FUEL SYSTEM
39. CARBURETTOR
JET
NEEDLES 42.
Two jet needles are available for fitting to
the carburettors of the TR2.
(a)
FV.
For normal motoring.
(b)
GC.
For high speed motoring and
competition driving.
40. TO REMOVE
JET
NEEDLE
Remove the air-cleaner.
See page
10.
Remove the damping piston from the
top of the suction chamber.
(c)
Withdraw the three suction chamber
securing screws and move the carb-
urettor float chamber support arm to
one side.
(d)
Lift the suction chamber and remove
coil spring and washer from piston
head.
(e)
Remove the piston with jet needle
attached from the body of the carb-
burettor and empty away oil in the
reservoir.
(f)
Loosen screw in base of piston and
withdraw jet needle.
41. TO FIT NEEDLE
(Fig. 8B)
(a)
Ensure that the jet head
is
loose
in
the main body of the carburettor by
loosening clamp ring.
(b)
Ascertain that the jet needle is perfectly
straight and position it so that the
shoulder is flush with the base of the
piston, tighten screw to grip needle.
Feed the needle into its recess in the
jet head.
NOTE
:
On no account should the piston
43.
with the needle attached be laid down
so that it rests on the needle. Failure
to observe this point may cause carb-
uration defects due to a bent needle.
(c)
Position the washer and the spring on
top of the piston and the suction
chamber over the piston.
(d)
Secure with the three attachment
screws with the foremost accommodat-
ing the float chamber support arm.
(e)
Fill the piston reservoir
with
thin
oil and
fit
the damper to the suction
chamber.
(f)
Centralise the jet as described on
this page.
(g)
Tune the carburettors as described
on page
23.
CENTRALISATION OF
JET
(Fig. 8)
(a)
Disconnect the throttle linkage to
gain access to the jet head
(21)
and
remove damper
(26).
(b)
Withdraw the jet head
(21)
and remove
adjusting nut
(18)
and spring
(22).
Replace nut
(18)
and screw up to its
West extent.
(c)
Slide the jet head
(21)
into position
until its head rests against the base of
the adjusting nut.
(d)
The jet locking nut
(15)
should be
slackened to allow the jet head
(21)
and bearings
(13
and
14)
assembly to
move laterally.
(e)
The piston
(3)
should be raised, access
being gained through the
air
intake
and allowing it to fall under its own
weight. This should be repeated once
or twice and the jet locking nut
(15)
tightened.
(f)
Check the piston by lifting to ascertain
that there is complete freedom of
movement. If
"
sticking
"
is detected
operation
(d)
and
(e)
will
have to be
repeated.
(g)
withdraw jet head
(21)
and adjusting
nut
(18).
(h)
Replace nut
(18)
with
spring
(22)
and
insert the jet head
(21).
(i)
Check oil reservior and replace damper
(26).
(j)
Tune the carburettors as described on
page
23.
TO ASSEMBLE
THE
CARBURElTOR(S)
Havine ensured the cleanliness and the
servi&bility of
all
component
arts, it is
suggested that the carburettor
P
S) are as-
sembled in the following sequence.
The front carburettor differs from that of
the rear insomuch that there are ce&
additions. As and when the additions occur
they
will
be specifically mentioned.
(a)
Fit the ignition union to the front
carburettor, this utilises the tapped
bore which breaks through into the
mixture passage.
(b)
Position the throttle spindle in the
body in such a manner that the
S
indle
protrudes
less
on the left-han8 side
looking at the
air
cleaner ends.
To Next Page
Loading...
