Iran Tractor ITM 470, Operators Instruction Book

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4
Maintenance and adjustment
91
Fig. 55:
• DO NOT hit a rim or tyre with a ham -
mer when the assembly is inflated.
• NEVER use a tube in a tyre larger - or
smaller - than the one for which it was
designed.
• NEVER install tubes that have buckled
or creased.
• NEVER rework, weld, heat or braze
damaged rims.
Water ballasting (Fig. 56)
WARNING
When mixing the ballast solution it is
imperative the calcium chloride flakes
are added to the water and the solu-
tion stirred until the calcium chloride is
dissolved. Never add water to calcium
chloride. If the flakes should contact the
eyes, wash the eyes immediately with
clean, COLD water for at least five min-
utes. See a doctor as soon as possible.
Filling the front and rear tyres with
liquid ballast is a convenient method of
adding weight to secure more traction and
reduce slippage and tread wear. Either
cast wheel weights can be added or the
tyres can be filled with a water/calcium
chloride solution to 75% of the tyre vol-
ume.
Where freezing temperatures never
occur, plain water can be used, but the
weight added will be about 20% less than
the calcium chloride solution. Where anti-
freeze protection is needed, use the rec-
ommended mixture of commercial calci-
um chloride and water (see Table 5).
Fig. 56:
1
2
5
3
4
1. Air.
2. Water coming in.
3. Water supply hose.
4. Vent tube.
5.Filling adaptor.
Mixing the solution
Prepare the calcium chloride mixture in