Driving
5.3 Driving and turning off the truck crane
Operating manual GMK 6400 3 112 993 en 5 - 43
12.07.2013
Checks when
driving downhill
While driving, the engine speed may not exceed 2300 min
-1
(rpm). The
engine speed is not automatically limited.
• Check the current speed on the tachometer while driving.
• Brake the truck crane before the speed exceeds 2300 min
-1
(rpm).
When driving downhill, you can also slow down the truck crane as follows,
in addition to using the service brake:
– By shifting down;
à p. 5 - 43.
– With the engine retarder;
à p. 5 - 44.
– With the eddy current retarder;
à p. 5 - 44.
Downshifting To increase the braking force of the engine, you can select a lower gear.
• Pull the switch lever backwards once.
The
Manual operating mode is switched on, and if possible, one gear is
shifted down.
If you initiate a gear change in which the maximum permitted speed would
be exceeded, the transmission does not shift.
In that case, slow the truck crane down until a maximum permissible engine
speed is reached and downshift again.
s
S
Risk of damage due to excessive engine speed
Shift to a higher gear or slow the truck crane down when the maximum per-
missible engine speed has been reached.
This prevents damage to the engine or transmission.
S
Risk of damage from resonance vibrations
Always maintain a speed below 85 km/h (53 mph). Stop the truck crane
promptly.
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