Komatsu D51EX-24, Operation & Maintenance Manual

Page: 89 / 382

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.
FUEL GAUGE
Fuel gauge shows the amount of fuel in the fuel tank.
The indicator should be in the green range during operations.
When the indicator comes close to red range (A) during opera-
tion, check and add fuel.
(A) to (B): Red range
(A) to (C): Green range
REMARK
• When the indicator is in red ranges (A) to (B), fuel level
caution lamp (D) lights up in red.
• The correct fuel level may not be displayed for a short time
after the starting switch is turned to ON position, but this is
not abnormal.
• It does not indicate correct fuel level on the slopes. Place
the machine on a level ground and check the fuel level.
• Check the fuel level on a level ground before operating on
the slopes.
• When operating the machine on the slopes for a long time,
move the machine to a level ground to check the fuel level,
and continue the operation.
OPERATION EXPLANATION OF COMPONENTS
3-33