperature gauge
This meter (1) indicates the torque converter oil temperature.
During normal operations, the indicator should be in the white
range (A).
If it enters red range (B) during operations, caution lamp (C)
inside the torque converter oil temperature gauge will light up. At
the same time, the central warning lamp lights up and the alarm
buzzer sounds intermittently.
In addition, “E02“ is displayed on the top line of the character
display and “TC OVERHEAT“ is displayed on the bottom line.
Run the engine at a midrange speed under no load and wait for
the indicator to return to the white range (A).
2. Engine cooling water temperature gauge
This meter (2) indicates the engine coolant temperature.
During normal operations, the indicator should be in the white
range (A).
If the indicator enters red range (B) during operations, caution
lamp (C) inside the engine coolant temperature gauge lights up.
At the same time, the central warning lamp lights up and the
alarm buzzer sounds. In addition, the top line of the character
display displays “E02“ and the bottom line displays “ENGINE
OVERHEAT“.
Run the engine at a midrange speed under no load and wait for
the indicator to return to the white range (A).
3. Hydraulic temperature gauge
This meter (3) indicates the hydraulic oil temperature.
It should be in white range (A) during operations.
If it enters red range (B) during operations, caution lamp (C)
inside the hydraulic oil temperature gauge will light up. At the
same time, the central warning lamp lights up and the alarm
buzzer sounds intermittently.
In addition, “E02“ is displayed on the top line of the character
display and “HYD OVERHEAT“ is displayed on the bottom line.
Run the engine under no load at a mid-range speed and wait
until the indicator goes down to white range (A).
GK032113
A
C
B
GK032114
A
C
B
GK043016
A
C
B