Chevrolet 10 Series 1970 Service Manual page 499

General D e s c rip tio n ...............
Service O p e ra tio n s..................
Draining Tank ....................
Gauge U nit or Fuel Strainer
Fuel T a n k .............................
A ll cab m odel trucks (except T ilt Cabs) have a 21 ga l­
lon (17.5 gallons Im p eria l M easure) capacity (approx.)
fuel tank mounted behind the seat within the cab. The
tank is constructed of two ste e l sections, seam welded,
together. The f ille r neck extends through the left side of
the cab, at a convenient height from the ground. Excep­
tional stiffn ess is secured by the combination of the
welded flanges and depressed ribs in both the fron t and
re a r halves. The tank is bolted to the re a r of the cab
and to the flo o r panel.
Fram e mounted tanks are located on the right side of
the chassis and lay lengthwise outside the fram e side r a il
on Forw ard Control, 1-1/2, and 2 ton models.
On 1 ton m odels, the above inform ation also applies
except that the tank is mounted on the outside of the le ft
fra m e side ra il. A strong mounting of two m etal straps
anchor these tanks to mounting brackets which are bolted
to the fra m e side m em ber.
On 1/2 and 3/4 ton conventional and 4-w heel d rive
m odels the tank is located to the re a r of the axle and be­
tween the side ra ils and envelopes the forw a rd edge of the
spare tire . These tanks are supported by one or two steel
straps which are held at eith er end by a hook into the side
ra il. M etal to m etal contact between tank and brackets
o r straps is prevented by the use of anti-squeak m aterial.
D R A IN IN G FUEL TANK
If the fuel tank does not incorporate a drain plug, it
w ill be necessary to siphon fuel fro m
draining is needed. T h e
recommended.
SECTION 8
FUEL TANK AND EXHAUST
CONTENTS OF THIS SECTION
Fuel Tank (E x cep t w ith evaporative emission c o n t r o l ) ..................
Fuel Tank (w ith evaporative emission c o n t r o l ) ...................... ..
Exhaust S y s te m ....................................................................................
FUEL TANK
(EXCEPT EVAPORATIVE EM ISSIO N CONTROL)
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GENERAL DESCRIPTION
SERVICE OPERATIONS
the tank when
follow in g procedure
INDEX
Fuel Line S e r v i c e ..............................................................................
Frame Mounted - Fuel F ilter ..........................................................
Fuel Line Retainer Clip ..................................................................
Special T o o l s .........................................................................................
Upper and lo w er f ille r necks v a ry as to size , length and
shape, depending on m odel requirem ents.
are treated so that rust w ill not fo rm and get into the
fuel system . L o w er f i l l e r necks are fir s t bolted or r iv ­
eted to the tank, except on cab m odels, and then sweat
sold ered in place to elim inate any p ossib ility of leakage
at this point.
A ll tanks are equipped with a vented f ille r neck cap.
A ll 40 through 60 S eries trucks incorporate a pressu re
r e lie f valve.
The fuel pickup pipe is built in tegrally with the tank
gauge unit, located at the top of the tank. A la rge area,
fin e-m esh screen is located on the bottom of the fuel
pickup pipe. This screen is designed to prevent the en­
trance of d irt or w ater into the fuel system , and operates
with a self-clean in g action.
Fram e mounted tanks consist of an upper and lo w er
half, each with a wide
pressed into the tank halves. The two tank sections are
seam welded at the flange around the entire tank to as­
sure leakproof construction.
secured by the combination of the welded flanges and de­
p ressed ribs in both upper and low er tank sections. Baf­
fle plates are incorporated to provide additional stiffness
and to prevent the surging of gasoline within the tank.
1. Obtain approxim ately 10 feet of 3/8" I.D. hose and
cut a flap-type s lit 18" from one end. Make this
cut in the direction of the shorter end of hose (See
Figure 1).
is 2. Insert a sm all pipe nipple (sligh tly la rg e r O.D. than
the hose I.D .) into the opposite end of hose.
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These necks
flange and b affles which are
Exceptional stiffn ess is
CHEVROLET TRUCK SERVICE MANUAL
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