Malfunctions in driving mode
8.4 Troubleshooting
8 - 22 3 302 819 en Operating manual
GMK3060
13.12.2018
8.4.4 Malfunctions in the transmission
H
For more information; Ã Warning messages on the CCS display, p. 8 - 10.
Malfunction Cause Solution
Transmission only shifts
up to 2nd Shift up – the
symbol is displayed
Gear oil too hot Switch to the neutral position
and wait until the gear oil has
cooled down
Gear oil colder than about
-7 °C (20 °F)
Wait until gear oil tempera-
ture rises
Transmission is not
upshifting at speeds over
about 20 km/h (12 mph)
A locking procedure is not yet
completed
Switch off differential locks;
à p. 5 - 57
Transmission not shifting –
the symbol is displayed/
lights up
Retarder switched on
à Switching off the addi-
tional brakes, p. 5 - 43
ABS system defective Have the ABS system
checked by
Manitowoc
Crane Care
or an authorised
GROVE retailer or an
authorised specialised repair
shop.
The transmission does not
respond to the controls
Fuse F1/6 blown Replace blown fuses;
à p. 8 - 43
Transmission cannot shift
down as otherwise the maxi-
mum permissible engine
speed would be exceeded.
Braking the truck crane
Driving display indicates a
malfunction
The electronic gear system
has detected a malfunction
à Warning messages on the
driving mode display, p. 8 - 8
Transmission diagnostics
plug not working
Fuse F1/5, F6/5, F6/6 blown Replace blown fuses;
à p. 8 - 43
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