Starting In Cold Weather; Preheating - Hitachi ZW 550-6 Operator's Manual

Starting in Cold Weather

Preheating

1. Turn the key switch (1) ON. The coolant temperature
sensor is activated so that the engine is automatically
preheated.
2. Preheat indicator (2) should turn ON. As long as the
preheat indicator stays ON, the engine is being heated.
f
NOTE:
 Preheating time varies depending on the coolant
temperature.
 Headlights, working lights or room light may become dim
during engine preheating in the cold environment.
3. Turn joystick steering system switch (3) ON. The F/R
selector switch indicator (4) turns ON.
f
NOTE: Turn ON joystick steering system switch (3) after
turning key switch to ON position. Otherwise, the machine
cannot move forward/reverse.
4. As soon as preheat indicator (2) turns OFF, turn key
switch (1) to START position to rotate the starter. As
soon as the engine starts, release the key switch. The key
switch will automatically return to the ON position.
Run the engine at low idle without applying accelerator
pedal (5).
IMPORTANT: At starting the engine, the engine RPM
(min ) is kept at low idle for maximum 35 seconds
-1
to warm up the coolant, hydraulic oil, etc. After this
period, the engine RPM will increase by applying the
accelerator pedal (5).
d
WARNING: Do not operate the machine while the
engine RPM is being kept at low idle, otherwise, the
machine or the front attachment could unexpectedly
move that may result in serious injury.
5. Perform checks to be done after starting the engine by
referring to the following section.
OPERATING THE ENGINE
3-8
1
2
M4GB-01-089
MNEC-01-073
3
115Z7B-1-10-3
4
95Z7B-3-7-1
5
115Z7B-1-81-1