PRONAR T669XL, Operator'S Manual, Page: 112 / 135

Pronar T669XL, Pronar T700XL SECTION 5
5.26
Cleaning valve:
•
every 12 months (before winter period).
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.
Damaged connection body or socket for connecting the second trailer should be replaced. In
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 period it is recommended to preserve
the seal with special preparations (e.g. silicon grease for rubber elements).
Each time before hitching the machine, inspect technical condition and cleanness of
connectors and sockets in tractor. If necessary, clean or repair tractor sockets.
Inspecting trailer connections:
•
connection should be inspected every time before connecting trailer
to tractor or second trailer.
5.3.7 REPLACEMENT OF PNEUMATIC CONDUIT
Pneumatic conduits should be replaced when permanently deformed, cut or frayed.
Push-in fittings are used for connecting conduits with pneumatic system components. The
fittings enable simple, fast and tight connection by pushing the conduits in. If leaks appear at