PRONAR T386, Руководство оператора, Страница: 118 / 162

Pronar T386 SECTION 5
5.8
Loosen wheel nuts according to sequence given in figure (5.4).
Place a lifting jack and raise the trailer to a sufficient height so that the wheel
to be replaced does not touch the ground.
The lifting jack should have sufficient lifting capacity and should be
technically reliable.
The lifting jack must be positioned on a level and hard surface so as to
prevent sinking into the ground or relocating the jack during lifting.
If necessary, use proper backing plates in order to reduce unit
pressure of the jack's base on the ground and prevent its sinking into
the ground.
Dismount wheel.
Wheel mounting
Clean axle pins and nuts of contamination.
Do not grease thread of nuts and pins.
Check condition of pins and nuts, if necessary replace them.
Place wheel on hub, tighten nuts so that wheel rim tightly fits the hub.
Lower trailer, tighten nuts according to recommended torque and given
sequence.
TIP
Wheel nuts should be tightened using a torque of 450 Nm - nuts M22x1.5.
Tightening nuts
Nuts should be tightened gradually diagonally, (in several stages, until obtaining the required
tightening torque) using a torque spanner. If a torque spanner is not available, one may use
an ordinary spanner. The arm of the spanner (L) figure (5.3) should be selected according to
the weight of the person (F) tightening the nut. Remember that this method of tightening is
not as accurate as the use of a torque spanner.