Volvo 120 Operating & Service Manual page 22

SERVICING
29 Check the state of charge of the battery
The state of charge of the battery should be checked after every 10 000
km (6 000 miles). The check is carried out with the help of a hydro-
meter, this showing the specific gravity of the electrolyte which varies
with the state of charge. See page 55. When checking the battery, check
also the terminals and terminal bolts to make sure they are well tight-
ened and smeared with rustproofing agent. If necessary, wipe off the
terminals and terminal bolts with a rag or brush them with a wire brush
and apply rustproofing.
30 Check headlight alignment
The alignment of the headlights should be checked in a Volvo workshop
after every 10 000 km (6000 miles). Remember that the section of the
road lit up by the headlights can vary depending on the load in the
vehicle.
Replacement of bulbs
To obtain maximum lighting effect and to forestall the chances of lights
going out, the headlight bulbs should be changed every year, suitably
during the autumn. Some of the bulbs have two functions, for example,
the headlight bulbs which have filaments for both mainbeam and dipped
li ghts. The guide pins on the sockets of these bulbs are either of diffe-
rent thickness or they are staggered so that the bulbs can only be fitted
i n one definite position. Certain makes of bulbs have a "Top" mark on
the socket and this should face upwards.
Replacing the roof light bulb
When replacing the roof light bulb,
the lamp shade is pulled straight out.
When fitting headlight bulbs do not touch
the glass with your fingers. The reason
for this is that grease, oil or any other
i mpurities can be carbonized onto the
bulb and this may damage the deflector.
Replacing the headlight bulbs
•
Loosen the three screws retaining the
ri m with a screwdriver.
•
Pull out the bottom part of the rim slightly
and then lift upwards so that the re-
tainer catch releases its grip. (Do not
pull out the headlight rim so far forwards
that the catch at the top becomes bent,
otherwise water can penetrate into and
damage the reflector.)
•
I t i s not necessary to remove these
screws completely. The insert can be
removed by turning it in an anti-clock-
wise direction.
•
Remove the bulb holder contact and
take off the rubber sleeve. Remove the
spring fixing the lamp holder in the cor-
rect position.
•
The bulb and holder are changed com-
pletely as one unit. When fitting the
bulb holder into the insert, make sure
that the small spring retainer engages in
the notch.
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