Tyres
4. If air is added to the tyre, remove the gauge
and re-attach it before reading the
pressure. Failure to do so may result in an
inaccurate reading.
TYRE PRESSURE COMPENSATION
FOR LOW AMBIENT TEMPERATURE
CHANGES
A colder ambient local temperature will reduce
pressure within the tyre. An effect is to
decrease sidewall height and to increase tyre
shoulder wear with the potential for tyre failure.
Vehicle dynamics could also be adversely
affected.
5. If the tyre pressure is too high, remove the
gauge and allow air out of the tyre by
pressing the centre of the valve. Refit the
gauge to the valve and check the pressure.
6. Repeat the process, adding or removing air
as required, until the correct tyre pressure
is reached.
Tyre pressures can be adjusted to compensate
before the start of the journey. Alternatively,
tyre pressures can be adjusted when the area
of lower ambient temperature is reached.
7. Refit the valve cap.
TYRE VALVES
In this situation, the vehicle must be left in the
ambient local temperature for at least one hour
before tyre pressure is adjusted.
Keep the valve caps screwed down firmly to
prevent water or dirt entering the valve. Check
the valves for leaks when checking the tyre
pressures.
To compensate for colder ambient
temperatures, tyre pressures should be
increased by 0.14 bar (2 psi, 14 kPa) for each
10°C (20°F) decrease.
PUNCTURED TYRES
Do not drive the vehicle with a
punctured tyre. Even if the punctured
tyre has not deflated, it is unsafe to
use, as the tyre may deflate suddenly
at any time.
Note: Ensure that correct tyre pressures are
maintained when moving to areas of differing
ambient temperature.
TYRE PRESSURE COMPENSATION -
HIGH AMBIENT TEMPERATURES
REPLACEMENT TYRES
Do not fit cross ply tyres.
Tyre pressure temperature compensation
Ambient tempera- Pressure compensa-
Do not fit tubed tyres.
Do not rotate tyres around the vehicle.
ture °C (°F)
tion bar (psi, kPa)
If the use of tyres not recommended by
Land Rover is unavoidable, ensure
that you read and fully comply with the
tyre manufacturer’s instructions.
20 (68)
use label
30 (86)
+ 0.14 (2, 14)
+ 0.28 (4, 28)
+ 0.41 (6, 41)
40 (104)
50 (122)
Ideally, tyres should be replaced in sets of 4. If
this is not possible, replace the tyres in pairs
(both front or both rear). When tyres are
replaced, the wheels should always be
re-balanced and alignment checked.
213
