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4-4 [M4B1]
BRAKES
2) As master cylinder fluid pressure increases, it over-
3) As master cylinder fluid pressure increases further,
comes spring tension so that the valve piston moves to
the valve piston moves further outward . The valve then
the center of the master cylinder . This closes the valve
comes in contact with the cylinder body so that the
to control the fluid pressure applied to the rear wheel
valve is opened .
cylinder. This is the split-point fluid pressure .
As the valve opens, the rear wheel cylinder fluid pres-
Th'
th
I
' t
h
r Valve
Cylinder body
!
+ Rear wheel
cylinder
Master
0
cylinder
(Secondary)
Valve piston
0rr-'1
-Z
O
Spring
O .
{
O
I
O
I
\=_il
Master
cylinder
(Primary)
t--
'
,~ Rear wheel
7 cylinder
C4-510
Fig . 16
sure Increases .
Is moves
e VG VU pls onto t e
center of the master cylinder, closing the valve again .
Valve
Cylinder body
`
t
Rear wheel
cylinder
Master
0
>
cylinder
(Secondary)
Valve piston
``t
U
-~
Z
-
f
°`.O
I
Spring
U
{I
O
O
- -
- { -
T
Master
-
cylinder
(Primary)
Rear wheel
cylinder
C4-511
Fig. 17
10
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Troubleshooting
