PRONAR T679, Operator'S Manual, Page: 112 / 135

Pronar T679 SECTION 5
5.22
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
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).
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.
Scope of maintenance activities
Release all pressure from the system.
Reduction of pressure is achieved by tilting the drain valve mandrel.
Remove the pneumatic conduit by loosening the nut (2).
Fit the new conduit.
The interior of the conduit should be clean.