PREVOST X3-45 COMMUTER User Manual

SECTION 03 : FUEL SYSTEM
6
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
15 Secondary filter
16 Fuel filter housing
17 Fuel pressure sensor (low pressure
system)
18 Aftertreatment hydrocarbon injector
module
19 Hand pump (fuel primer pump)
2.1 FUEL VALVE
The manual shut-off valve is located on the inlet
side of Davco Fuel Pro 382 primary fuel filter.
FIGURE 4: MANUAL SHUT-OFF VALVE LOCATION -
DAVCO FUEL PRO 382
FIGURE 5: FUEL LINE COMPRESSION FITTING
CAUTION
ALWAYS replace the fuel line compression
sealing washers when troubleshooting for fuel
aeration or performing any service procedure
that requires the removal of engine fuel lines.
2.2 DAVCO FUEL PRO 382 PRIMARY FUEL
FILTER
The Fuel Pro 382 fuel processor (Figure 6) is
installed between the fuel tank and the
secondary fuel filter and is used as the primary
fuel filter. This system also serves as a water
separator and is equipped with a heating
element for winter conditions.
The filter fibers used in the Davco Fuel Pro 382
element may cause the fuel level to read
artificially high when the filter is first installed.
Over the first few days, the filter fibers eventually
become fully saturated and the fuel level will
drop to normal levels. Do not be concerned
about an abnormally high fuel level when a new
Davco element is installed.
Fuel level rises as dirt collects on the filter from
the bottom up. Restriction remains consistently
low because fuel always flows through clean,
new media.
MAINTENANCE
Replace Fuel Pro 382 filter element when the
fuel level in the see-thru filter cover reaches the
“CHANGE FILTER” lettering on the clear cover.
FIGURE 6: DAVCO FUEL PRO 382 INSTALLATION
2.2.1 Priming fuel system
To prime the fuel system, turn the engine off and
then proceed as follows:
Close the shut-off valve on the “fuel in” side of
the Fuel Pro unit and then pump fuel into the
engine through the quick coupling. When

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in