Komatsu PC450-8 Operation & Maintenance Manual page 88

DETAILED CONTROLS AND GAUGES
Display (G) at low temperatures: Monitor background (K) is
white
Display (H) at correct temperatures: Monitor background (K) is
blue
Display (J) when condition is abnormal: Monitor background
(K) is red
Hydraulic Oil Temperature Gauge
This meter (11) shows the hydraulic oil temperature.
During normal operations, the indicator should be in the green
range.
If the indicator enters the red range (A) during operations, the
hydraulic oil temperature is 102°C or more. Run the engine at
low idling or stop it and wait for the hydraulic oil temperature to
go down.
q
(A) - (B): Red range
q
(A) - (D): Green range
q
(D) - (C): White range
REMARK
When the indicator reaches red range (A), the hydraulic oil temperature is as follows.
Red range (A) position: 102°C or more
Red range (B) position: 105°C or more
When the indicator is in red range (A) - (B), hydraulic oil temperature monitor (E) shows the abnormality display.
When the engine is started, if the indicator is at position (C) and the hydraulic oil temperature is 20°C, hydraulic oil
temperature monitor (E) shows the low-temperature display. If this happens, carry out the warm-up operation. For
details, see "Hydraulic Equipment Warm Up (3-133)".
Display (G) at low temperatures: Monitor background (K) is
white
Display (H) at correct temperatures: Monitor background (K) is
blue
Display (J) when condition is abnormal: Monitor background
(K) is red
3-22
OPERATION