Driving
5.3 Driving the truck crane and switching it off
5 - 46 3 112 xxx en Operating Manual GMK6300L
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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.
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 braking 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 forwards to level 5.0.
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.
5.1 Only engine retarder
Connection to the retarder power:
5.2 50% power, engine retarder
5.3 75% power, engine retarder
5.4 100% power, engine retarder
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