Oil
Pressure Gauge
The oil pressure
gauge shows the oil pressure in the engine lubricating
system. 1 does not,
however, show how much oil there is in the crankcase. It
is graduated in kg/sq.cm. or in colour
sectors; red for 0-18 lb/sq.in. ( 0-125 kg/sq.cm ) and
green for 18-100 lb/sq.in ( 1.25-7.0 kg/sq.cm. ).
At normal r.p.m. and load the pressure is to be 40-55
lb/sq.in. ( 3-4 kg/sq.cm. ). Higher pressure
than the above can be caused by all that is too viscid
for the prevailing temperature or by a faulty
reduction valve. If the oil pressure falls to zero or
near to it during running, the engine must be
stopped immediately and the fault traced.
Coolant Thermometer
The thermometer shows the temperature of the coolant
and, consequently, the working
temperature of the engine. it is graduated in deg C or
in colour sectors, white for 32-140 deg F
( 0-60deg C ), green for 140-195deg F ( 60-90deg C ) and
red for 195-230deg F ( 90-110deg C ).
Normal coolant temperature is 160-175deg F ( 70-80deg C
). If the thermometer shows
excessively high temperature for a long period at a
time, this may be due to circulation difficulties
caused by clogged cooling system passages.
Charging Indicator
Lamp
Normally, the
charging indicator lamp is not alight when the engine is
running; this shows that the
battery is being charged. When the lamp lights this
indicates that the battery is discharging, which
is normal when idling. If the lamp lights when running
at higher speeds, there is usually a fault
in the electrical system.
Switch Key
The switch key is
on the instrument panel. The circuit is closed through
the switch when the key
is turned clockwise. Do not forget to switch off the
current when the engine is stopped. Otherwise
the battery will discharge.
Starting Button
The engine is
started electrically by pressing in the starting button
to the left of the starting switch
on the instrument panel. Release the button as soon as
the engine starts.
Instrument Panel
Lighting
On the left-hand
side of the instrument panel there is a switch for the
panel lighting.
Decompression
Device
The principle of
the decompression device is as follows: An eccentric
shaft connected to a lever
depresses the exhaust so that they lift from their seats
and prevent the pistons from producing
compression in the cylinders. The eccentric shaft is
rotated with the help of a handle journaled in
the valve cover. |
