Renault Premium DXi 11, Service Manual

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C4-51
Driving
Drawbar rigid and tractor vehicles
This safety valve acts simultaneously on the
rear axle of the tractor and on the trailer.
Release
Lift up the locking sleeve and move the lever
from position (2) to position (1). The warning
light (S) goes out.
Application
Move the lever from position (1) to position (2)
(negotiate the hard spot). make sure the lever is
locked in position (2). The warning light (S)
comes on.
Before leaving the vehicle, move the lever to
the "
Test " position to ensure efficiency of the
parking brake.
Test
Press the lever and move it from position (2) to position (3). This position releases the trailer
brake and holds the road rig on the tractor brake. This position serves to ensure that the trac-
tor can alone hold the entire immobilized vehicle.
As soon as the lever is released, it returns automatically to position (2), i.e. to the parking
position.
If your road rig has a gross train/combination weight (GTW/GCW) of 60 tonnes, the parking
brake also acts on the front axle of the tractor vehicle.