Trip Meter; Temperature Gauge - Volvo 121 Servicing

DESCRIPTION
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Temperature gauge

The temperature gauge shows the temperature of the cooling system and
thus indicates the working temperature of the engine. The indicator on
this gauge should remain within the green marking. If it should show an
excessively high temperature for a long time, this can depend upon the
fact that the channels in the cooling system are blocked and circulation
is thus being hindered. In such cases the cooling system should be cleaned
(see page 40).
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Battery charging control lamp
This lamp lights up when the battery is discharging, this being normal at
i dling speed. If you accelerate a little, this lamp should go out. Should
the lamp light up while you are driving, this generally means that there
is some fault in the electrical system or that the fan belt is not sufficient-
ly tensioned and is slipping on the pulley, thereby causing poor charging.
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Trip meter

This trip meter, which is graduated in tenths of a mile, can be used to
measure even short distances. The meter can be reset to zero by means of
a twist knob placed under the instrument panel to the left of the steering
column. The knob is turned first to the right and then back to the left
again.
4 Speedometer
The speedometer has a horizontal indicator, the right hand point showing
the speed at which you are travelling. Since the length of the red strip is
proportional to the speed, this is in itself a safety factor - the more red
you can see, the more dangerous your speed.
7 Mileometer
The mileometer shows the total distance covered in miles. At a reading of
99 999 miles the mechanism returns to zero and starts to go round again.
8 Oil pressure warning lamp
When you switch on the ignition, this lamp should light up and then go
out again when the engine has been started. Should the lamp light up
while you are driving, the engine should be stopped immediately and the
cause for this determined. In most cases it means that the oil level is too
low. After hard driving it may happen that the warning lamp lights
when the engine goes down to idling speed. This is normal providing that
it goes out again when the engine speed is increased.
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