Warming Up Operation In Cold Weather; Note: Illumination Such As Headlight, Work Light Or Room - Hitachi ZW 120-6 Operator's Manual

Warming Up Operation in Cold Weather

d
WARNING: After starting the engine, start the
machine operation only after confirming that the
engine speed changes by operating accelerator pedal
(3).
Otherwise, the machine or the front attachment may
unexpectedly start moving, possibly causing accidents
such as a crash.
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CAUTION: In case the hydraulic oil temperature
is low, perform cold weather warm up. Operate the
machine only after the loader front operating speed
becomes normal. Operating the machine without
warming up operation 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.
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NOTE: Illumination such as headlight, work light or room

light may become dim during the engine preheat operation at
cold temperature.
1. Run the engine at slow idle speed for more than 5
minutes.
The engine speed automatically increases from slow idle
to 1000 min -1 (rpm) and enters warm-up mode when
hydraulic oil temperature is 0 °C (32 °F) or lower.
Further, when either hydraulic oil temperature becomes
30 °C (86 °F) or higher, or engine coolant temperature
becomes 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 swinging.)
OPERATING ENGINE
3-12
3
MNDB-01-001
1
MNEC-03-002