1.Control valve push rod
1.Control valve push rod
2.Air cleaner
2.Air cleaner
3.Big cone spring
3.Big cone spring
4. Control air valve
4. Control air valve
5.Piston of control valve
5.Piston of control valve
6.Small cone spring
6.Small cone spring
7.Control valve body
7.Control valve body
8.Rear film hull
8.Rear film hull
9.Rear film
9.Rear film
10.Feedback tray
10.Feedback tray
11.Front film hull
11.Front film hull
12.Front flim
12.Front flim
13.Cylinder push rod
13.Cylinder push rod
14.Return spring
14.Return spring
15.joint
15.joint
Fig.5.6 Vacuum booster and main brake cylinder constructure
Fig.5.6 Vacuum booster and main brake cylinder constructure
F
F
r
r
o
o
n
n
t
t
i
i
n
n
f
f
l
l
a
a
t
t
i
i
n
n
g
g
c
c
a
a
v
v
i
i
t
t
y
y
R
R
e
e
a
a
r
r
i
i
n
n
f
f
l
l
a
a
t
t
i
i
n
n
g
g
c
c
a
a
v
v
i
i
t
t
y
y
-68-
-68-
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