Maintenance work on the carrier
7.19 Towbar coupling
07.12.2017
Maintenance manual 3 302 649 en 7 - 127
GMK4090
7.19.2 Checking the bearing
Prerequisites – The coupling is closed; à p. 7 - 126.
Checking the
bearing
• Check the bearing of the towbar coupling by
vigorously shaking it up and down and in the
longitudinal direction (arrows). Hold the tow-
bar coupling at the top and bottom of the
coupling head and not by the coupling jaw.
The vertical play at the coupling head must be
no more than 3 mm (0.1 in).
G
Risk of injury
Ensure that the towbar coupling is closed for the following work (lever
points downwards). The lever may otherwise come down with great force
and cause serious injury to your hand.
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