Iran Tractor ITM 475, Operators Instruction Book

Page: 84 / 118

4
Maintenance and adjustment
77
Front wheel hubs (Fig. 48)
Check the front hub adjustment
every 500 hours.
Fig.48: Front hub filler plug.
2
1
If the front hub requires adjustment,
proceed as follows:
1. Raise the wheel off the ground and re-
move the hub cap.
2. Remove the split pin (1) and tighten
the castellated nut (2) to a torque of
80 Nm (60 lbf ft), then slacken off the
nut to the nearest pin hole to give the
correct end float. Fit a new split pin.
3. Refit the hub cap. Grease the hub until
clean grease comes out past the seals
at the back of the wheel.
Tyres (Fig. 49)
Check tyre pressures every 100
hours.
Warning
Tyre tread and ply rating or load
index must match. Do not fit a radial one
side and a crossply on the other. Check
that the tyre pressures are correct for
the particular operation to be performed.
These simple rules, if followed carefully,
will ensure maximum tyre life.
Fig. 49:
Check and adjust the front and rear
tyre pressure and inspect the tread and
side walls for damage (Fig. 49).
Note
If the tyres are ballasted with calcium
chloride/water solution, a special tyre
gauge should be used as the solution will
corrode the standard type of gauge.
1. The tyre pressures listed are maxima
and can be used in safety, at all times,
without danger of sidewall rippling. In
certain conditions the pressures may
be lowered, particularly where the
loads are light resulting in the tyre
treads failing to self clean. If the tyre
pressures are reduced, have someone
observe the tractor whilst working.
Rippling of the sidewalls can cause
rapid and severe tyre damage.
2. Keep oil, grease and strong alkaline or
acid fertilisers away from tyres to pre-
vent deterioration of the rubber.
3. Have any small sidewall or tread splits
or cuts re-vulcanised as soon after
they occur as possible. This extends
the life of the tyre.
4. If bolt-on weights are fitted, raise the
pressures to suit the weight fitted,