PRONAR T680, Operator'S Manual, Page: 122 / 147

Pronar T680 SECTION 5
5.24
The compressed air in the tank causes the removal of water to the
exterior.
After release of the valve stem, the valve should automatically close and stop
airflow from the tank.
If the valve stem resists returning to its position, then the whole drain
valve must be unscrewed and cleaned or replaced (if it is damaged) -
see section 5.3.5.
5.3.5 CLEANING THE DRAIN VALVE
DANGER
Release air from the air tank before dismantling drain valve.
Required maintenance actions
Cleaning valve:
•
every 12 months (before winter period).
Completely reduce pressure in air tank.
Reduction of pressure in tank is achieved by tilting the drain valve
stem.
Unscrew valve.
Clean the valve, blow it with compressed air.
Change copper seal.
Screw in valve, fill tank with air and check tank tightness.
5.3.6 CLEANING AND MAINTAINING PNEUMATIC CONDUIT CONNECTIONS
AND PNEUMATIC SOCKETS
DANGER
Unreliable and dirty trailer connections may cause unreliability and faulty functioning of
braking system.