- -
-
t
Pclir.1ii1
lire
~
-·
Fig.
4-51
Fig.
4-02
Flg. 4
-53
Fig. 4- 54
4
4-
H.
FU
EL
CHECK VALVE
The fuel check valve
is
fitted in the fuel return line
between the carburetor and the fuel tank.
Check
th
e fuel check valve for cracks or damages.
To replace
the
fuel check valve, proceed as follows:
l.
Disconnect the hoses from the valve and remove
the
valve.
2. Install
the
valve
by
following
the
removal proce-
dures in
the
reverse order.
Not
e:
Wh
en
installing, make sure
th
at
th
e arrow make
on
t he
v
al
ve
is
directed as shown in
Fig
. 4 - 51.
4- 1. ALTITUDE COMPENSATOR
4- 1- 1.
Checking Altitude C
om
pensa
tor
Check the
al
titude
compensator by blowing
it,
as shown
in
Fig.
4-
52.
Replace
if
necessary.
Air passes
Air does
not
passes
No
te:
more than
7
00
m
(
22
95 ft)
(High altitude)
Less than
300
m
(984
ft)
(L
ow altitude)
The operation
of
altitude compensator
will be chan
ge
d
by the
at
mospheric pressure.-
4-
1- 2.
Replacing Altitude Compensator
Remove
the
altitude compensator
in
the numerical
order.
1.
Vacuum
tubes (disconnect)
2. Altitude compensator bracket
3.
Screws
4. Altitude compensator
4- J.
IDLE
COMPEN
SATOR
I.
Check the valve
is
in closed position when bimetal
temperature is lower than operating temperature.
Opening temper
at
ure:
67
°±
4°C
To check such air into the tube.
If
excessive air
leakage is found, replace the idle compensator
as
an assembly.
2. When the bi
meta
l temperature is more than approx.
69°C (156
°F
),
check to
see
the
valve
is
in
open
pos
it ion.
If
the val
ve
is
not
open, replace the idle
compensa
tor
as an assembl
y.
4 :
16
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