Chevrolet 10 1971 Series Chassis Service Manual page 327

V ^ W IT H O U T FUEL FILTER
2. Disconnect fuel feed line and wiring from gauge unit.
3. Unlock gauge cam ring using Tool J-23346 and re­
move gauge unit from tank.
On some chassis mounted tanks, re­
NOTE:
move gauge attaching screws and then disengage
unit from tank.
4. Replace or clean strainer with compressed air as
required.
5. Install gauge unit using reverse of removal proce­
dure.
G A S CAP IDENTIFICATION
The easiest way to identify the correct filler neck gas
cap for trucks with the Evaporation Control System
(ECS), is to check for the words "pressure-vacuum" on
the inside of the cap. Also check for proper gas cap fit.
If gas cap replacement is required, always check ve­
hicle identification and order by part number.
FUEL TANKS
The optional auxiliary fuel tank installs
NOTE:
in the same manner as center mounted tanks.
It is connected to the cab mounted tank as shown
in Figure 3.
Fig. 3— Auxiliary Fuel lank Installation
CAB MOUNTED TANKS (Fig. 2)
Removal and Installation
1. Remove seat back hold-down bolts and tilt seat back
forward.
2. Remove tank cover if so equipped.
3. Drain tank.
4. Disconnect fuel line, meter wire and ground lead.
5. Remove lug wrench and lug wrench mount.
6. Remove seven bolts and fasteners securing tank to
cab.
7. Remove tank from cab simultaneously disengaging
filler neck from the rubber grommet in the cab
opening.
8. Remove meter assembly from fuel tank using Tool
J-23346.
9. To install, reverse removal procedure.
' /a A N D 3 /4 TON CHASSIS CENTER A N D AUXILIARY
MOUNTED TANKS (Figs. 3, 4 and 5)
Removal and Installation
1. Drain tank.
2. Raise vehicle on hoist.
3. Unclamp filler neck and vent tube hose.
4. Unclamp gauge unit hose at frame end.
5. Support tank and remove support strap(s).
FUEL TANK AND EXHAUST SYSTEMS 8-3
W IT H FUEL FILTER
CHEVROLET CHASSIS SERVICE MANUAL