Mitsubishi Eclipse Workshop Manual page 447

SERVICE BRAKES
-
Service
Adjustment
Procedures
35-45
lntake
manifold side
Brake
booster
side
o
Wu^t""
r4Aoal7
I
o
Proportioningvalve r4lorsr
Output
pressure
lnput
pressure
14u0055
2.
Check
the operation of the check valve by using a vacuum
pump.
Gaution
lf the
check valve is defestive, replace
it
as an asscmbly
unit together
with the
vacuum
hose.
PROPORTIONING VALVE FUNCilON TEST
t.'rxcr
1.
Connect
two pressure gauges, one each to the input side
and output side of the proportioning valve. as shown.
2.
Air
bleed
the
brake line and the pressure gauge.
3.
While gradually depressing
the brake pedal, make
the
following
measurements and check
to
be
sure that the
measured values are within the allowable
range.
(1) Output
pressure bögins
to
drop
relative
to
input
pres-
sure (split point).
Standard value:
<zWD>
2.45-2.95
MPa
124.5
- 29.5 kg/
cm2,
348 - 42O
p.il
<4WD>
3.45-3.95
MPa
(34.5-39.5
kg,/cmz,
491-561 plil
(2)
Output
fluid
pressure when input fluid pressure are
as
follows.
Standard value:
<2WD> 3.65-4.15
MPa
(30.5-41 .5 kg/wrf,
519-59O
psil
'
[at
6.7 MPa (67
kg/crf,g53
paill
<4WD> 4.65-5.15
MPa {46.5-51 .5
kg/crf,
661-732
psil
lat7.7
MPa
177
kg/clrn2, l,OgS pCll
(3)
Output pressure difference between left and right
brake
lines
Limit:
O.4 MPa
14
kg/cmz, 57 psil
4.
lf the
measured pressures arb not
within the permissiblq
ranges,
replace.
the
proportioning
valvq.
t"
BLEEDING
üv,.r
When
the
master-
cylinder is empty of
brake fluid, bleed air
from the master
cylinder
by
proceeding with procedures
(11
thru
(6). {Because-this master cylinder is not equipped with
a
check valve.)
'
.
When.brakefluid remains
in
the
master cylinder, proceed
with
step (6).
(1) Disconnect the
brake
tube from the master
cylinder.
' (2).Two
persons should conduct the air bleeding, one penion
'-:
slowly depressing
the brake pedal and holding the pedal,
'depressed.
PWUE9o|0
I
o
I
o
t
,l
Vacuum pump connection
AccepVreject criteria
Connection
at
the
brake
booster side O
A
negative pressure (vacuum)
is
created and
held.
connection
at the
intake
manifold side
@
A
negative
pressure (vacuum) is not
created.