Table of Contents
Advertisement
Disassembling
Inspection
Checkmg
wIth fuel pump Installed
on
engme
SWItch off and stop
the
engIne
DIsconnect the fuel pIpe
at
the mlet
unIOn
of
the carburetor
and then
turn
the engIne wIth the crank handle
Now
the
gasolIne
should be
ejected vlgorounsly
from
the
tIp of the pIpe
once
every
two
rotatIOns
of the crankshaft
To
test
the functIon of the pump alone
operatIon of the hand prImer and
checkmg
the
fuel eleCtIon
IS
enough
Removal from engIne
Fuel pump
can
be
easIly
removed
by dIsconnectIng
the mlet and outlet
UnIons
and
loosenIng
the 2 attachment
nuts
InspectIOn
prIor
to
dIsassemblIng
Pnor
to
dIsassemblIng
of
the
removed pump
measure
the dIstance
between
the rocker
arm
and
flange
of
the lower
body by
means
of
a
scale and
see
If
the
rocker
arm
rocker
lInk
and pms
are worn
1
1
Method of
dIsassemblIng
FIrst WIpe dIrt off the
outer
surface of the pump
and
put marks
on
both the
upper and lower bodIes
to
make theIr
reassembling
easy
It
IS
easIly separated
Into two
when the fIVe
screws
around
the
upper
body
are
loosened
Take
great
care not
to
damage
the
dIaphragm dUrIng
thIS
dIsassembly
Checking
Repaues
of Parts
Wash
the dIsassembled
parts
well
In
gasolIne
then Inspect them
Replace
the
dIaphragm
If any
damage
ImpregnatIon
by gasolIne
Replace
a
valve
assembly
If any
wear or
faulty
operatIOn
IS
detected
Even If repaIrs
are
unavOIdably reqUIred
the
lImIt
for repaIrs of warp
or
wear
of the valve
IS
0 001
In
When the surface of the valve
seat
or
valve
IS
found
Irregular
remove the
valve
seat
of the outlet and dress the surface WIth
a
fIne OIlstone
In
case
of
Irregulanty
of the
seat
surface of the Inlet valve
whIch
cannot
be taken off from the
body
recondItIon
It
wIth
a
cutter
and
grIndIng
tool
When the surface
of
the valve
IS
faulty
place
some
very fIne
gnndIng
com
pound
on
the surface
of
a
flat pIece of
glass plate
and
gnnd
It
lIghtly
wIth the tIp
of
a
fInger
The standard thIckness
of
the valve
IS
1 6
mm
The hole of the JOInt parts of
dIaphragm
shaft and lInk may
be
worn to some
extent
ThIS
IS not serIous
but when
serIOUS
eccentrIC
wear
crack
or
break
age
IS
found
the part
must be
replaced
As
a
remedIal
measure
such
wear can
be
compensated
for
at
the
tIme of
dIsmantlIng
and
reassemblIng
of the
body
by
InsertIng
a
packIng
made of thIck
paper between the lower
body
and
dIaphragm
to raIse
the
relatIve
posItIon
of
dIaphragm
shaft wIth
respect
to
the lower
body
The rocker
arm
should
be
replace
when
ItS
contact face
wIth the
cam
and
that WIth
the
lInk and
Its
pIn hole
are
senously
worn
62
Hide quick links:
Advertisement
Table of Contents
