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Test
I
opera-
tion
7
8
Fault
The
pressure drops more than
5
kg/cm
2
(71
Ib/sq.
in .)
The parking brake warning
lamp
does not
light
Footbrake warning lam p does
not
light
I
Cause
Leaking
check
valve
Leaking
seal
for front
pressure
plunger in servo
cyl
ind
er
Internai fault in
servo cylinder
Wrongly adjusted
switch
Fa
ulty
e
le
ctrical
parts
Fau
lty
switch
Warning lamp
does
not go out
Pistons
se ize
when pistons have
returned to
normal
position
Warning when pressure
d iffer-
Fau
lty
warning valve
ence is other than
5-
15
kg/cm
2
(71
-
213
Ib/sq.in.)
9-
10
Leaking valve
11
A
circuit
fades
The rear wheel brakes fade
A wheel brake
fades
Faultily set
val,ve
Blocked
equa
li
zing
hole in
master
cylinder
HancJbrake cable
chafes
Faultily adjusted
handbrake
Faulty
brake valve
Darnaged
brake
line
Blocked
hose
Worn
sealing
ring
Remedy
Remove and blow dean
the
valve
and replace the seal ring.
If
insufficient,
rep lace
check
valv
e
Remove
master
cylinder and re
-
place
seal
Replace
servo cylinder comple
-
tely
Adjust the
switch
Repla
ce
faulty parts
Rep
la
ce switch
Replace
warning valve
Replace
valve
Recondition or replace brake
valve
Adjust if reconditioned
valve
tested,
see
page
5 :
19
Recondition
the master
cylinder
Replace the cable
Adjust the
handbrake
Recondition or replace brake
valve
Replace
line
Replace
hose
Recondition wheel brake
unit
5:5
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