PRONAR T680, Operator'S Manual, Page: 118 / 147

Pronar T680 SECTION 5
5.20
•
cleaning the air filter (filters),
•
draining water from air tank,
•
cleaning drain valve,
•
cleaning and maintaining pneumatic conduit connections,
DANGER
Do not use the trailer when brake system is out of order.
5.3.2 CHECKING AIR TIGHTNESS AND VISUAL INSPECTION OF PNEUMATIC
SYSTEM
Checking air tightness of pneumatic system
Hitch trailer to tractor.
Immobilise tractor and trailer with parking brake. Place chocks under trailer
rear wheel.
Start tractor in order to supplement air in trailer brake system tank.
In single conduit systems air pressure should amount to approx. 5.8
bar.
In double conduit systems air pressure should amount to approx. 8
bar.
Turn off tractor engine.
Check system components by releasing brake pedal in tractor.
Pay particular attention to conduit connections and brake cylinders.
Repeat the system check with depressed tractor brake pedal.
The help of a second person is required.
In the event of the appearance of leaks, compressed air will escape at the places of damage,
with a characteristic hiss. Lack of system tightness may be detected by covering checked
elements with washing fluid or other foaming preparations, which will not react aggressively
with the system components. It is recommended to use preparations commercially available