PRONAR 663/4 SILO, Operator'S Manual, Page: 115 / 135

SECTION 5 Pronar T663/4 T663/4 SILO
5.23
Press tractor brake pedal several times
If trailer is equipped with hydraulic brake system.
Check cylinders and hydraulic conduits for tightness.
If oil is found on hydraulic cylinder body, check origin of leak. Inspect hydraulic seals when
hydraulic cylinder is completely extended. Minimum leaks are permissible with symptoms of
"sweating", however in the event of noticing leaks in the form of "droplets" stop using the
trailer until faults are remedied. If unreliability is evident in brake cylinders do NOT use trailer
with damaged system until faults are remedied.
Checking tightness:
•
after the first week of use,
•
every 12 months of use.
5.4.3 CHECKING TECHNICAL CONDITION OF HYDRAULIC COUPLERS AND
SOCKETS.
Hydraulic couplers and sockets designed for connection with second trailer must be in good
working condition and kept clean. Each time before connecting check if sockets in tractor or
connections of second trailer are maintained in good working condition. Tractor and trailer
hydraulic systems are sensitive to the presence of permanent contamination, which may
cause damage to precision system components (contamination may cause scratching of
hydraulic valves, abrasion of piston surfaces etc.)
Inspection of hydraulic couplers and sockets:
•
each time before connecting trailer to tractor or before connecting the
second trailer.
5.4.4 REPLACEMENT OF HYDRAULIC CONDUITS
Rubber hydraulic conduits must be replaced every 4 years regardless of their technical
condition. This should be entrusted to specialised workshops.