Manitowoc Grove GMK4100L-1 Operating Manual page 296

Driving
5.8 Towing a trailer
Coupling the
trailer
G
H
5 - 82
Risk of injury when the automatic closing device is triggered
Do not put your hand into the coupling jaw when the towbar coupling is
open.
This may activate the automatic closing device, causing the cotter pin to
move down with great force, seriously injuring your hand.
Make sure you check the prescribed condition of the coupling after each
coupling procedure.
•
Open the towbar coupling.
Push the lever (1) up until it latches into
place.
•
Check whether the coupling jaw (2) is stable.
It may not be allowed to move to the left or
the right when the towbar coupling is open.
•
Carefully drive the truck crane backwards so
that the towbar of the trailer is pushed into
the coupling jaw.
The towbar coupling closes automatically, and
the lever (1) swings downwards.
The pin (1) may no longer protrude from the
guide bushing after the coupling procedure.
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GMK4100L-1