Hyundai: Engine D4FA. Manual - part 169
FUEL DELIVERY SYSTEM-DIESEL
FLA -547
HIGH PRESSURE FUEL PUMP
DESCRIPTION
EDBA1EB7
The high-pressure pump is the interface between the low-
pressure and the high-pressure stages. Under all oper-
ating conditions, it is responsible for providing adequate
high-pressure fuel through out the vehicle’s complete ser-
vice life. This also includes the provision of extra fuel as
needed for rapid starting and for rapid build-up of pressure
in the rail. The high pressure pump continually generates
the system pressure as needed in the high-pressure accu-
mulator (common rail). This means therefore, that in con-
trast to conventional systems, the fuel does not have to be
specially compressed for each individual injection process.
REMOVAL
EC6BC786
CAUTION
• Common
Rail Fuel Injection
System
is
subject to extremely high pressure(Approxi-
mately 1,600 bar)
• Never perform any work on injection system
with engine running or within 30 seconds af-
ter the engine stops.
• Always pay attention to safety precaution.
• Ensure the absolute cleanliness
• It is not recommended to remove the injec-
tiors without any notice.
1.
Turn ignition switch OFF position.
2.
Disconnect the negative battery(-) terminal and wait
for about 30 seconds.
3.
Disconnect the wiring connector of fuel pressure reg-
ulator.
4.
Remove the high pressure pipe (A) connecting high
pressure pump and common rail.
A
C
B
D
LGJF503E
5.
Disconnect the return hose(B) and the hose(C) con-
necting to the fuel filter.
6.
Unscrew the three high pressure mounting bolts(D).
7.
Remove the drive belt.(Refer to "EM" group.)
8.
Turn the crankshaft pulley and align its groove with
timing mark "T" of the timing chain cover.
(NO.1 cylinder compression TDC position.)
Mark
LCGF089A
9.
Remove the high pressure pump sprocket nut(G) after
removing the timing chain cover plug(F).
F
G
LGJF502W