Freightliner Cascadia. Instruction - page 28
1.
Shut down the engine, apply the parking brake,
and chock the tires.
2.
Check the fuel level in the fuel filter. Replace the
fuel/water separator element only when the filter
element is completely covered. If the fuel level
has reached the top of the filter element, follow
the procedure below to replace the element.
NOTE: In the event of an emergency, when the
filter needs replacement but a Davco filter is not
available for the Fuel Pro 382, a temporary filter
can be used; see the procedure under the
heading "Emergency Temporary Filter Replace-
ment, Fuel Pro 382."
3.
Put a clean receptacle under the fuel/water sepa-
rator and attach a piece of hose to the drain
valve, to direct fuel into the receptacle.
The drain valve has a 1/2-inch (12.7-mm) pipe;
use a hose with a 1/2-inch pipe thread to fit cor-
rectly.
4.
Remove the vent cap (
, Item 4) and open
the drain valve (
, Item 1) to drain the fuel
completely, then close the drain valve.
5.
Using a DAVCO Collar Wrench (
), remove
the clear cover and collar.
NOTE: Broken vent cap and collar warranty
claims will not be accepted if any tool other than
a DAVCO Collar Wrench is used for removal.
During installation, the vent cap and collar are
5
4
3
1
2
06/25/97
f470147
6
7
11
10
9
8
1.
Mounting Head
2.
Fuel Primer Pump
3.
Vent Plug
4.
Bowl O-Ring
5.
Bowl Gasket
6.
Bowl Probe Plug
7.
Water Sensor Probe
8.
Heater Connector
9.
Drain Plug
10. Sight Bowl
11. Filter Element
Fig. 1, Alliance Fuel/Water Separator
f470506b
05/05/2009
4
1
3
5
2
6
1.
Drain Valve
2.
Lower Housing
3.
Clear Cover
4.
Vent Cap
5.
Collar
6.
Inlet Port/Check Valve
Fig. 2, DAVCO Fuel/Water Separator (Fuel Pro 382
Shown)
02/16/2009
f470277
VENT CAP
FOR REMOVAL OF TOP COLLAR ONLY
Fig. 3, DAVCO Collar Wrench
Fuel
47
47/2
to be hand-tightened only, not tightened with a
wrench. Use part number 482017 on Fuel Pro
482 units; part number 380134 on Fuel Pro 382
units.
6.
Remove the filter, cover O-ring, and vent cap
O-ring. Dispose of them in an environmentally
acceptable manner. See
or
7.
Clean all threads and sealing surfaces very thor-
oughly. Even a small amount of dirt will prevent
the fuel/water separator from sealing, and an air
leak may result.
8.
On Fuel Pro 382 units, install the grommet on
the bottom of the new filter.
9.
Install the new filter and grommet assembly and
cover O-ring on the housing.
10. Install the clear cover and the collar. Hand-
tighten the collar.
11. Prime the system
11.1
Ensure that the drain valve is closed.
11.2
Fill the housing to the top with clean die-
sel fuel.
11.3
Install and hand-tighten the vent cap
O-ring and vent cap.
11.4
Start the engine. When the lubricating oil
reaches its normal operating pressure,
increase engine speed to high idle for
one to two minutes to purge air from the
system.
11.5
While the engine is running, and after the
air is purged from the system, loosen the
vent cap until the fuel level falls to just
above the collar, then hand-tighten the
vent cap.
11.6
Check for leaks and shut down the en-
gine.
Emergency Temporary Filter
Replacement, Fuel Pro 382
WARNING
Fluid circulated through the fuel/water separator
to heat the fuel may be diesel fuel returned from
the engine, or engine coolant. Drain the fuel/water
separator only when the engine and fluids have
05/05/2009
f470531
3
4
5
6
7
8
9
10
11
12
13
1
2
1.
Drain Valve
2.
Bottom Plate
Assembly
3.
Bottom Plate O-Ring
4.
Lower Housing
5.
Cover O-Ring
6.
Filter Element
7.
Spring
8.
Clear Cover
9.
Vent Cap O-Ring
10. Vent Cap
11. Collar
12. Inlet Port/Check Valve
13. Heat Exchanger
Fig. 4, DAVCO Fuel Pro 382
Fuel
47
47/3
cooled. Draining it when the engine is hot could
cause severe personal injury due to scalding.
If returning fuel is released into the atmosphere,
its vapors can ignite in the presence of any igni-
tion source. Do not expose the fuel to, or work
with the fuel system near, open flame or intense
heat. To do so could cause fire, possibly resulting
in serious personal injury or property damage.
1.
Shut down the engine, apply the parking brake,
and chock the tires.
2.
Put a clean receptacle under the fuel/water sepa-
rator and attach a piece of hose to the drain
valve, to direct fuel into the receptacle.
The drain valve has a 1/2-inch (12.7-mm) pipe;
use a hose with a 1/2-inch pipe thread to fit cor-
rectly.
3.
Remove the vent cap (
, Item 4) and open
the drain valve (
, Item 1) to drain the fuel
completely, then close the drain valve.
4.
Using a DAVCO Collar Wrench (
), remove
the clear cover and collar.
NOTE: Broken vent cap and collar warranty
claims will not be accepted if any tool other than
a DAVCO Collar Wrench, part number 380134,
is used for removal. During installation, the vent
cap and collar are to be hand-tightened only,
not tightened with a wrench.
5.
Remove the filter and dispose of it in an environ-
mentally acceptable manner.
6.
Clean all threads and sealing surfaces very thor-
oughly. Even a small amount of dirt will prevent
the fuel/water separator from sealing, and an air
leak may result.
7.
Ensure that the drain valve is closed.
8.
Remove the filter grommet from the filter stud, if
equipped.
9.
Fill the housing to the top with clean diesel fuel.
10. Install a standard engine spin-on filter (part num-
ber FF105 or equivalent) on the filter stud.
11. Install the cover O-ring, clear cover, and the col-
lar. Hand-tighten the collar.
12. Install and hand-tighten the vent cap O-ring and
vent cap.
05/05/2009
f470530
1
2
3
4
5
6
7
8
9
10
11
12
13
1.
Inlet Port/Check Valve
2.
Lower Housing
3.
Bypass Valve
4.
Filter Element
5.
Spring
6.
Cover O-Ring
7.
Clear Cover
8.
Vent Cap O-Ring
9.
Vent Cap
10. Collar
11. 120VAC Pre-Heater
12. 12VDC Pre-Heater
13. Drain Valve
Fig. 5, DAVCO Fuel Pro 482
Fuel
47
47/4
13. Start the engine. When the lubricating oil
reaches its normal operating pressure, increase
engine speed to high idle for one to two minutes
to purge air from the system.
14. Check for leaks and shut down the engine.
47–03 Fuel Tank Band-Nut
Tightening
Hold each fuel tank band retention nut with a wrench
while backing off its jam nut, then tighten the reten-
tion nuts 30 to 35 lbf·ft (41 to 46 N·m). After the re-
tention nuts have been tightened, hold each retention
nut with a wrench while tightening its jam nut 30 lbf·ft
(41 N·m).
IMPORTANT: Do not overtighten.
47–04 LNG Fuel System
Inspecting
WARNING
As with all pressure vessels, CNG/LNG storage
and fuel delivery systems are inherently danger-
ous and should be treated as such. Beyond the
visual inspections listed below, all maintenance
and repairs to compressed natural gas (CNG) or
liquified natural gas (LNG) systems should be per-
formed by trained personnel. Individuals who are
not trained in all aspects concerning CNG/ LNG
fuel delivery systems are not permitted to service,
maintain, test, or inspect a system in any way.
Failure to comply with safety regulations may lead
to fire or explosion, resulting in property damage,
personal injury, or death.
The following inspections must be performed by a
qualified technician, in accordance with the manufac-
turer’s established inspection criteria.
All tank components should be allowed to defrost
before conducting the following inspections.
NOTICE
Do not use a high-pressure washer or steam
cleaner on natural gas fuel system plumbing com-
ponents, as this can introduce moisture and con-
taminants into the threads of the fittings and dam-
age the sealants.
Gas detection sensors are located on the cab
overhead console and in the engine compartment
on the frontwall. The sensors are located in high
areas, where rising gas vapors will pass by or ac-
cumulate. Do not use a high-pressure washer,
steam cleaner, or silicone-based chemicals on the
gas detection sensors, as this may permanently
disable the sensors. When cleaning the vehicle,
cover the sensors with a plastic covering. Keep
the sensors covered until the area has been
cleared of any cleaning fumes. Harsh chemicals
and extremely high temperatures may damage the
sensor.
Fuel Tank and Shroud Inspecting
See
for fuel tank and shroud component
locations.
1.
Inspect the fuel tank outer shell for dents or
other signs of damage. Inspect the bottom of the
tank for deep scratches, flat spots, or gouges.
Replace a leaking fuel tank.
2.
Ensure that the fuel tank is secured to its mount-
ing brackets and that the mounting brackets are
secured to the frame. Inspect for any signs of
looseness.
3.
Ensure that all rubber isolator straps are present
and secure.
4.
Look for signs of abrasion between the fuel tank
and mounting brackets.
5.
Inspect the fuel fill fitting for signs of damage or
leaks. Ensure the fuel fill cap is present and in
good condition, and the fitting is mounted se-
curely on the tank.
6.
Inspect the fuel outlet line and fitting for signs of
leaks or damage.
7.
Inspect the primary relief vent and pipe-away line
for damage, kinks, chafing, or loose connections.
8.
Inspect the fill vent fitting for signs of damage.
9.
Inspect the shroud cover for dents or other signs
of damage. Ensure that the shroud cover latches
are in working condition and fasten the shroud
cover securely to the tank.
10. Replace leaking or damaged fuel lines. Repair or
replace leaking or damaged fittings.
Fuel
47
47/5
