Every 2-3 months, or if the arms become stiff at any time, raise each arm and by means of a brush, match­stick, or other suitable article and apply a drop of thin machine oil, such as sewing machine or typewriter oil as illustrated. Only the merest drop of oil should be used—any excess may affect the working of the operating mechanism. The "Traffi­cators" are kept in the closed position by means of a spring. The arms can be pulled out by hand. If any difficulty is experienced, switch the Trafficator on and then, supporting the arm in a horizontal position, move the switch to the off position.

Replacing a "Trafficator" Bulb.
If at any time, the arm fails to tight up when in operation, raise the arm in the manner previously described and examine the bulb, replacing it if necessary, with one of the same size and wattage as fitted originally. The correct replacement bulbs to use are:—

    12-volt.—Lucas No. 256 (3-watt festoon type).
    6-volt.—Lucas No. 255 (3-watt festoon type).

The methods of replacement are given below.
Do not attempt to remove the bulb holder while the "Trafficator" is switched on, as this may cause a short circuit.