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Maintain the correct inflation pressure by weekly tests with a gauge applied directly
to the valve. The maintenance of correct tyre pressure is a large factor in tyre life and
the steering of the car.
Tyres lose their pressure due to diffusion, even though there is no porosity or leakage
CORRECT TYRE PRESSURES (Fully-laden condition)
Front—20 lb./sq. in (1.4 kg./sq. cm.)
Rear—25 lb./sq. in. (1.76 kg./sq. cm.)
It is assumed that the above pressures are maintained by weekly attention. If the owner is
able to check the pressure only every two or three weeks, then it is advisable to inflate the
tyres by an additional 2 lbs./sq. in. On the other hand, it is permissible for a more
GENERAL UPKEEP—Care of Tyres
CARE OF TYRES
due to a puncture or faulty valve. The loss
varies from 1 to 3 lbs. per sq. in. per week and
must be made up if the tyre is to give proper
service.
Examine the tyres occasionally for flints or
other road matter which may have become
embedded in the tread. If the car is driven
where tacks or short nails may be picked up,
these also may be found buried in the tread. If
these are left in they may eventually work
through the cover and puncture the tube. Fill
up any large holes with a suitable compound,
obtainable for the purpose.
Oil should not be allowed to get on the tyres.
If any should accidentally do so, clean off by
using petrol sparingly.
Do not drive over sharp edged kerbs or
"bump" them with the side of the tyre, as this
is liable to fracture the cotton tyre casing, and
in the latter case upset the front wheel
alignment or even bend the wheel "out of
truth."
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