Komatsu GD555-5 Operation & Maintenance Manual page 70

OPERATION
EXPLANATION OF COMPONENTS
TORQUE CONVERTER OIL TEMPERATURE CAUTION LAMP
This monitor (5) warns the operator that the torque converter oil
temperature has risen.
When it lights up, "E02 TC OVERHEAT" is displayed on the
character display at the same time.
Move the machine immediately to a safe place, stop the machine,
then move the gear shift lever to P (Parking) and run the engine
under no load at a mid-range speed until the lamp goes out.
DIFFERENTIAL OIL TEMPERATURE CAUTION LAMP
(If equipped)
This monitor (6) warns the operator that the differential oil
temperature has risen.
When the lamp lights up, "E02 DIFF OVERHEAT" is displayed on
the character display at the same time. Cancel the differential lock,
move the machine to a safe place, set the gear shift lever to the P
(PARKING) position, and run at the engine at low speed under no
load until the lamp goes out.
HYDRAULIC OIL TEMPERATURE CAUTION LAMP
This monitor (7) warns the operator that the hydraulic oil
temperature rose. When the lamp lights up, "E02 HYD
OVERHEAT" is displayed on the character display at the same
time. Place the machine still in a safe place, stop the engine, and
check.
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