Air
co1
1l
rol
va
l
ve
V•oo~
dol:;
,;:;;_
:i
r=
Fig.
1A-21
Fig. 1A-
22
Fig
.1A
-23
F
ig.1A
-24
lA
vacuum reading decreases by
300
mm
-H
g ( 11.8 in-Hg)
from the vacuum at idling.
The specified time are 16
-
24 seconds.
1A- A-
8.
Vacuum Check Valve
To
check the vacuum check valve, proceed as follows.
1. Disconnect the vacuum sensing tube
@
(air
control
valve
-
vacuum check valve) from the vacuum check
valve.
2. Make sure
the
air passes through the valve when
only blowing.
If
the air passes through
the
valve when sucking,
replace the vacuum check valve.
1A-A-9.
Water Thermo Va
lve
a. Checking water thermo valve
1. Remove the water thermo valve
2. Immerse the water thermo valve
in
a container.
3.
Heat up
the
water gradually and observe the tem-
perature.
4.
Blow
the
valve and
if
air flows
out
54°C
(129°F)
or
above,
the
valve
is
satisfactory.
IA:
6
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