Main bulb
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Parking Bulb
Lucas No. 373 6-volt
30/24 watt prefocus (left hand dip).
Lucas No, 312 6-volt
30/24 watt prefocus (vertical dip),
Lucas No- 403 6-volt
35/35 watt prefocus duplo (vertical dip).
Lucas No. 379 6-volt
36/36 watt 3-pin duplo (vertical dip).
Lucas No. 988 3-watt M.C.C.
Setting. The headlamp should be set so that when the machine is carrying
its normal load the driving beam is projected straight ahead and is parallel
with the road surface-
Dipper switch. Every 5,000 miles the moving parts of the dipper switch
should be lubricated with thin machine oil.
Headlamp (Alternator Models). A separate ignition switch is incorpo-
rated in the right side of the headlamp body.
Lucas stop tail lamp (Model 564). The correct size of bulb to be used in
rear lamps' is based on the cubic capacity of the engine. The replacement
bulb for this lamp is Lucas No. 384, 6-volt, 6/18 watt. Small bayonet cap.
Lucas horn (Model HF 1441). Horns are pre-set to give their best per-
formance and, in general, no further adjustment is necessary.
If the horn becomes uncertain in its action, giving only a choking sound,
or does not vibrate, it does not follow that the horn has broken down—
the trouble may be due to a discharged battery, a loose connection, or
short-circuit in the wiring of the horn.
In particular ascertain that the horn-push bracket is in good electrical
contact with the handlebars.
It is also possible that the performance of a horn may be upset by its
mounting becoming loose,
ALTERNATOR Model RM15
The following data applies to three versions of Model RM15, namely,
540, 210, 18, fitted to magneto ignition machines, 047, 534, fitted to coil
ignition machines, and 540, 210, 05, fitted to two-way radio equipped
machines.
Test equipment required.
(1) First-grade moving coil a.c. voltmeter. 0-20 volts.
(2) First-grade moving coil d.c. ammeter. 0-25 amps.
(3) One ohm load resistor (capable of carrying 20 amperes without
overheating).
Test No. 1. For this test, the battery must be in good condition and more
than half charged.
(1) Connect the d.c. ammeter between the battery negative terminal
and the battery main cable.
(2) Start the engine and set it to run at approximately 3,000 r.p.m.
(3) Observe the ammeter readings in each of the positions of the light-
ing switch.
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