Hitachi ZW 550-6 Operator's Manual page 362

18. Start the engine. Press power mode selector switch
(9) to activate the power mode.
19. Select "Information Menu" - "Monitoring" menu to
display the coolant temperature on the monitor.
(Refer to p. 1-80 Monitoring.)
20. Wait until the engine temperature reach the normal
operation range.
21. Then, run the engine at higher speed until the
coolant temperature reaches 80°C (176°F).
To quickly increase the coolant temperature, turn
the declutch switch to OFF, fully depress the brake
pedal, set the shift lever to the second speed range,
the parking brake SW to OFF, and operate the bucket
lever.
f
NOTE: This operation shows the main menu display
on the monitor panel. Display the coolant temperature
monitoring screen according to the above step 18.
22. After the coolant temperature reaches 80°C (176°F),
keep running the engine at high idle for at least 6
minutes. (This opens the engine thermostat and
releases the air between the radiator and the engine.)
Keep the coolant temperature at 80°C (176°F) or
higher during this high idle operation.
IMPORTANT: Failure to keep the engine at high
idle and the coolant temperature at 80°C (176°F)
or above for at least 6 minutes may result in air
remaining in the EGR coolers and EGR cooler
damage.
23. While running the engine at high idle, turn the heater
ON. This is to bleed the air of the heater circuit. (You
may turn OFF the heater after running for 1 minute.)
24. Run the engine at low idle speed for about 5 minutes
and stop the engine. Wait until the engine is fully
cooled.
25. Check the coolant level in the sub tank and add
coolant to "FULL" level (5).
If the sub tank is empty, the engine cooling system
may have some problem. Check the engine and
cooling system. Consult your nearest authorized
dealer for assistance.
MAINTENANCE
7-78
9
MNEC-01-041
9
MNEC-01-016
5
97Z7-7-89-6