Section 03: FUEL SYSTEM
PA1593
8
expansion safety margin. A drain plug,
accessible from under the vehicle, is fitted at the
bottom of the tank.
3.1 TANK REMOVAL
DANGER
Park vehicle safely, apply parking brake, stop
engine and set battery master switch(es) to the
OFF position prior to working on the vehicle.
Before working under an air-suspended
vehicle, it is strongly recommended to support
the body at the recommended jacking points.
NOTE
Before removal, the fuel tank should be
completely drained by unscrewing the drain
plug. Ensure that the container used has a
capacity equal to the amount of fuel remaining
in the tank.
1. Open the condenser door and remove the
fuel tank access panel. The rear baggage
compartment fuel tank access panel may
also be removed to facilitate access to
components.
2. Unscrew clamps retaining R.H. side filler
tube to fuel tank and filler neck. Disconnect
tube and remove it.
3. If applicable, unscrew preheater supply line,
preheater return line, auxiliary return line
and/or auxiliary return line from fuel tank
connection-panel.
4. Unscrew engine supply and return lines
from fuel tank connection-panel, identify
them for reinstallation.
5. Disconnect electrical wiring from tank on
connection plate.
DANGER
Before removing the bolts securing the tank
support to the frame, make sure the tank is
supported adequately. Failure to do so could
result in injury as well as damage to the tank.
6. From under the vehicle, on R.H. side,
unscrew the 4 bolts (2 in front, 2 in back)
retaining the tank support to the frame.
7. From under the vehicle, on the L.H. side,
unscrew the 2 bolts (1 in front, 1 in back)
retaining the tank support to the frame.
8. Carefully remove tank from under the
vehicle.
3.2 TANK INSTALLATION
To install tank, simply reverse the "Tank Removal"
procedure.
3.3 FUEL TANK VERIFICATION
Inspect fuel tank from under vehicle for leaks or
fuel traces. If a leak is detected, repair
immediately as per "Polyethylene Fuel Tank
Repair" in this section.
DANGER
Park vehicle safely, apply parking brake, stop
engine and set battery master switch(es) to the
OFF position prior to working on the vehicle.
Before working under an air-suspended
vehicle, it is strongly recommended to support
the body at the recommended jacking points.
3.4 POLYETHYLENE FUEL TANK REPAIR
NOTE
Fuel level must be lower than perforation to
carry out this procedure.
DANGER
Park vehicle safely, apply parking brake, stop
engine and set battery master switch(es) to the
OFF position prior to working on the vehicle.
1. Locate perforation on fuel tank.
2. If necessary, remove fuel tank as per
instructions in this section.
3. Drill perforation with a 23/64" bit. Make sure
drill hole is perfectly round.
4. Insert a screw (Prevost #500196) and a
washer (Prevost #5001244) into anchor nut
(Prevost #500331).
5. Place assembly in drill hole. Tighten screw
by 10 complete turns. Refer to Fig. 9.
6. Apply sealant on head plug (Prevost
#507300) and seal hole with the head plug.
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