Driving mode
5.3 Driving and parking the truck crane
Operating manual 3 302 819 en 5 - 43
GMK3060
13.12.2018
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 900 rpm and can
be used up to a maximum speed of 2,300 rpm.
Transmission retarder
The truck crane can also be rigged with a 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.
The lamp (1) lights up and the symbol (2) appears in the CCS display when the
additional brake is switched on.
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.
0 Engine retarder and transmission
retarder off
1 25% brake power
2 50% brake power
3 75% brake power
4 100% brake power
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