Airtightnes Control And Visual Inspection - PRONAR T400 Operator's Manual

Pronar T400
5.3.2

AIRTIGHTNES CONTROL AND VISUAL INSPECTION

Checking the tightness of pneumatic systems
Hitch the trailer to the tractor.
Immobilize tractor and trailer with parking brake. Additionally, place chocks
under the wheel of the trailer.
Start the tractor to refill the air in trailer braking system tank.
Turn off tractor engine.
Check system components with the tractor brake pedal released.
Repeat the system check with the tractor brake pedal pressed.
In case of a leak, the compressed air will leak out in places of damage with a characteristic
hissing. The system leak can also be detected by coating the controlled elements with
washing liquid or other foaming agent, which will not aggressively affect the elements of the
installation. It is recommended to use commercially available agents intended for leak
detection. Damaged elements should be replaced or handed over for repair. If there is a leak
around the connections, the user can tighten the connector on their own. If air still leaks,
replace the connector or seal components with new ones.
Checking the installation for leaks:
Visual assessment of the installation
When checking for leaks, pay attention to the technical condition and degree of cleanliness of
the system components. Contact of pneumatic conduits, seals etc. with oil, grease, gasoline
In two-line systems, the air pressure should be around 8 bar.
Pay special attention to cable connections and brake cylinders.
Help of another person is required.
• after covering the first 1,000 km,
• every time after repair or replacement of system components,
• once a year.
5.18
CHAPTER 5