PRONAR T743, Operator'S Manual

Page: 143 / 150

Pronar T743 SECTION 5
5.44
Emergency release of diaphragm actuator
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Immobilise trailer by placing wheel chocks under the wheels,
•
Insert tensioning bolt (2) into rear opening of the diaphragm actuator (1),
•
Turn the bolt 90°,
•
Install washer (4) and screw nut (3) on,
•
Tighten the nut until resistance is felt,
•
Repeat the above steps for other actuators.
In order to return to actuator normal operation mode, undo nut (3) and take tensioning bolt (2)
out of the actuator. After completion of the activities, place the bolt together with other
elements in the actuator holder (5). Secure the opening in the actuator body with a plastic
nut.
DANGER
Exercise caution while working. During putting the actuator spring under tension, the
trailer is not immobilised with parking brake. That is why chocks must be placed under
the trailer wheels in order to secure the trailer against rolling.
The actuator may be repaired only in an authorised service centre.
Do NOT travel with unreliable brake system.