Rolls-Royce Silver Shadow
6
Bentley
T
Series
Workshop
Manual
Chapter
K
21. Ensure that the engine has
run
a minimum
On cars from Car Serial Number
SRH
8742 and
period of 25 minutes since
tke thermostat has opened
onwards the 'fast-idle' speed should be set to 2
000
(see Operation
8)
then fit the probe of a C.O. meter
r.p.m.
into the exhaust system. The C.O. meter should be set
6.
Where the engine is required to start below
in accordance with the manufacturer's instructions.
-12°C. (10°F.) the 'fast-idle' speed should be set to
Note
Suitable C.O. meters are:
2
000
r.p.m.
1.
Horiba Mexa 200.
2. Borsh Model Efaw 109.
22.
Idle the engine until a steady C.O. reading is
obtained (minimum time
4
minute) then check the
exhaust emission on the C.O. meter; the correct read-
ing should
be
between
4%
and
4)
%.
If the C.O. meter reading is not within this limit it is
permissible to unlock the jet adjusting screws and turn
them a maximum of
4
of a turn, either clockwise or
anti-clockwise, whichever is necessary to give the
correct reading on the meter.
Do not
tano
them
in
opposite directions
(i.e. richen one and weaken the
other). Lock the jet adjusting screws.
If the correct C.O. meter reading is unobtainable at
this setting,
and the
settings
have been
wried
out
to
the btmctions given,
the carburetters should be
removed from the engine and overhauled as described
previously.
23. Remove the C.O. meter.
24.
Check and if necessary set the engine idle speed
(see Operation
13) using the fixed throttle stop screw.
25.
Re-conneet the hose to the hot idle compensator
valve.
Cold start 'fast-idle' speed-To set
(see Figs.
K11
and
K21)
The cold start engine speed should be set with the
engine at normal running temperature.
1. With the engine stopped depress the accelerator
from beneath the bonnet
(see Section K5-Throttle
Throttle damper plunger-To set
(sea Figs.
K20
or
K21)
1.
Move the cold start 'fast-idle' to its off position.
2.
Move the
'A'
bank throttle lever to its clcsed
throttle position.
3.
Slacken both nuts securing the throttle damper
to its bracket then back them off until they are well
clear of the bracket.
4.
Set the damper with the throttle spindle com-
pressed to 0.187 in.
(4,75
mm.)
and tighten the lock-
nuts.
5.
Ensure that the centre of the damper spindle is
resting on the centre of the throttle lever pad.
Stator micro-switches-To set (if fitted)
(see Fig.
K20)
The stator micro-switch
(see Fig.
K20
item
11) which
signals the initial stator angle change is non-adjustable
and it is only necessary to check that the switch is
functioning correctly.
The stator micro-switch
(see Fig.
K20
item
I) which
signals stator angle change at approximately
45
degrees
of throttle opening should be adjusted
as
follows.
1. Move the throttle linkage to the full throttle
position, then check that the gap between the heel of
the cam lever and the inner face of the micro-switch
bracket is set to dimension
V.
2.
If the gap is less than the dimension quoted, the
full throttle stop
(item
6)
should be turned clockwise
until the correct gap is attained.
$
Control
Linkage Settings);
at the same time close the
choke butterfly by hand. Release the accelerator, so
Kick-down micro-switch-To set
allowing the 'fast-idle' cam to turn.
1.
Using a 0.015 in. to 0.030 in. (0,381 mm. to
2. Release the choke butterfly, so
allowing the 'fast-
0,762
mm.)
feeler gauge fitted between the full throttle
idle' adjusting screw to
rest on the high step of the
Stop screw and its stop, adjust the kick-down micro-
cam.
n hi^
will leave &e throttles in the cold
switch adjusting screw so that it just operates the
position.
switch; a
cIicking noise will
be
heard as the switch is
3.
Ensure that the gearchange selector is in Neutral
operated
(see appropriate illustration ~i~s.
K20
and
~21
position and that the handbrake is applied.
diagram
B).
-
4.
Start the engine.
5.
Check to ensure that the 'fast-idle' adjusting
screw is resting on the high step of the cam, then using
Refrigeration 'fast-idle'-To set
(see Figs.
K21
diagram
C)
the 'fast-idle' adjusting screw adjust the engine speed to
The following procedure applies to cars prior to Car
r~
1 850 r.p.m.; lock the adjusting screw by means of the
Serial Numbers SRH 7834,
SRX 7826,
CRH
7886
%
lock-nut and check to ensure that the engine speed is
and DBH 7883.
6
still 1 850 r.p.m. By slightly opening the throttles the
The engine should be thoroughly warm when
carry-
m
C
cam will fall away; on releasing the throttles the engine
ing out this check. If the refrigeration 'fast-idle' is not
will assume normal idling speed.
checked at the same time as the normal idle speed
To Next Page
Loading...
