Manitowoc Grove GMK4100L-1 Operating Manual page 256

Driving
5.3 Driving the truck crane and switching it off
Checks when
driving downhill
S
S
Downshifting
5 - 42
While driving, the engine speed may not exceed 2,300 rpm. The engine
speed is not limited automatically.
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.
•
Check the current speed on the tachometer while driving.
•
Brake the truck crane before the speed exceeds 2,300 rpm.
Risk of damage from resonance vibrations
Always maintain a speed below 85 km/h (53 mph). Stop the truck crane
promptly.
When driving downhill, you can also slow down the truck crane as follows,
in addition to using the service brake:
– by shifting down;
– With the engine retarder;
– With the eddy current retarder;
To increase the braking force of the engine, you can select a lower gear.
•
Press the gearshift lever downwards 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.
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p. 5 - 43
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p. 5 - 43.
3 302 690 en Operating manual
GMK4100L-1