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OP
ERATION
N
MA.
64OO
(heck/n and ad/as
tint /1
i/
-
. .s R
Op. MA.
640-0
1.
CHECKING
AND ADJUSTING:
1.
Checking the operation of the air-conditioning
Faulty
operation
may be due to
the
following
Insufficient
quantity
of F.12
fluid, caused
by improper
filling or
ci
leak.
-
Water
in
the system.
Insufficient
guantity of
fluid may be detected
by
examirling the transparent
index
mark
of
the de-watering tank.
This lock of fluid would be shown up by the
appearance
of
air-bubbles during
operation.
The presence of water
is
shown up
by
the
forraation of
ci small guantity
of ice
near
the
pressure
release
valve
whlch
causes
irregular
functioning of the system.
In both
cuses, the system must be
drained.
the
circuits
must be put under vacuum (to eliminote any trace
of
water
),
and refilled
with 1R.12
fluid.
2. Corburotion
Adjusting the idling speeds
(as
soon
as electric
coaling fans cut out
ci
)
LJic/c s
ni/bon
/ tu
rqlI on
i r/c r
-
Engine
idling
speed 850 to 900 rpm
(
compressor switched off
Fast
idling
speed
1000
to 1050 rpm
(
compressor in operation
b
)
Vb ,cl(.s nith lo rqn c con i rlcr
Engine
idling speed
700
to 750 rpm
(
compressor switched off
Fast
idling speed 725 to 775
rpm
(
handbrake on
vehicie immobilised
one
gear engaged, and
compressor
switched off
The fast idling speed is adjustable by
rneans
of
adjusting screw
located on top of
the vacuurn capsule
on
the
car
burettor
-
NOTE
:
In
case the fast
idle is impossible
to obtain, the vacuurn
capsule
may
be
moved
slacken
both
fixinq
screws
on carburettor
).
in order to
reduce the clearance
at
the fixinq point of
the
rod controuling
the
first
choke butterfly opening.
3. Adusting the
pulleys
Camshaft pulley-water ump pulley no auiqning to
be carried
out
Toothed
helt
tensioner-water
pump pulley
: L
2T
_.05
mm.
this
value to be obtained
by
placinq shims
between the tensioner and
its
mountirig plate.
Water pump
/JJiLILLJI
Alternator
drive
Tensioner
Compressor-water pump aliqnment to within 0.5
mm
by
placing
shims
(
1)
between the
cornpressor rnountinq
plate and the clutch housing.
Tensioner
-
compressor
alignment to within 0.5
mm
by
movement of the tensioner mountiriq plate
in
its siots
4. Tensioning the beits
Trapezoidal beits for compressor
-
Fitting
tension 40
to
50 daN 40
to
45
kg
)
(
88 to 99 lb
-
Operating
tension
:
25 daN (25
kg
) (
55
ib
-
Toothed
belt
driving
water-pump
15 to 18 daN (15
to
18 kg
)
(
33 to 40
Ib
NOTE :
Insufficient
tension will considerably
reduce
the reliability
of
the
toothed helt.
A
tension
stronger
than 18 daN
(
18
kg) (
40
Ib
)
will cause
the helt
to whistle.
Consequently, adlust the
belt at the
limit
of the noise ; tension it until tt whistles while running.. then reduce
tension
until
the
noise disappears.
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