Chevrolet Light - Page 7

natural for the ammeter to show discharge. When the engine
is running at medium speed and most of the electrical equip..
ment is turned off the ammeter should show a slight charge,
depending on the state of charge of the battery. Should the
ammeter show discharge when the truck is being driven at
medium speed, trouble is indicated in the charging system
and the battery will soon become discharged.
Oil Pressure Gauge. This instrument is in the lower right side
of
the instrument group (fig. 3). The oU pressure gauge indi-
cates whether or - not the oil pump is working, but does not
indicate the amount of oil in the crankcase.
The pressure gauge reading is controlled by the engine
speed and the oil being used. A low reading is normal at idling
speeds with a warm engine and light oil; however, as the
engine speed is increased the hand should move over near the
"IS" mark. In cold weather (especially with heavy oil) the
hand may move over to ' the "30" mark at comparatively low
engine speeds. This indicates that the
oil is too heavy to properly lubricate
the engine.
NOTE: Do not accel erate the engine
excessive ly until the oil is suffi.
dently warm to permit a l ower pres-
su~. If the gauge does not show
any pressme, stop the engine im-
mediately and determine the cause.
Speedometer. The speedometer is
located to the right of the instru-
ment group (fig .. A). As the vehicle
flg.4-Sp .. dom.'.,
is driven, the hand moves around the dial indicating the speed
of the vehicle in miles-per-hour. The figures visible through
the opening near the center of the speedometer indicate the
total mileage the truck has been driven. This part of the
speedometer is known as the odometer.
fIg. S_/gnitionSwl'd.
Switches
Ignition Switch. 'The ignition switch
is located near the bottom of the in-
strument panel to the right of · the
steering column (fig. 5).
'5 '