Iran Tractor ITM 470, Operators Instruction Book

Page: 96 / 122

4
Maintenance and adjustment
89
Check and adjust the front and rear
tyre pressures and inspect the tread and
side walls for damage (Fig. 52). Check the
pressure when the tyres are cold.
The correct pressure for any tyre on
the tractor is found by weighing the loaded
axle and then referring to the load/infla-
tion tables for that tyre in Section 5, page
112.
NOTE
If the tyres are ballasted with calcium
chloride and/or water solution, a special
tyre gauge should be used as the solu-
tion will corrode the standard type of
gauge.
1. The tyre pressures listed in Section
5 can be used in safety, at all times,
without danger of sidewall rippling. In
certain conditions the pressures may
be lowered, where the loads are light.
Higher tyre pressures should be used
for hillside ploughing or if the tractor
is to be used on the road for a length
of time. DO NOT exceed the maximum
recommended pressures.
2. Keep oil, grease and strong alkaline or
acid fertilizers away from tyres to pre-
vent deterioration of the rubber.
3. Have any small sidewall or tread splits
or cuts re-vulcanized 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,
consult your ITMCo. Dealer.
5. Water ballasting details are quoted
in Table 5 for a few of the many tyre
options available for these tractors.
These figures are given as a guide only.
For specific details for your tractor if
not shown, or if you wish to change the
tyre sizes, see your ITMCo. Dealer who
will have full tyre range specifications
and recommended pressures supplied
by the tyre manufacturers.
Radial ply drive tyres
If you are unable to weigh the trac-
tor axles to determine the correct tyre
inflation pressures the following guide-
line pressures can be used in firm surface
conditions with correctly ballasted trac-
tors (see Table 4).
For front IMPLEMENT applications,
front tyre pressures should be increased
to 1,6 bar (23 lbf/in2).
For front LOADER application only,
in cyclic operation, front tyre pressures
should be increased to 2,0 bar (30 lbf/in2).
Mounted equipment Trailed equipment Transport
Front
1,0 bar
(15 lbf/in2)
1,0 bar
(15 lbf/in2)
1,0 bar
(15 lbf/in2)
Rear
1,6 bar
(23 Ibf/i n2)
1,0 bar
(15 lbf/in2)
1,6 bar
(23 Ibf/in2)
Table 4:
NOTE
For exact inflation pressure require-
ment, axle loads need to be measured
and the load/inflation charts on page 111
need to be applied.
• For hillside operation, DO NOT use in -
flation pressures lower than 1 bar (15
lbf/in2).
• A correctly inflated radial tyre un -
der full load should have a profile as
shown in Fig. 53.