El Paso herald. (El Paso, Tex.) 1901-1931, 1920-08-28
The HeruId;S AUTO Quiz


coil Of the vibrator type is TO connect
an ammeter in the primary circuit,
I attaching one ammeter terminal 70
the terminal on the coil and the other
ammerer connection TO the artery
| termfnal Remove temporarily the
usual connection Use the common
six volt storage battery or four good
dry cells To test, separate the sec
| ondary terminals a quarter OF an incn
| and adjust the vibrator OF the coll
/ until he ammeter reads about one
| and one half amperes- The coll IN
| good condition should give continu-
/ Gus flow OF blue sparks OF good vol
! rme. Pitted vibrator points viii not
/ give a constant spark. A bad con-
/ nection within the coll, or poor
I terminal viii give an unsteady read
L ing at the ammeter. II the coil Is
| short circuired. the amreter will show
] a reading greatly in excess Of normal
A vibrator spring that Is too strong
| or not strong enough viii also cause
/ Inefficient sparkling
. To adjust a front wheel roller
bearing turn the bearing up tight by
means Of the adjusting and locking
l nuts spin the wheel 70 overcome
/ bacI<lash. then back off the locking
| nut and loosen slightly the adjusting
nut until barely perceptible play is
noticeable in the bearing. Then
tighten the lock nut There should
be just enough play to allow the
valve OF The tire or some other slight
weight TO slowly turn the wheel back
and forth, until finally the weight
comes 10 stop at the wheels lowest
2. automobile. brakes for rear wheels
are divided into three general classes
| internal expanding band Internal ex-
banding shoes and external contract
/ ing band. When brakes are applied.
the first mentioned brake band OF
T L. q the
inside OF a brake drum; the second
has heavier shoes which are op-
Grated by a cam. expanding against
the drum the third brake Is a druu
with a thin band contracting against
ont the outside Both bands and
shoes have a friction lining OF some
asbestos composition which IS more
heat and wear resisting than metal, |
although some brakes Of the expand /
ing shoe type are made with no lin
ing. Another type known as the !
transmission brake Is located on the {
main driving shaft near the trans /
mission. II Is similarly constructed !
and usually used for emergency, op-
Grating by a hand lever.
T. The easiest Kay 70 apply paint /
10 a radiator without a brush Is 70 /
purchase or make a spraying outfit /
insuring q better Job vita less trou- !
bic The outfit consists OF a can, |
such as a gallon gasoline can. an air /
pump and a hose attached to the I
pump and passing through the can /
near the top. Another tube extends I
from the air hose down into the liquid /
within the can, and Is placed with its I
upper end outside the can and close TO 4
the mouth OF the air tube Thus when 4
the pump handle Is worked up and \
down the liquid Is drawn to the mouth /
OF the air hose. and Is forced IA q /
spray from the hose under pressure /
OF air from the pump
s. The cause OF vibrating IN speed
ometer indicators may be loose unions /
az either end OF the driving shaft,
fiber gears not meshinE properly, too 1
sharp a bend in the shaft OF lack OF
lubricant The latter Is the chief \
cause OF noise in the speedometer
drive. Wien the speedometer does
not indicate look for loose connection.
broken shaft links, stripped gears or
gears not engaged
6. To tine the valves, one method
e 70 mesh the timing gears, with the
marked tooth OF one gear exactly in
line with that OF the corresponding
tooth Of the gear It engages Another
way Is BY using the fly wheel when
should be marked for top dead center
OF each piston's stroke, also the posi-
ton when each valve opens and closes,
As an example. on a four cylinder
engine, the inlet valve opens at five
degrees past top center, and closes at
4EEEEEc past EAAAAAA AaAANlAa a - Z
exhaust valve opens at 40 degrees be-
fore bottom center and closes at seven
degrees past top center.
Z. The firing order Of a four cylin-
der IS either one. three, four, two OF
one, two, four, three. It Is possible
tive order, one, two, three, four BY
constructing a special crankshafr but
rocking motion and excessive vibra-
ton would result.
s. All Of the gasoline vapor which
is drawn into the cylinders should be
mixture is TOO rich il Is not entirely
consumed by each explosion, resulting
IN the forming OF carbon within the
cylinder OF condensing and mixing
with The oil IN the crankoase and IN
creasing the wear on bearings and
rings.
9. Low gravity gasoline contains
more heat units than that OF high
gravity, but is more apt TO deposit
carbon, is slower OF combustion when
cold and causes harder starting Of a
motor. High gravity fuel gives a
more powerful, quicker blow at The
OF power stroke of a pis-
ton, but this power dies consider
ably before the end OF the stroke The
fuel Of low gravity. although Of not
as violent a force at the beginning OF
power stroke continues a more even
pressure for q longer proportion OF
the stroke With The proper carbu-
rotor adjustment, low gravity fuel is
better for slow or medium speeds.
and high gravity for higher speeds
where power is not the main requisite.
10. Engine misfiring on high speed
may be due 10 the following magnetic
troubles: a short circuit, which may
exist unnoJiced on low speed. loose
breaker points adjusted
too close or a sticking breaker arm.
1920. Thompson Feature
servicel