Chevrolet 30 Series 1967 Service Manual page 447

General Description...............
Service O p e ra t io n s ...............
Draining T a n k ..................
Gauge Unit or Fuel Strainer
Fuel Tank...........................
All cab model trucks (except Tilt Cabs) have a 21 gal­
lon capacity (approx.) fuel tank mounted behind the seat
within the cab. The tank is constructed of two steel
sections, seam welded together. The filler neck extends
through the left side of the cab, at a convenient height
from the ground. Exceptional stiffness is secured by the
combination of the welded flanges and depressed ribs in
both the front and rear halves.
rear of the cab and to the floor panel.
Frame mounted tanks are located on the right side of
the chassis and lay lengthwise outside the frame side rail
on Forward Control, 1-1/2, and 2 ton models.
On 1 ton models, the above information also applies
except that the tank is mounted on the outside of the left
side frame rail. A strong mounting of two metal straps
anchor these tanks to mounting brackets which are bolted
to the frame side member.
On 1/2 and 3/4 ton conventional and 4-wheel drive
models the tank is located to the rear of the axle and be­
tween the side rails and envelopes the forward edge of the
spare tire. These tanks are supported by a single steel
strap which is held at either end by a hook into the side
rail. Metal to metal contact between tank and brackets
or straps is prevented by the use of anti-squeak material.
The Chevy Van Fuel Tank is 20 gallon capacity (ap­
proximate), with left hand side fill and is mounted between
the frame rails behind the rear axle.
place by two metal straps attached individually to the
underbody at each end. The straps hinge at the forward
end and secure the tank at the rear with an adjustable bolt
and nut assembly (fig. ).
6
DRAINING THE TANK
The following procedure is < recommended for con-
• structing a siphon hose and draining the tank:
1. Obtain an to 10 foot length of 3/8", or slightly less,
8
I.D. hose and cut a flap type slit 18" from one end.
See Figure 1.
NOTE:
Hose with larger than 3/8", or slightly
SECTION 8
FUEL TANK AND EXHAUST
CONTENTS OF THIS SECTION
Fuel Tank ........................................................................
Exhaust System ..................................................................
FUEL TANK
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8-2
GENERAL DESCRIPTION
The tank is bolted to the
The tank is held in
SERVICE OPERATIONS
INDEX
Filler Neck Assembly - Chevy V a n ...........................
Fuel Line Service
Fuel F i l t e r ..................................................................
Special Tools ..................................................................
Fuel tank filler caps and neck assemblies conform to
the latest SAE Standards for filler caps and related filler
neck cams. These units are not directly interchangeable
with past models for service replacement.
Upper and lower filler necks vary as to size, length and
shape, depending on model requirements.
are treated so that rust will not form and get into the
fuel system. Lower filler necks are first bolted or riv­
eted to the tank except on cab models, and then sweat
soldered in place to eliminate any possibility of leakage
at this point.
All tanks are equipped with a vented filler neck cap.
All 40 through 60 Series trucks incorporate a pressure
relief valve which reduces fire hazard by eliminating an
open vent to the atmosphere and preventing spillage in
case of overturn.
The fuel pickup pipe is built integrally with the tank
gauge unit, located at the top of the tank in line with
safety recommendations. A large area, fine-mesh screen
located on the bottom of the fuel pickup pipe. This screen
is designed to prevent the entrance of dirt or water into
the fuel system, and operates with a self-cleaning action.
Frame mounted tanks consist of an upper and lower
half, each with a wide flange and baffles which are
pressed into the tank halves. The two tank sections are
seam welded at the flange around the entire tank to a s­
sure leakproof construction. Exceptional stiffness is
secured by the combination of the welded flanges and de­
pressed ribs in both upper and lower tank sections. Baf­
fle plates are incorporated to provide additional stiffness
and to prevent the surging of gasoline within the tank.
less, I.D. is not recommended as it is quite dif­
ficult to erect and maintain a siphon using this
method with a larger hose.
2. Insert a small nipple (at least 1/8" larger O.D. than
the hose I.D.) into opposite end of hose from slit.
3. Lift or jack rear of vehicle so that tank is at least
one foot higher than normal.
4. Insert nipple end of hose into tank until it strikes
bottom.
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These necks
CHEVROLET TRUCK SERVICE M ANUAL
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