Malfunctions in driving mode
7.6 Troubleshooting
Operating Manual GMK6300L 3 112 xxx en 7 - 33
xx.xx.xxxx
7.6.7 Differential lock malfunctions
7.6.8 Malfunctions in the hydraulic system/hydraulic oil cooler
Malfunction Cause Remedy
Differential locks cannot be
switched on
Current speed above approx.
5 km/h (3 mph)
Slow down or stop the truck
crane
Drive train under tension Slowly drive the truck crane
back and forth,
à p. 5 - 62
Compressed air system
insufficiently filled
à Building up supply pressure,
p. 5 - 10
Fuses F2/1, F4/6, F5/4, F5/7
blown
Replace blown fuses;
à p. 7 - 20
Differential locks cannot be
switched off
Current speed above approx.
5 km/h (3 mph)
Slow down or stop the truck
crane
Drive train under tension Slowly drive the truck crane
back and forth,
à p. 5 - 62
Error symbol is displayed ECOS malfunction Read out error messages
(
à p. 7 - 35) and notify
Manitowoc Crane Care
Malfunction Cause Remedy
Hydraulic oil temperature
above 80 °C , fan in the
hydraulic oil cooler is running
Hydraulic system under
extreme strain and ambient
temperature very high
Stop the truck crane while tak-
ing the traffic situation into
account and run the engine
until the oil has cooled down
Hydraulic oil temperature
above 80 °C, fan in the
hydraulic oil cooler is not
running
Fuse F1/3 blown Stop the truck crane while tak-
ing the traffic situation into
account, and replace the
defective fuse;
à p. 7 - 20.
Defective temperature sensor
in the hydraulic system (error
message is displayed)
Have the temperature sensor
replaced
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