CLUTCH
Service Adjustment Procedures
Distance between the clutch pedal
and the
when the clutch
is disengaged
Good
When engine is
stopped
No good
When engine is
started
4. Measure pedal play. In the case of AWD vehicles, depress
the pedal 2 or 3 times to eliminate booster negative
pressure with the engine stopped and then push the pedal
with a finger to measure the play.
Clutch pedal play (including play of
pin)
Standard value: 6 13 mm
in.)
CHECK VALVE OPERATION CHECK
When checking the check valve, keep the check valve fit in the
vacuum hose.
1. Remove the vacuum hose.
Caution
The check valve is press-fit inside the vacuum hose and
do not remove the check valve from the vacuum hose.
5.
Measure the clearance to the toe board (or pedal stopper)
when the clutch disengages. In the case of AWD vehicles,
measure with the engine running.
Clearance to toe board when clutch disengages:
Standard value: 55 mm (2.2 in.) or more
6.
If the play and/or clearance is out of specification, bleed the
hydraulic system or check the master cylinder, release
cylinder or clutch proper.
CLUTCH BOOSTER OPERATING INSPECTION
For simple checking of clutch booster operation, carry out the
following tests.
Run the engine for one or two minutes, and then stop it.
(2) Step on the clutch pedal several times. with normal
pressure.
If the pedal depressed fully the first time but gradually
becomes higher when depressed succeeding times the
booster is operating properly.
If the pedal height remains unchanged, the booster is
faulty.
With the engine stopped, step on the clutch pedal several
times with the same foot pressure to make sure that the
pedal height will not change.
Then step on the clutch pedal and start the engine.
If the pedal moves downward slightly, the booster is in
good condition. If there is no change, the booster is faulty.
(4) With the engine running, step on the clutch pedal and then
stop the engine.
Hold the pedal depressed for 30 seconds. If the pedal
height does not change, the booster is in good condition.
If the pedal rises, the booster is faulty.
If the above three tests are okay, the booster performance can
be determined as good.
If one of the above three tests is not okay at last, the check
valve, vacuum hose, or booster will be faulty.
TSB
Revision
Содержание 3000GT 1991
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