Driving
5.3 Driving and parking off the truck crane
Operating Instructions GMK5250L 3 302 633 en 5 - 43
27.09.2017
Additional brakes Engine retarder
The truck crane has an engine flap brake which it uses as an engine retarder.
The engine retarder only becomes effective at an engine speed of 950 rpm
and can be used up to a maximum speed of 2,300 rpm.
Transmission retarder
The braking force of the transmission retarder depends on the speed.
The higher the speed, the higher the brake power.
H
For long downhill stretches, we recommend that you use level 2. When the
transmission retarder is switched on, you cannot regulate the speed with
the accelerator.
Switching on the additional brakes
• Pull the switch back to the required level
(latch into place briefly at each level).
Switching off the additional brakes
• Press the switch upwards to level 0.
When the additional brake is switched on, the lamp (1) lights up.
G
Risk of accidents from unexpected acceleration!
Maintain sufficient distance when the engine retarder is switched on.
The effectiveness of the engine retarder is interrupted during gear shifting.
This may cause the truck crane to accelerate briefly.
1 Only engine retarder
2 Only engine retarder
3 Only engine retarder
Connection to the retarder power:
4
Engine retarder and transmission
retarder
5
Engine retarder and transmission
retarder
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