Driving mode
5.3 Driving and parking the truck crane
5 - 42 3 302 819 en Operating manual
GMK3060
13.12.2018
Inspections when
driving downhill
While driving, the engine speed may not exceed 2,300 min
-1
(rpm). The engine
speed is not limited automatically.
• Check the current engine speed on the tachometer (1) while driving. The
lamp (2) lights up when the maximum permissible engine speed is exceeded.
• Brake the truck crane before the engine speed exceeds 2,300
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 - 42,
– With the engine retarder;
à p. 5 - 43
– With the eddy current retarder;
à p. 5 - 43.
Downshifting To increase the braking force of the engine, you can select a lower gear.
• Pull the gearshift lever backwards once.
Manual operating mode is switched on, and if possible, one gear is shifted down.
If you initiate a gear change which would cause the maximum permitted engine
speed to be exceeded, the transmission does not shift.
In that case, slow the truck crane down until a permissible engine speed is
reached, and downshift again.
S
Risk of damage due to excessive engine speed!
If the maximum permissible engine speed is reached, shift up to a higher gear or
slow the truck crane down.
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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