When replacing the brush cover care ni~~st be taken that the cover does
not make contact with dynamo terminal (sympton, no charge).
Starter Motor.
The armature spindles of these machines are fitted with
a pinion which, on rotation, runs into engagement with the geared ring on the
flywheel. Immediately the engine
begins to fire, the pinion is automatically
thrown out of mesh.
If, for any reason, the pinion wheel on the motor does not engage with
thse flywheel te'eth, examine th'e screwed sleeve on the armature spindle to
see that it is free from dust;
if
necessary wash over with paraffin. Occasion-
ally, give it a few drops of thin n~achinse oil.
As in the case
of
th,e dynamo, th'e surface of the commutator must b'e
kept clean and free from oil, brush dust, etc.
The starter is designed for starting the 'engine under normal conditions,
but any urmecessarp or additional loading will considerably diminish the life
of the machine and battery. In order to facilitate starting in cold weath,er,
it is advisable to flood the c:irburetter, and, before using the electric starter,
crank th,e engine over slowly by the starting handle for two or three r,evolu-
tions; this will break the oil film and considerably diminish the load for
starting.
In the event of the ,engin8e refusing to fire after being turned by th'e starter,
make sure that the ignition switch is
"
on."
It is not advisable to use the self starter with the Ignition Lever in the full
advance position.
It is better to put the Ignition Idever half advance and
if
necessary increase the amount of advance while th'e Starter Motor is
spinning the engine. With coil ignition this is not usually necessary.
Battery.
It is of the utmost importance that the batt'ery should receive
regular attention,
as
upon its good condition depends thse satisfactory func-
tioning of the ignition, starting motor, and the lamps.
At least once a fortnight the vent plugs in the top of th'e battery should
be removed, and the level of the acid solution examined.
If necessary, dis-
tilled water (which can be obtained at all chemists and most garages) should
be added to bring the level well above the plates. If, however, acid solution
has been spilled, it should be replaced by a diluted sulphuric acid solution
of
specific gravity 1.320. It is important, when examining the cells, that naked
lights should not be held near the vents, on account of the possible danger
of igniting the gas which is generated by the plates. It is advisabl'e to complete
the inspection by measuring the specific gravity of the acid, as this gives a
very good indication of the state of charge of the battery. An instrument
known as a hydrometer is
employed for this purpose; these can be bought
from your Dealer or from any of the IAucas/Rotax Service Stations.
For the batter! fitted to the
8/35
M.G. Midget the specific gravity
readings will be 1.285-1.300 for a fully charged battery, about
1.210
when half
discharged and about 1.150 wh,en fully discharged.
If one cell gives a reading very different from the rest, it may b,e that
electrolyte has been spilled or has
lleaked from this cell, or there may be a
"
short
"
between the plates. In the latter case, the battery should be
examin,ed as soon as possible by
a
IJucas/Rotax Service Station.
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