Manitowoc GROVE GMK4090 Maintenance Manual page 213

Checking for cor-
rect functioning
H
Resetting the
middle position
Maintenance manual
GMK4090
If the lever does not automatically engage with the coupling jaw, the middle
position must be re-adjusted;
The coupling jaw must be able to move easily
in both directions.
•
Hold the coupling jaw (1) pressed slightly to
the left or right.
•
Open the coupling (position A) and let the
coupling jaw go.
The lever must automatically lock the coupling
jaw in the middle position. The coupling jaw is
locked when the coupling can no longer move
to the side.
à
p. 7 - 131.
•
Open the coupling (lever (1) pointing
upwards) and loosen the screws (2).
•
Push the coupling jaw to the side until the
lever engages.
•
Tighten the screws – torque 58 Nm
(42.7 lbf ft).
•
Check the function of the coupling jaw;
à
p. 7 - 130.
3 302 649 en
Maintenance work on the carrier
7.19 Towbar coupling
7 - 131