INSTRUMENTS AND INDICATORS
Water Temperature
Gauge
(9)
Normal operating temperature
is reached when the needle
registers in the
central sector of the dial. Should the needle
reach the highest mark,
stop the engine immediately, allow it to
cool and check the level of the
coolant
in the radiator.
When the
ignition is
switched on
the
needle moves slowly across its scale,
taking up
to
one
minute
to reach a true rcading.
Oil Pressure Gauge
(10)
The oil pressure relief valve is set to
control the pressure at
65-75 lb. per sq. in. at 2,000 r.p.m. with normal
oil temperatures.
i.e.,
about ?O'C. During sustained high speed operation,
th
resulting increase in oil temperature may
cause
the
oil pressur
to drop. This will have no detdmental effects
providing it do(
not fall below 30 lb. per
sq.
in.
Severe operating conditions, such as competition work, ma
cause the oil pressure to fall below 30 p.s.i., indicating that the
o
temperature is excessive. Under these circumstances,
an o
cooler kit is recommended to ensure that a maximum
sump o
temperature of 125"C. is not
exceeded.
Fuel
Gauge
(ll)
The fuel
gauge indicates the approximate
contents
of tt
fuel
tank. When the ignition is switched on, the needle mov(
slowly across its
scale taking up
to
one
minute to reach
a
stead
reading which
it will maintain, regardless of vehicle movemen
unril the ignition is
switched
otr
Ammeter
(13)
The ammeter is calibrated in amperes and indicates the ra1
of battery charge and discharge. The charging rate is indicat€
when
the
pointer
moves to the left-hand side of
"zero",
an
discharge.
b) movement to the right.
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