Primera BAG0175.3
5.4.2 Uncoupling the brake and supply lines
WARNING
Risk of being crushed, cut, caught or struck by the machine un-
intentionally rolling away when the operating brake is released.
Always uncouple the hose coupling of the supply line (red) first fol-
lowed by the hose coupling of the brake line (yellow).
The operating brake of the machine only moves into the brake posi-
tion when the red hose coupling has been uncoupled.
Always keep to this order, as otherwise the operating brake system
will trip and may set the unbraked machine moving.
When the machine is uncoupled or separated from the trailer, air is
vented from the trailer brake valve supply line. The trailer brake valve
is automatically switched and operates the service brake system in-
dependently of the automatic, load-dependent braking force regulator.
1. Secure the machine against unintentionally rolling away. To do
so use the parking brake and/or wheel chocks.
2. Release supply line coupling head (red).
3. Release brake line coupling head (yellow).
4. Fasten coupling heads in the dummy coupling points.
5. Close tractor coupling head caps.
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