Cold Weather Warm Up - KCM 70Z7 Operation & Maintenance Manual

Cold Weather Warm Up

IMPORTANT: At starting the engine, the engine RPM
(min -1 ) is kept at low idle for maximum 35 seconds to
warm up the coolant or hydraulic oil.
After this period, the engine RPM will increase by
applying the accelerator pedal (3).
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.
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.)
NOTE:
At this time, do not operate the engine in slow or fast speed.
Use medium engine speeds for safe and quick warm up.
Refer to page 1-61 for Warm Up Operation setting menu.
2. Fully extend the bucket cylinder.
NOTE: Do not continuously operate the bucket control lever
for more than 10 seconds at a time. Do not bang linkage
when cold.
3. Slowly and fully retract the bucket cylinder.
NOTE: Do not continuously operate the bucket control lever for
more than 10 seconds at a time. Do not bang linkage when cold.
4. Repeat steps 1 to 3 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
NOTE: Headlights, working lights or room light may become
dim during engine preheating in the cold environment.
OPERATING THE ENGINE
-1
-1
(RPM's).
3-12
3
MNDB-01-001
1
MNEC-03-002