CITROEN 2 CV4 1975 Owner's Manual page 24

Fig. 33
pebble road surfaces, 23 psi (1,6 bar) in front; in sandy area, 15 psi
(1 bar) at front and rear.
Tyre change-around Do not forget to correct the pressure of the spare wheel as soon as
possible after fitting.
Tyre pressures must be checked at least once a month and before
any long journeys since safety depends on correct pressures; these
also have appreciable influence on the life of the tyres. The check
should be carried out when the tyres are cold, before they have been
heated by running: the pressure may in fact be increased by up to 7
psi (0,5 bar) on a loaded vehicle running at high speed.
Keep a check on wheel balancing, especially after a puncture.
Changing the wheels around, which evens out the wear on the five
tyres, should be frequent enough to prevent any appreciable
difference of wear between the two tyres on one axle.
Follow the plan opposite which shows the use of the spare wheel.
Then rest the pressures.Changing a wheel is described here.
Tire Wear Indicators
These are located at regular intervals across the tread and show up
according to localised wear of the engraving when the rubber
reaches a certain degree of wear (see Fig. 34). The tyre concerned
should then be replaced as soon as possible.
Snow Tyres
Fig. 34
125-15 X (M+S) and 135-15 X (M+S) tyres can be fitted with
Tyre wear indicators
studs. In which case, it is necessary to increase the pressures by 3
1 - Position of
psi (0,2 bar). In some countries there are legal requirements on the
indicators
use of studded tyres; local Citroën dealers will supply you with
information on this point.
Battery Maintenance
Check the terminals and the leads for cleanliness. If they are