PRONAR T900, Operator'S Manual, Page: 115 / 153

SECTION 5 Pronar T900
5.19
5.3.5 CLEANING THE DRAIN VALVE
DANGER
Release air from the air tank before dismantling drain valve.
Required maintenance actions
Completely reduce pressure in air tanks.
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.
Cleaning valve:
•
every 12 months (before winter period).
5.3.6 CLEANING AND MAINTAINING PNEUMATIC CONDUIT CONNECTIONS
AND PNEUMATIC SOCKETS
Damaged connection body or socket for connecting the second trailer should be replaced. In
the event of damage to cover or seal, change these elements for new reliable elements.
Contact of pneumatic connector seals with oils, grease, petrol etc. may cause damage and
accelerate ageing process.
If the trailer is unhitched from the tractor, connections should be protected by covers or
placed in their designated sockets. Before the winter, it is recommended to preserve the seal
with special preparations (e.g. silicon grease for rubber elements).
DANGER
Unreliable and dirty trailer connections may cause unreliability and faulty functioning of
braking system.