Lotus TURBO ESPRIT Service Manual page 324

Page
8
d)
With the tool holding the wings of the carrier apart, slide the new
cylinder into the carrier bracket whilst depressing the locking pawl
Note
Check that the cylinder i s fitted the correct way up.
e)
Ensure that the pawl locks into the carrier bracket locating hole
and remove the spreader tool.
JC.
6
-
BRAKE DISCS
Check the braking surface on both sides of the brake discs for scoring or corrosion.
Replace i f i n doubt.
Measure the disc thickness and run-out:
Front
Rea r
Thickness, nominal 20.0 m m (0.79 i n
.)
12.0 m m (0.47 in.)
Thickness, minimum 19.0 m m (0.75 in.)
1 1 .O
m m (0.43 in.)
Run-out, maximum 0.15 m m (0.006 in.) 0.20 m m (0 .008 i n
.)
I f the run-out
i s excessive, replace the disc.
NOTE
Ensure the front wheel bearings are correctly adjusted before measuring
front disc run-out
.
JC.
7
-
BRAKE SERV.0 UNIT
The 'Master-Vac' brake servo i s
,
with the exception of the air filter and non return
valve, a non- serviceable sealed unit which must be replaced i f found to be faulty.
The air filter (surrounds input push rod) should be replaced whenever the brake
system i s overhauled, and cleaned or replaced more frequently
i f
the vehicle
i s
operated i n dusty conditions
.
The
vacuum non-return valve
i s
incorporated into the vacuum hase elbow connector
tn the front case of the servo unit. The valve i s a push f i t into a grommet, and i s
supplied complete with new grommet.
A s
a quick check of servo operation proceed a s follows:
With
engine stopped, press the brake pedal several times to exhaust the servo unit
of vacuum. Keeping the pedal pressed (which should be 'hard
'
and 'high') start
the engine; the pedal should drop slightly as the servo vacuum builds
up.
When replacing a servo unit, ensure that the input pushrod i s located
i n
the
brake pedal lower hole marked
'B'
(Brake) and not i n the upper hole 'C' (Clutch)