Cold Weather Warm Up - Hitachi ZW 180-6 Operator's Manual

Cold Weather Warm Up

IMPORTANT: At starting the engine, the engine RPM
(min ) is kept at low idle for maximum 35 seconds to
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warm up the coolant or hydraulic oil.
After this period, the engine RPM will increase by
applying the accelerator pedal (3).
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.
d
CAUTION: In case the hydraulic oil temperature
is low, perform cold weather warm up. Operate
the machine only after loading linkage speed is
normal. Operating the machine without warming
up first causes damage to the engine and hydraulic
components. Be sure to perform warm up, not only
to protect the hydraulic components from being
damaged, but also to ensure safe operation.
1. Run the engine at slow idle speed for more than 5 minutes
to warm up without stepping on accelerator pedal (3).
If the [Warm Up Operation] in the multi-monitor
setting menu is set to "ON" (enabled), the engine speed
automatically increases from slow idle to 1000 min
(rpm) and enters warm-up mode when hydraulic oil
temperature is 0 °C (32 °F) or lower.
Further, when either hydraulic oil temperature reaches 30
°C (86 °F) or higher, or engine coolant temperature reaches
40 °C (104 °F) or higher, the warm-up mode is automatically
canceled, and the engine runs in slow idle mode.
(Do not operate the machine until the needle of coolant
temperature gauge (1) starts moving.)
IMPORTANT:
 Do not subject the engine to sudden acceleration
until the end of the warm-up period.
 Do not idle the engine for excessively long periods of
time to prevent engine performance decrement.
 Long periods of idling (more than 10 minutes) can
damage an engine because combustion chamber
temperatures drop so low the fuel can not burn
completely. This will cause carbon to form in the
injector spray holes and on the piston rings and can
result in stuck valves.
OPERATING THE ENGINE
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3-12
3
MNEC-01-036
1
MNEC-03-002