PRONAR T679/5, Operator'S Manual, Page: 92 / 116

PRONAR T679/5 SECTION 5
5.20
•
cleaning and maintaining pneumatic conduit connections,
5.3.2 CHECKING TIGHTNESS
Checking air tightness of pneumatic system
Hitch the trailer to tractor. Park machine and tractor on level surface.
Prevent the trailer from rolling by placing chocks under the wheels. Immobilise
tractor and trailer with parking brake.
Start the tractor in order to supplement air in the trailer braking system tank.
In double conduit systems air pressure should amount to approx. 6.5
bar.
In single conduit systems air pressure should amount to approx. 5.8
bar.
Turn off tractor engine.
Check system components after releasing brake pedal in tractor.
Give particular attention to conduit connections and brake cylinders.
Repeat system check with depressed tractor brake pedal.
The help of a second person is required.
INSPECTION
•
After travelling the first 1,000 km.
•
Each time after making repairs or changing system components,
•
Every 12 months.
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 also detected by covering
checked elements with washing fluid or other foaming preparations, which will not react
aggressively with system components. It is recommended to supply preparations
commercially available designed to facilitate detecting air leaks. Damaged components
should be replaced or repaired. If leaks appear at connections then tighten the connections. If
air continues to escape replace connection component or seal.