Ford T Series User Manual

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TH E F 0 R D :'\1 .\ >; U A I,
I-tow is the Carburetor
adjusted?
Answer No. 45
The usual me thod of regulating the carburetor is to start the motor.
advancing the throttl e le ver to about the sixth notch, with the spark
retarded to about the fourth notch. The flow of gasoline should
now be cut off by screwing the needle valve down to the right until
the engine begins to misfire, th en gradually increase the gasoline
feed by opening the needle valve until the motor picks up and
reaches its highest speed and no trace of black smoke comes from
the exhaust. Whenev er it is necessary to turn the adjusting needl e
down more than a quarter turn below its normal position, the l ock
nut on top of the -:arbu r eto r at the point through which needle passe s
shov.ld
first be loosened, as otherw i se it is impossible to tell when the
needle is turned down in its seat too far. Turning the needle down
too tightly will result in i ts b eco ming grooved and the seat enlarged .
When these parts are damaged it is difficult to maintain proper
adjustment of th e carburetor. Having determined the point
where the motor runs at its maximum speed, the needle valve lock
nut should be tightened to pre ve nt the adjustment being disturbed .
For average running, a lean mixture will give better results than a
rich one.
Why does wate r
clog the Carburetor?
Answer No . 46
Th e presence of water in the carburetor or gasoline tank, even in
small amounts, will prevent easy start i ng a nd the motor will misfir e
and stop. As water is heavier than gasoline it settles to the bottom of
the tank a nd into thesedimentbulba l ong wit h other foreig n matt er .
As
it is difficu lt nowadays to get gasoline abso lut ely free from imp ur i-
ties, especia ll ywater, it is advisable to fre quently drain the sedimen t
bulb und er the gasoline tank. D uring cold weather the water which
accumu l ates in the sediment bulb is likely to freeze and prevent the
flow of gasoline through th e pi9e leading to the carburetor. Should
anything of this kind happen it is possible to open the gasoline line by
wrapping a cloth around the sediment bulb and keeping it saturat ed
with hot water for a sho rt tim e. Then the water should be drained
off. In eve nt the water gets down into the carburetor and freezes, th e
same treatme nt may be applied.
What makes the
Carburetor leak?
Answer No. 47
Th e flow of gasoline entering the carburetor through. the feed pipe is
automatically re . gu l ated by the flo at n eed le raising and l owering in it s
seat. Should any particl e of dirt become lodged in the seat, which
prev ents the need le from closing, the gasoline will overflow in the
bowl of the carburetor and l eak out upon the ground.
Wh en there is dirt
in the Carburetor - what?
Answer No. 48
The spraying nozz le of the carburetor having a very small opening , a
minut e particle of grit or other foreign matter will clog up the orifi ce,
a nd result: motor will beg in to misfire and slow down as soon as it
has atta in ed any considerable speed. This is acco unted for by the
T 11 f. C l\ S 0 L I N E S Y S 'l j! :'\!
25
fact that at high speeds the in creased suction' will draw the particles
of dust, etc., into the nozzle. B y opening th e, valve need le half a turn
and giving the throttl e lever two or three quick pulls the dirt or sedi-
ment will often be drawn thro ugh, whe n_ t!je needle m ay be turned
back to its original place. If thi s does not accomplish the purpose , the
carburetor should be drained.
lf Engine runs too fast or: cho · kes
with throttle retarded-what?
I
Answer No. 49
If the engine run s too fast with throttlef ully retarded unscrew the car-
buretor throttle lev er adjusting screw until the engine idlesatsuitable
speed. If the motor chokes and stops when thrott le is fully retarded,
the adjusting screw should be screwed in until it strikes the boss, pre-
venting the throttle from closing too far. When proper adjustmenthas
been made,tightenlock -s c re w so th at adjustment will not be disturbed.
What is the purpose of
the Hot Air Pipe?
Answer No. 50
It takes the hot air from around the exhaust pipe and conducts it to
the carburetor-where the h eat facili tates the vaporizing of the
gaso line. It is usually advis ab le to re move this pipe in the hot
season - but it is an absolutely necess ary feature during cold weather.
What is th e purpose of th e
Cork Float?
A nswer No. 51
I t automatically controls th e flow of the gasoline into the carburetor.
If it floats too low, starting will be difficult; if too high, the ca rb ur etor
will flood and le ak. A cork float which has become fuel soaked should
be removed and replac ed by a new one or thoroughly dri ed and then
given a couple of coats of shella c varnish to make it waterproof.
Should Priming Rod be used in Answer 7\ 'o . 5.2
cranking when Motor is warm? 1 Vl
No. The carbu r etor do es not ordin a rily r equire priming when the
motor is warm, and cranking with the rod pull ed out is apt to "floo d"
the engi ne with an over -r ich mixture of gas, which does not readily
explode. This naturally causes difficulty in starting. If you should
accidentally flood the engine, tum the ca rb ur et or adjusting needle
down (to the right) until it seats; then turn the engine ov er a few
times with the starting crank in ord er to exhaus t the rich gas. As
soon as the motor starts, tum back the needle (to th e l eft) and re-
adjust the ca rb ur etor.

Ford T Series Specifications

General

Brand	Ford
Model	T Series
Category	Trucks
Language	English