142
be operating properly to adequately protect the fuel injec-
tion system. Failure to maintain fuel fillers and use clean
fuel can result in engine stoppage and expensive replace-
ment or repair
of
the injection
pump
or injectors.
Fuel Tr
ansf
er Pump
The fuel transfer pump (A, Figure 9) moves fuel from
the fuel lank to the fuel injection pump. The pump is nec-
essary when the fuel tank is lower than the fuel injection
pump.
A primer lever on the side
of
the trans fer pump per-
mits manual operation
of
the fuel pump diaphragm.
Priming or bleeding the fuel system requires operation
of
the primer lever so fuel flows to the injection system with
the engine slopped.
FUEL
I."'
JECTIOI\ S
YSTE:vJ
BLEEIlING
Air
in the fuel system can cause rough engine operation
or stoppage. Bleeding purges air from
the system. Bleed
the system anytime fuel line connections are disconnected
or fuel components are removed. To ensu re all air is re-
moved, perform the complete bleeding procedure de-
scribed in the following steps:
I. Open the bleed screw on the fuel filter (Figure 10).
Make sure the fuel valve on the fuel tank is open.
NOTE
Be preparedto contain
and
IVI/
)e
up expelled
file!.
2.
Ope
rate the priming lever
(8,
Figure 9) on the fuel
transfer
pump
while observing the fuel expelled from the
bleed screw hole. Continue to operate the priming lever
until air-free fuel is expelled,
then close the air bleed
screw.
CH A P
TE
R
SEVEN
3. Open the air bleed screw (Figure II) on the fuel injec-
tion pump.
4. Operate the priming lever (
8,
Figure 9) on the fuel
transfer pump while observing the fuel expelled from the
bleed screw hole. Continue to operate the priming lever
until air-free fuel is expelled, then close the air bleed
screw.
To Next Page
Loading...
