Komatsu D61EX-24 Operation & Maintenance Manual page 89

EXPLANATION OF COMPONENTS
HYDRAULIC OIL TEMPERATURE GAUGE
Hydraulic oil temperature gauge shows the hydraulic oil tem-
perature.
If the indicator is in green range during operations, it is normal.
If the indicator goes beyond red range (A) during operations,
the overheat prevention system operates.
(A) to (B): Red range
(A) to (C): Green range
(C) to (D): White range
The overheat prevention system is actuated as follows.
Red range (A) position: Hydraulic oil temperature caution lamp (E) shows abnormality display.
Red range (B) position: Engine speed changes to a middle level, hydraulic oil temperature caution lamp (E)
shows abnormality display, and alarm buzzer sounds at the same time.
The overheat prevention system continues to operate until the indicator enters the green range.
When the engine is started, if the indicator is within white range (C) to (D), perform the warm-up operation.
NOTICE
When the indicator comes close to red range (A) during operation, run the engine at low idle or stop it,
and wait for the hydraulic oil temperature to drop.
Display (H) when temperature is correct: Background (K) of hy-
draulic oil temperature caution lamp lights up in blue.
Display (J) when abnormal: Background (K) of hydraulic oil
temperature caution lamp lights up in red.
3-38
OPERATION