Hitachi ZW140-6 Operator's Manual page 197

2. Keep the engine running at low to medium speed for
about 5 minutes more.
f
NOTE: At this time, do not operate the engine in slow or fast
speed. Use medium engine speeds for safe and quick warm
up.
3. Fully extend the bucket cylinder.
f
NOTE: Do not continuously operate the bucket control lever
for more than 10 seconds at a time. Do not bang linkage
when cold.
4. Slowly and fully retract the bucket cylinder.
f
NOTE: Do not continuously operate the bucket control lever
for more than 10 seconds at a time. Do not bang linkage
when cold.
5. Repeat steps 2 to 4 above until the loading linkage
speed is normal. When the air temperature is lower than
0 °C (32 °F), extend the warm up time by running the
engine at about 1200~1500 min
f
NOTE: Headlights, working lights or room light may become
dim during engine preheating in the cold environment.
OPERATING ENGINE
(RPM's).
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