Fuel Tank; Polyethylene Fuel Tank; Tank Removal (Polyethylene); Fuel Tank Verification (Polyethylene) - PREVOST H3-41 Maintenance Manual

SECTION 03 : FUEL SYSTEM
MAINTENANCE
Replace preheater fuel filter at the intervals
specified by the Lubrication And Servicing
Schedule in Section 24: LUBRICATION &
SERVICING.
5.

FUEL TANK

5.1 POLYETHYLENE FUEL TANK

All H3 series vehicles are equipped with a high-
density cross-link polyethylene fuel tank with a
legal capacity (corresponding to 95% of gross
capacity) of 222 US gallons / 840 liters. The tank
is located just forward of the last baggage
compartment, between the A/C condenser and
evaporator. Fuel filling access doors on both
sides of vehicle provide direct access to filler
necks; offering the added advantage of refueling
from either side of vehicle.
X3 series are equipped with a high-density
cross-link polyethylene fuel tank with a legal
capacity (corresponding to 95% of
capacity) of 208 US gallons (787 liters). The fuel
filling access door is located on the R.H. side of
vehicle providing easy fuel filling.
A pressure relief valve on the fuel tank
connection-panel relieves high-pressure buildup
and an overflow tube allows offset air in the tank
to escape during filling. For 95% of the tank
volume, 5% of tank inside space is kept filled
with air with no exit opening, allowing for a fuel
expansion safety margin.
accessible from under the vehicle, is fitted at the
bottom of the tank.

5.2 TANK REMOVAL (POLYETHYLENE)

WARNING
Park vehicle safely, apply parking brake, stop
engine and set battery master switch(es) to
the OFF position before working on the
vehicle.
Before working under
vehicle, it is strongly recommended to support
the body at the recommended jacking points.
12
PA1621 Maintenance Manual All Series | Revised May 2018
gross
A drain plug,
an air-suspended
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. On H3 series vehicles only, unscrew clamps
retaining L.H. side filler tube to the fuel tank,
then disconnect tube and remove it.
3. Unscrew clamps retaining R.H. side filler
tube to fuel tank and filler neck. Disconnect
tube and remove it.
4. If applicable, unscrew preheater supply line,
preheater return line, auxiliary return line
and/or auxiliary return line from fuel tank
connection-panel.
5. Unscrew engine supply and return lines from
fuel tank connection-panel, identify them for
reinstallation.
6. Disconnect electrical wiring from tank on
connection plate.
FIGURE 11: 222 US GALLONS FUEL TANK
03048