Maintenance work on the carrier
7.18 Towbar coupling
7 - 128 3 302 756 en Maintenance manual
GMK6400
16.11.2018
7.18.6 Checking the support ring
Prerequisites – The coupling is closed; à p. 7 - 124.
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 limit
of
H = 14 mm (0,55 in).
7.18.7 Checking the function of the coupling jaw /
Resetting central position
Spare parts
and
tool
– Torque wrench for a torque of 58 Nm (42.7 lbf ft).
Prerequisites – The coupling is closed; à p. 7 - 124.
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