battery to be charged by the dynamo. On the other hand, when the engine
speed is low, or the engine is stationary, the cut-out disconnects the
battery from the dynamo, thereby preventing current flowing back from
the battery to the dynamo, a proceeding that would soon cause the battery
to become completely discharged.
The regulator and cut-out are accurately set during manufacture, If,
under normal running, conditions, it is found that the battery is continually
in a low state of charge, or is being constantly over-charged, then the
regulator setting should be checked by a qualified electrician and, if neces-
sary, reset. Whenever possible, this should be carried out by a Lucas-
Service Depot or Agent.
The A.V.C. Unit is retained by two bolts with self-locking nuts. The
self locking nature of the nuts prevents subsequent slacking off. The four
terminals of the A.V.C. Unit are plainly marked by the letters F.A.D.E.
Wires from F and D go to similarly marked terminals on the dynamo. The
A terminal is connected to one of the ammeter terminals and the E ter-
minal is “earthed”.
We specially warn against unskilled meddling with the settings of the
regulator and the cut-out contacts.
Later machines may be fitted with a new A.V.C. Unit type RB-107,
but the foregoing notes will still apply with Che exception of terminal
grouping which will be F.A.E.D.
To remove control box (after 1957). The A.V.C. unit is held in sponge
rubber and housed in a partition at the rear top corner of the tool box.
To remove it, open the box lid, grasp the unit between the fingers and
thumb of one hand, and gently and firmly pull it out. Re-fit with cover
outwards.
The four terminals of the control box are plainly marked by the letters
D.E.A.F. Wires from F and D go to similarly marked terminals on the
dynamo. The A terminal is connected to one of the ammeter terminals
and the E terminal is 'earthed'.
Battery—All Models (MLZ9E). A lead-acid battery Lucas type is used
on all models.
The voltage is 6, the capacity is 12 ampere hours, at the 10 hour rate.
Machines are issued with dry charged batteries, the acid is filled by the
dealer.
All models have the POSITIVE battery terminal connected to 'EARTH'.
To remove the head lamp rim, release the screw retaining the lamp rim
with one hand and support the light unit with the other.
The light unit can then be taken off the lamp.
To refit. Engage bottom tag on lamp rim with the small slit in the shell
and gently force the top of the rim back into the shell, after which re-
tighten the retaining screw on the top of the lamp body.
The main bulb is secured by a bayonet fixing holder which is removed
by turning anti-clockwise.
The pilot bulb is a plug-in or push fit.
The headlamp rim is detachable from the light unit by removing six
spring clips.
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