Maintenance work on the carrier
7.18 Towbar coupling
7 - 120 3 302 719 en Maintenance manual
GMK6300L-1
13.02.2018
7.18.6 Checking the support ring
Prerequisites – The coupling must be closed; à p. 7 - 116.
Checking the
support ring
• Check the support ring (1) at the bottom
of the coupling jaw.
When the trailer is coupled, the draw eyelet
of the trailer must not be in contact with
the lower bushing (2).
Have the support ring changed if:
– The trailer's draw eyelet touches the
lower bushing because of wear or
– The support ring has reached its wear
li
mit
of H = 14 mm (0.55 in)
7.18.7 Checking the function of the coupling jaw/resetting
the middle position.
Spare parts
and tool
– Torque wrench for a torque of 58 Nm (42.7 lbf ft).
Prerequisites – The coupling must be closed;
à p. 7 - 116.
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