Chapter 3 Fuel Injection Equipment
_.5._F_ue_l_Fi_e_e_d_P_u_m,;.:P;;,_
________________________
3,4JH3(B)(C)E
5-3
Disassembly
and
reassembly
of
fuel
feed
pump
5-3.1
Disassembly
(1) Remove the fuel feed pump mounting nut, and take the
fuel feed
pump
off the fuel injection pump.
{2) Clean
the
fuel feed
pump
assembly with fuel oil.
(3) After checking the orientation of the arrow on the cover,
make
match
marks
on
the
upper
body
and
cover,
remove the small screw, and disassemble the cover,
upper body and lower body.
5-3.2
Reassembly
(1) Clean all parts with fuel oil, inspect, and replace any
defective parts.
{2) Replace any packings on parts
that
have been dis-
assembled.
(3) Make sure that the intake valve and discharge valve on
upper body are mounted
in
the proper direcHon, and
that you don't forget the valve packing.
(4) Assemble the diaphragm into the body, making sure
the
diaphragm
mounting
holes
are
fined
up
{do
not
force).
{5} Align the match marks
on
the upper body
of
the
pump
and
cover, and tighten the small screws evenly.
kg•cm
Tightening torque
15~25
5-4 Fuel feed pump inspection
(1) Place the fuel feed
pump
in kerosene, cover the dis-
charge port with your finger, move the priming lever
and
check for air bubbles (Repair
or
replace
any
part
which emits air bubbles).
Measuring
cylinder
-
Air
pressure
kg/cm
3
Tappet
Container
filled
wiih
!igh1
oil
Blocked
(2) Attach a vinyl hose to the fuel feed pump intake, keep
the
pump
at the specified depth from the fuel oil sur•
face, move
the
priming
lever
by hand and check for
sudden spurts of fuel oil from the discharge port. If oil
is
not
spurted
out,
inspect
the
diaphragm
and
diaphragm spring and repair/replace
as
necessary.
(3) Diaphragm inspection
Parts
of
the diaphragm that are repeatedly burned will
become thinner
or
deteriorate over a long period of time.
Check the diaphragm and replace
if
necessary.
Printed in
]a.pan
HINSHI-H8009
3-31
(4) Valve contact/mounting
Clean the valve seat and valve with air to remove
any
foreign matter.
(5) Inspect the diaphragm spring and piston spring for
se1tl·
ing and the piston
for
wear, and replace as necessary.
NOTE : Replace parts
as
an assembly.
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