Tank Installation; Fuel Tank Verification; Polyethylene Fuel Tank Repair - PREVOST H3-41 Maintenance Manual

8. 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.
9. Carefully remove tank from under the
vehicle.

6.2 TANK INSTALLATION

Tank installation is the reverse of removal.
NOTE
Fastening of rubber flap must always be on
top, in line with clamp screw.
NOTE
Insert check valve assembly in right-side filler
hose, use hose clamp to fix it. Repeat with left
side filler hose on H3 series vehicles.
NOTE
When reinstalling lines, use Loctite 567 type
thread sealant on line fittings.
WARNING
For proper assembly, check connections and
fasteners for tightness.
FIGURE 13: FUEL TANK RETENTION
For each fuel tank retainers (Figure 13):
1. Clean nuts and stud threads.
2. Apply a Loctite 242 type thread adhesive on
stud threads.
3. Fix the retainers to the tank platform. Tighten
the nuts to compress the spring completely
and then loosen 3 turns.
03019
PA1615 Maintenance Manual All Series
SECTION 03 : FUEL SYSTEM
4. Lift tank assembly and fasten tank support to
vehicle.
TORQUE: 55 lb-ft (75 Nm)

6.3 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.
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 an air-suspended
vehicle, it is strongly recommended to support
the body at the recommended jacking points.

6.4 POLYETHYLENE FUEL TANK REPAIR

NOTE
Fuel level must be lower than perforation to
carry out this procedure.
WARNING
Park vehicle safely, apply parking brake, stop
engine and set battery master switches to the
OFF position before 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 drilled hole. Tighten screw
by 10 complete turns. Refer to Figure 14.
6. Apply sealant on
#507300) and seal hole with the head plug.
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Section 03 revised September 2016
head plug (Prevost
13