Section 03: FUEL SYSTEM
PA1562
8
removed. It is not necessary to bleed the fuel
system after replacing the filter, since this is
performed automatically when the engine is
started and runs for more than 2 minutes.
The plugged outlet (18) is fitted on the fuel filter
housing. This outlet is used when measuring
supply pressure after the fuel filter with an
external pressure gauge. The pressure sensor
(19) on the fuel filter housing monitors the
supply pressure after the fuel filter. A fault code
is displayed on the instrument cluster if the fuel
supply pressure is less than the specified value.
Hand Priming Pump
The hand priming pump (13) is located on the
fuel filter housing and is used to pump fuel
(when engine is not running) after the fuel
system has been drained for repair, etc. The
non-return valve (22) for the hand priming pump
is also located in the fuel filter housing.
2.2 FUEL VALVES
The manual shut-off valve on engine fuel-supply
line is located on the R.H. side of engine
compartment. A manual shut-off valve is
located at the inlet side of the primary fuel filter
or at the inlet side of Davco Fuel Pro 382 fuel
filter. 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 8: MANUAL SHUT-OFF VALVE (VOLVO D13
ENGINE)
03088
FUEL LINE FITTINGS – VOLVO D13 ENGINE
A 13 ± 2 ft-lb (18 ± 3 Nm)
B 20.5 ± 3 ft-lb (28 ± 4 Nm)
C 22 ± 3 ft-lb (30 ± 4 Nm)
D 26 ± 4 ft-lb (35 ± 5 Nm)
E 29.5 ± 4 ft-lb (40 ± 5 Nm)
F 35 ± 4 ft-lb (48 ± 5 Nm)
FIGURE 9: MANUAL SHUT-OFF VALVE LOCATION WITH
DAVCO FUEL PRO 382 (VOLVO D13 ENGINE)
03087
FIGURE 10: 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.
2.3 FUEL FILTERS
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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