PRONAR PT512, Operator'S Manual

Page: 105 / 139

CHAPTER 5 Pronar PT512
5.9
Checking the tightening of axle wheels:
•
after first use,
•
after first travel with load,
•
after first 1000 km,
•
per 6 months of operation or 25,000 kilometers.
In the event of intensive work checking the nut tightening should be done at least every
10,000 km. All procedures should be repeated if a wheel has been removed from the axle.
ATTENTION
Axle 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 or
breaking off the hub pin.
The greatest precision is achieved by use of a torque spanner. Before commencing work,
ensure that correct tightening torque value is set.
TABLE 5.1
Spanner arm selection
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 CONTROL OF AIR PRESSURE, EVALUATING TECHNICAL CONDITION
OF TIRES AND STEEL WHEELS
The tire pressure should be checked each time after changing spare wheel and not less than
every month. In case of intensive use it is recommended to check air pressure more
frequently. During this time the trailer must be unloaded. Control should be done before
travelling and when tires are not heated, or after an extended period of parking.