PRONAR T663/1, Operator'S Manual, Page: 103 / 135

SECTION 5 Pronar T663/1 T663/1 SILO
5.9
Check the wheel nut tightening:
•
after first use,
•
after first travel with load,
•
after travelling the first 1,000 km,
•
every six months use or every 25,000 km.
In the event of intensive work check the nut tightening at least every 100 km. The above
actions should be repeated individually if a wheel has been removed from the wheel axle.
ATTENTION
Wheel nuts may not be tightened with impact wrench because of danger of exceeding
permissible tightening torque, the consequence of which may be breaking the thread
connection or breaking off the hub pin.
The greatest precision is achieved using a torque spanner. Before commencing work,
ensure that correct tightening torque value is set.
TABLE 5.1 Spanner arm
WHEEL TIGHTENING TORQUE BODY WEIGHT (F) ARM LENGTH (L)
[Nm] [kg] [m]
90 0.30
77 0.35
67 0.40
270
60 0.45
5.2.6 CHECKING AIR PRESSURE IN TYRES, EVALUATING TECHNICAL
CONDITION OF TYRES AND STEEL WHEELS
Air pressure in tyres should be checked each time after changing a spare wheel and at least
once a month. In the event of intensive use, air pressure in tyres should be checked more
frequently. During this time, the trailer must be unloaded. Checking should be done before
travelling when tyres are not heated, or after an extended period of parking.