2009 JAGUAR XF All

219
Wheels and tyres

The following procedure should be used to
check and adjust the tyres pressures.
1.Remove the valve cap.
2. Firmly attach a tyre pressure gauge/inflator
to the valve.
3. Read the tyre pressure from the gauge,
and add air if required.
4. If air is added to the tyre, remove the gauge
and re-attach it be fore reading the
pressure. Failure to do so may result in an
inaccurate reading.
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 a dding or removing air
as required until the correct tyre pressure
is reached.
7. Refit the valve cap.
Note: It is an offence in certain countries to
drive a vehicle with incorrect tyre pressures.
Note: It is the driver's responsibility to ensure
that the tyre pressures are correct.
Tyre valves
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.
Pressure compensation for ambient
temperature changes
If the intended journey will take the vehicle into
an area where the ambien t local temperature is
known to be lower than the journey start point,
tyre pressure under-i nflation could occur. 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.
In order to minimise this effect, 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.
In this situation, the vehicle must be left in the
ambient local temperature for a least one hour
before tyre pressu re is adjusted.
To compensate for colder ambient
temperatures, tyre pressures should be
increased by 0.14 bar (2lbf/in², 14 kPa) for
each 10°C (20°F) decrease.
Note: Ensure that correct tyre pressures are
maintained when moving to areas of differing
ambient temperature.
The Tyre Pressure M onitoring system (TPM
system) may issue a warning if the
under-inflation becomes significant. When
driving through variable climatic conditions the
TPM system warnings may be intermittent.
E95181

Wheels and tyres
220

Tyre pressure compensation chart - high
ambient temperatures
Tyre pressures during long term vehicle
storage
To minimise the possibility and effects of flat
spots during storage, the tyres may be inflated
to the maximum pressure indicated on the tyre
wall.
Note: Before using the st ored vehicle on the
road again, ensure that correct tyre pressures
are restored.
Flat spots
If the vehicle is stati onary for a long period,
when the ambient temperature is high, the
tyres may form flat spots. When the vehicle is
driven, these flat spots will cause a vibration
which will steadily disappear as the tyres warm
up and regain their original shape. In order to minimise flat spotting, the tyre
pressures can be increa
sed. Tyre pressures
should be increased by 0.14 bar/14 kPa (2
lbf/in²) for each 10°C (20°F) temperature
increase above 20°C (68°F)
Long term storage
Flat spotting can be minimised during long
term storage, by increasing the tyre pressures
to the maximum indicated on the tyre sidewall.
Note: The tyre pressures s hould be reduced to
the correct pressure before the vehicle is
driven.
Tyre wear
Good driving practise will improve the mileage
you obtain from your tyres, and avoid
unnecessary damage.
• Always ensure that the tyre pressures are
correctly adjusted.
• Always observe the posted speed limits,
and advisory speeds for bends.
• Avoid pulling away quickly, or hard
acceleration.
• Avoid making fast turns or braking
sharply.
• Wherever possible, avoid potholes, or
obstacles on the road.
• Do not drive up kerbs, or rub the tyres
against them when parking.
Tyre pressure temperature compensation
Ambient
temperature -
°C (°F) Pressure
compensation -
bar (lbf/in², kPa)
20 (68) use placard label
30 (86) + 0.14 (2, 14)
40 (104) + 0.28 (4, 28)
50 (122) + 0.41 (6, 41)
E80322

221
Wheels and tyres

Wear indicators
When the tread has worn down to
approximately 2 mm, wear indicators start to
appear at the surface of the tread pattern. This
produces a continuous band of rubber across
the tread as a visual indicator.
To maintain performance and grip the tyre
must be replaced as soon as the wear indicator
becomes visible. Sooner, if legislation requires
replacement at a greater tread depth.
Note: Tread depth should be checked
regularly, in some case more frequently than
the service intervals. For advice on checking
tyres contact your Dealer/Authorised repairer
or a tyre dealer.
Age degradation
Tyres degrade over time due to the effects of
ultraviolet light, extreme temperatures, high
loads, and environmen tal conditions. It is
recommended that tyres are replaced at least
every six years, but they may require
replacement more frequently.
Jaguar recommends that even if unused, the
spare tyre be replaced at the same time as the
four road tyres.
Punctured tyres
Tyre checks
Not all punctures result in the tyre deflating
immediately. Therefore, it is important to check
the tyres for damage and foreign objects,
regularly.
When driving, if a sudden vibration, or change
to the vehicle's hand ling is noticed, reduce
speed immediately. Do not brake hard, or make
any sudden manoeuvres or direction changes.
Drive slowly to an area off the main highway
and stop the vehicle.
Note: Driving the vehicle to a safe area may
cause damage to th e punctured tyre, but
occupant safety is far more important.
Inspect the tyres for signs of punctures,
damage or under inflati on. If any damage or
deformity is detected, the tyre should be
replaced. If a spare tyre is not available, then
the vehicle should be reco vered to a tyre repair
centre, or Dealer/Approved repairer.
WARNING
Wear indicators show the minimum
tread depth recommended by the
manufacturers. Tyres which have
worn to this point will have reduced grip and
poor water displacement characteristics.
CAUTION
If tread wear is uneve n across a tyre, or
the tyre wears excessively, the vehicle
should be checked by your Dealer/Authorised
Repairer as soon as possible.
E91698
WARNING
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. See TYRE REPAIR KIT (page 229).

Wheels and tyres
222

Replacement tyres
Ideally, tyres should be replaced in sets of four.
If this is not possible, replace the tyres in pairs
(front and rear). When tyres are replaced, the
wheels should always be re-balanced and
alignment checked.
The correct tyre specification for your vehicle
can be found on the tyre information label.
Directional tyres
Directional tyres are designed to operate
correctly when rotating forwards (when the
vehicle is travelling forwards).
Typical direction indicators
WARNINGS
Do not fit cross-ply tyres.
Do not fit tubed tyres.
Do not swap tyres around the vehicle.
Tyres bed in to the specific
characteristics of each wheel
position. Swapping them around may affect
the vehicle's handling and traction.
Always fit replacement tyres of the
same type, and wher ever possible of
the same make and tread pattern.
Replacement wheels should be
genuine Jaguar pa rts. This will
maintain the designed driving
characteristics.
If the use of tyres not recommended
by Jaguar is unavoidable, ensure that
you read, and fully comply with, the
tyre manufacturers inst ructions. Failure to do
so, may lead to tyre failure due to incorrect
fitment or use.
E95182

223
Wheels and tyres

USING WINTER TYRES
Winter tyres are more suitable during extremes
of low temperatures, snow and ice and will
considerably improve the vehicle’s handling
during these conditions.
Do not exceed 240 km/h (150 mph) when
using Jaguar approved winter tyres.
Winter tyres must be fitted to all four wheels.
Approved winter tyre sizes
Front :
• Dunlop Wintersport M3 - 235/55R17 99H,
245/45R18 96V, 245/45R18 100V,
245/40R19 98V.
• W240 Pirelli Sotto Zero - 245/45R18 100V,
245/40R19 98V, 255/35R20 97V
Rear:
• Dunlop Wintersport M3 - 235/55R17 99H,
245/45R18 96V, 245/45R18 100V,
245/40R19 98V.
• W240 Pirelli Sotto Zero - 245/45R18 100V,
245/40R19 98V, 285/30R20 99V
Winter tyre pressures
USING SNOW CHAINS
Snow chains, of the recommended type, can
only be fitted to rear wheels. They should not
be used on temporary use spare wheels.
You should contact your Dealer/Authorised
Repairer for details and availability of approved
snow chains.
The maximum speed when using snow chains
is 50 km/h (30 mph).
Remove the snow chains immediately the
roads are clear of snow.
Ensure the fitting instructions supplied with the
snow chains are kept in a safe place, for
example, with this literature pack.
Note: When using snow chains, select
JaguarDrive Control Winter mode with DSC
switched on.
CAUTION
Tyres with an all season icon or M+S
have a level of winter performance and
need not be replaced.
Up to 240 km/h (150 mph)
Front 2.0 bar (30 lbf/in², 207 kPa)
Rear 2.3 bar (33 lbf/in², 230 kPa)
CAUTION
It is essential that only snow chains of
the recommended type are fitted, other
snow chains may cause damage to the vehicle.

Wheels and tyres
224

RUN FLAT TYRES
Run-flat tyres can be identified by the lettering
RSC on the sidewall. The tyre construction
utilises a specially reinforced sidewall, which
allows the vehicle to be driven at restricted
speeds, even when the tyre is depressurised.
Run-flat tyres can only be fitted to special rims,
constructed for ru n-flat tyre use.
A tyre pressure monitoring system is
mandatory when the vehicle is fitted with
run-flat tyres. See TYRE PRESSURE
MONITORING SYSTEM (page 234).
If the tyre has deflated, the vehicle should be
driven with caution, as handling characteristics
will be different compared to a fully inflated
tyre.
If the vehicle is fully la den with passengers and
luggage, the maximum di stance that can be
completed on a fully deflated tyre, is
approximately 80 kilo metres (50 miles).
Stop immediately if the tyre construction
begins to break down or if the tyre dislodges
from the wheel rim. Typi cally, this will be
accompanied by excessive vibration.
A tyre driven in a defl ated condition must be
replaced as s oon as possible. Vehicles fitted with run-flat tyres are not fitted
with a spare wheel or jacking equipment.
Therefore, run-flat tyre
s should be replaced
with the same type of tyre.
TOOL KIT
Tool kit contents
1. Jack.
2. Wheel brace.
3. Chock.
4. Locking wheel nut adaptor.
5. Towing eye.
Note: When returning the tool kit to its stowage
position, hook the T-bar of the clamp over the
jack handle, to se cure in position.
Note: The jack requi res occasional
maintenance. Examine the jack for wear,
damage or corrosion and lubricate the moving
parts.
WARNING
If a run-flat tyre is deflated, maximum
vehicle speed must not exceed
80 km/h (50 mph).
E91708
WARNING
After use, the tool kit should be
returned to the under floor storage
area and correctly stowed. Do not
leave the tool kit or it s components loose in the
storage area, as they can prove hazardous
during an impact or sudden manoeuvre.
E95183
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1
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225
Wheels and tyres

CHANGING A ROAD WHEEL
If a wheel change is required, pull off the road
completely. Park on ground which is as level
and solid as possible. Ensure that the vehicle is
clear of any objects that will obstruct the safe
removal of the wheel. Switch on hazard
warning lamps and, where legally required,
display the warning triangle.
Regular maintenance of tyres contributes not
only to safety, but to the designed function of
the vehicle. Road-holdi ng, steering and braking
are especially vulnerable to incorrectly
pressurised, badly fitted or worn tyres.
Tyres of the correct size and type, but of
different make can have widely varying
characteristics. It is therefore recommended
that Jaguar approved tyres are fitted to all
wheels.
Temporary use spare wheel
Observe the following wa rnings before using
the wheel:
WARNINGS
Always ensure replacement tyres
have the correct rating and
specifications (e.g. load index, size,
speed rating) for your vehicle.
When using tyres other than those
recommended by Jaguar, do not
exceed the speed capacity
recommended by the manufacturer.
Wheels are extremely heavy. Take
care when lifting and particularly
when removing and replacing a wheel
in its storage position in the luggage
compartment.
CAUTION
Ultra high performance tyres. This
vehicle is equipped with an Ultra High
Performance (UHP) tyre and wheel
combination designed to give maximum dry
road performance with consideration for
aquaplaning resistan ce. UHP tyres have
performance enhancing soft rubber tread
compound. If driven aggressively they may
suffer rapid tread wear and a shorter life than
can be expected from other tyre types. This
wheel and tyre comb ination is more
susceptible to damage from road hazards.
Do not use this combination for driving on
snow or ice. High perf ormance tyres must be
replaced with winter tyres when weather
conditions dictate.
WARNINGS
Note the temporary use spare wheel
warning label. Adhere to instructions
on the label. Failure to comply can be
dangerous.
When a temporary use spare wheel is
fitted, drive with caution and replace
with the specified wheel and tyre as
soon as possible.
Do not fit more than one temporary
use spare wheel and tyre assembly at
one time.
The temporary use spare wheel must
be inflated to 4.2 bar (60 lbf/in²,
420 kPa) and cannot be repaired.
Temporary use spare wheel,
maximum speed is 80 km/h
(50 mph).

227
Wheels and tyres

Wheel changing safety
Before raising the vehicle, or changing a wheel
ensure that you read, and comply with the
following warnings.
WARNINGS
Always find a safe place to stop, off
the highway and away from traffic.
Ensure that the vehicle is on firm level
ground.
Disconnect traile r/caravan from
vehicle.
Switch on the hazard warning lamps.
Ensure that all passengers, and
animals, are out of the vehicle and in
a safe place away from the highway.
Place a warning triangle at a suitable
distance behind th e vehicle, facing
towards oncoming traffic.
Ensure that the front wheels are in the
straight ahead position, and engage
the steering lock.
Apply the parking br ake, and engage
Park (P).
Ensure that the jack is on firm level
ground.
Never place anything between the
jack and the ground, or the jack and
the vehicle.
When one rear wheel is lifted off the
ground the selection P (Park) position
will not prevent the vehicle from
moving and possibly slipping off the jack as
the park brake only operates on the rear
wheels.
Do not start or run the engine while
the vehicle is supported only by a
jack.
The jack is designed for use when
changing a wheel only. Never work
beneath the vehicle with the jack as
the only means of s upport - use vehicle
support stands.
Always chock the wheel diagonally
opposite the wheel to be changed,
using the wheel chock supplied in the
tool kit. Chock the front of a front wheel, or the
rear of a rear wheel.
If jacking the vehicle on a slight slope
is unavoidable, place chocks on the
downhill side of the two opposite
wheels. An additional chock will be
needed.
Take care when lifting the spare
wheel, and removing the punctured
wheel. The wheels are heavy, and can
cause injuries if not handled
correctly.
Remove the spare wheel prior to
jacking the vehicle. To avoid
destabilising the vehicle when raised.
Take care when loosening the wheel
nuts. The wheel brace may slip off if
not properly attached, and the wheel
nuts may give way suddenly. Either
unexpected movement ma y cause an injury.
WARNINGS