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WHEELS AND TYRES.
How to use the Jack; Correct Inflation
Pressures
W
HENit becomes necessary t6 change a wheel hecause of a puncture
or for any other cause. the firstthing to do is to pull the handbrake
"hard on." The spare wheel must be lifted from the rear of the car.
Before it is used test the air pressure and if it is not up to the correct
figure. use the pump to rectify it. The proper pressures are tabulated
on the next page.
It is important~ have the car on
level ground. With the wheel brace
the three nuts of the wheel to be
removed should be slightly slackened.
but only enough for them to unscrew
freely later. The wheel is tb'en
jacked up.
If it is a rear wheel. the jack
should be put in from the'side, be-
tween the mudwing and the forward
edge of the.tyre, and should be placed
under the rear spring between the two
clips which embrace the spring leaves.
If a froni wheel is to be attended
to, first slacken the nuts by means of
the wheelbrace. Place the jack under
the front axle neaf but not under the
big nut at the end.
The operating bar (which is
stored under the rear seat cushion)
fits into the jack by means of a
square tube and 15secured in that position by a spring loaded ball.
The head of this bar which
engages with the jack must be
pushed well home so that a spring
loaded ball may engage with a slot,
which will prevent the head of the
bar slipping out while the jack is in
use.
The jack should be adjusted as
nearly as possible to the required
height by turning the head round by
hand before using the handle to lift
the car.
To detach the wheel from the
hub remove the three nuts by
H' ",.
How to use the Jack
on the "Seven."
~
"".
".'
The Jack, .howing Extension
16
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.-1,
,
means of the brace; on some models,
including vans. it is not necessary to
remove them entirely. Pull the wheel
outwards about tin. and turn it a
little to the left so that the large hole
will pass over the nut. The wheel can
now be pulled off the hub.
When replacing these slotted
hubs, make sure that the large holes
in the wheel centre are properly fitted
over their pegs, and tighten the wheel
nuts, each only a few turns at a time,
until they are quite tight and secure.
Should difficulty b" experienced
upon the first occasion of removing
the wheel from the hub. the wheel
nuts may be screwed right off. Before
replacing, wipe the outside of the brake drum and inside of the hub
with an oily rag as this will ease removal on future occasions.
". .,
Do not detach nut.. The wheel
will.lide over them.
Care of The Tyres.
The key to economical and efficient tyre service is to maintain the
correct pressures and test your tyres at least weekly. Any loss of air
pressure can be made up with very little effort.
A gauge applied to the valve must be used, for it is seldom possible
to detect under-inflation from the tyres' appearance.
Minimum presssures to which tyres should be inflated are :-
I
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A tyre that loses more than three to four Ibs. per sq. inch in a week
should be regarded as "suspect." First, make sure that a new valve
"inside" is not required. If the tube is punctured make sure before refitting
that the puncturing object is not still embedded in the cover.
It is important that both front tyres be kept at same pressure. If
because of wear or other causes. the steering develops a tendency to wander
or show signs of wobble, the front tyre pressure may temporarily be varied.
17
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Rear Tyres.
Tyre Size.
Front
Tyres.
One or two
Fully
Passengers.
Laden.
4.00-17 (Standard)
22 22 26
4.75-16 (E.L.P.)
20 18 22
4.00-18 (Van)
22
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26
4.75-16 (Van)
24
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26
Lbs. per sq. in.
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