Fuel Filters - PREVOST H3-41 Maintenance Manual

SECTION 03 : FUEL SYSTEM
FIGURE 2: MANUAL SHUT-OFF VALVE (VOLVO D13
ENGINE)
Shut-off valve is designed to prevent loss of fuel
prime. No manual valve is required on preheater
fuel-supply line, since the positive-displacement
fuel pump (located close to the fuel tank) prevents
fuel flow when not activated.
FIGURE 3: MANUAL SHUT-OFF VALVE LOCATION WITH
DAVCO FUEL PRO 382 (VOLVO D13 ENGINE)
6
PA1615 Maintenance Manual All Series
FIGURE 4: FUEL LINE COMPRESSION FITTING
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 FUEL FILTERS

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The primary and secondary (aka pre-filter and
main filter) fuel filters are of a spin-on type and
must be replaced at the intervals specified by
the Lubrication And Servicing Schedule in
Section 24: LUBRICATION & SERVICING.
The primary fuel filter should be drained
periodically or when the telltale light on the
dashboard illuminates if equipped with this
system. To drain water, loosen the drain valve
below the separator. Place an appropriate
container under the filter. Close the drain valve
when finished.
A primary fuel filter is installed on the engine.
This filter consists of a filter cartridge, a water
separation bowl with a drain valve. It is used to
prevent water from entering the fuel system.
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Section 03 revised September 2016
CAUTION
MAINTENANCE