Norton 19S - Page 34

These figures are given assuming the tem-
perature of the acid is about 60 ° F.
Each reading should be approximately the
same.
If one cell gives a reading very different
from the rest, it may be that the acid has
been spilled or has leaked from this particular
cell, or there may be a short circuit between
the plates.
This will necessitate its return to a Repair
Depot for rectification.
Wipe the top of the battery to remove all
dirt and water.
Note.
Do not leave the battery in a discharged
condition for any length of time.
If a motor cycle is to be out of use, the
battery must first be fully charged, and after-
wards given a refreshing charge about every
two weeks.
Earthing Connections.
Before disconnecting the battery, note which
terminal is connected to the machine and re-
connect accordingly.
C1arging.
If the previous tests indicate that the battery
is merely discharged, and if the acid level is
correct, the battery must be recharged &om an
external supply.
IOI. HEADLAMP.
The headlamp incorporates a Lucas Light
Unit which embodies a "pre-focus" bulb
ensuring a correct beam without any necessity
for focussing.
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Pit. 24
Liglit Unit-bulb remowl .
Setting.
Check the setting of the lamp. Stand the
machine about 25ft. from a_ light coloured wall
34
and adjust the headlamp position until the
main driving beam is projected straight ahead
and parallel to the ground, the centre of the
beam being the same height as the headlamp
centre.
Bulb Replacement.
To remove the headlamp front, slacken the
screw at the top of the lamp and lift off the
front rim complete with light unit assembly.
The pilot bulb is carried in a small metal plate
in the base of the lamp body. The plate must
be slid out in order to replace the bulb. To
replace " pre - focus " bulbs, twist the back
shell in the centre of the reflector back in
an anti-clockwise direction and pull off. The
bulb may now be removed from the rear of
the reflector. Place the correct bulb in the
holder, engage the projectors on the inside of
the back shell with the slots in the bulb holder,
press home and twist in a clockwise direction.
To replace headlamp front, locate the bottom
of the light unit assembly in the lamp body,
press into position and tighten locking screw.
Note.
It is important that only genuine Lucas
bulbs should be used as replacements in order
to ensure accuracy and correct focussing.
Main bulb Lucas No. 312 6 volt
30/24 watt.
Pilot bulb Lucas No. 988 6 volt 3 watt.
Fig. 25
Tail, Stop and Number Plate Lamp