
Page 22
little jointing compound should be used
between Insulator faces and body faces.
(f) Remove the slow running volume control
screw and see that Its tapered end is In good
condition. If worn, it should be changed.
The spring under the screw head must be long
enough to prevent the screw from vibrating
from its set position.
(g) Check that the throttle spindle is not badly
worn. Wear at this point allows an excessive
amount of air to enter the carbur:ettor under
slow running conditions.
Poor performance at small throttle opening
(a) Adjust the idling speed to give smooth running,
just off rich or "hunting" condition at 600
r.p.m. With twin carburetto_rs a flat spot or
deadness at low speeds is generally caused by
the carburettors not being properly synchro
nised.
(b)
If the flat spot is stlll evident, check that the
Idle and progression holes are clear.
(c) Check that the idle jet Is clear.
(d) Check float chamber fuel levels.
Poor acceleration
(a) Make certain the calibrated orifice In the pump
discharge nozzle and the drllllngs In the screw
securing the nozzle through which the petrol
must pass on Its way to the pump nozzle are
clear. See inset Fig. 13.
(b) Check that the pump piston works freely and
is not stuck down. Provided the pump cylinder
Is clean, the spring beneath the piston will
ensure the return of the piston.
(c) See that the non-return (suction) valve to the
WMS.124
Section C (Fuel System)
pump cylinder is clean and will close effectively,
and that the assembly is screwed tightly Into
the base of the float chamber.
(d) Two settings are available for the pump stroke
by using one of the two holes in the pump out
side operating lever. The lever is normally set
in the hole which gives a short pump stroke.
The hole 'L' Is used to give a long pump stroke,
See Fig. 14. This hole provides the means re
quired to vary the quantity of fuel delivered by
the accelerator pump. If the pump link is in
the short position, try the linkage in the hole
giving maximum length of piston travel.
(e)
WIA Carburettors only
Remove the by-pass diaphragm cover and
check that the stem on the insert fitted in the
centre of the diaphragm will move freely. On
snap opening of the throttle, the lower de
pression in the manifold will permit the spring
above the diaphragm to force this stem down
and open the by-pass valve to provide addi
tional fuel apart from that coming from the
metering jet and from the pump nozzle. There
fore, any obstruction In the by-pass Jet or
incorrect operation of the by-pass valve will
affect acceleration.
(f) Flat spots or hesitation on slow progressive
throttle opening can be caused by Incorrect
adjustment of the slow-running mixture or by
the progression hole or holes in the throttle
barrel being partially obstructed.
Difficult starting from cold
Ensure there is petrol in the float chamber, and
that It is replenished by fresh petrol from the fuel
pump within a few seconds of rotating the engine
by the starter. A clip fixing the needle to the float
arm ensures that the needle Is lifted from the
seating, eliminating any question of the needle
·.J
Содержание ALPINE I SERIES: APLINE II SERIES
Страница 1: ......
Страница 42: ...1st issue Page4 0 WSM 114 Section B Engine Fig I En1lne lon11tudinal section l494c c enrlne shown J...
Страница 44: ...3rd re Issue Page 6 Fl1 3 Cylinder block and associated parts 494 c c enrine shown WSM 124 Section B Engine...
Страница 45: ...WSM 124 Section B Engine view o working parts 494 Fis 4 Exploded f 7397 c c engine shown 6th re Issue Page7...
Страница 189: ...Fis 21 Ball pin heirht checkinr fixture in position Details of items 1 to 4 In Fig 22...
Страница 208: ...Fla 3 Exploded view of rear axle Hypoid Bevel Drive...
Страница 220: ...Page 16 WSM 12 f Section G Rear Axle 0 QQ I I I I I t 0 ii 8 ts t 0 Cl 2 i J...
Страница 247: ...Page6 WSM 124 Section J Steering N Iii it...
Страница 299: ...Page 40 3 6 7 8 Fis 22 Se rvo unit exploded view Sect WSM 124 ion K Brakes 18 419 GZo 21...
Страница 413: ..._ PRINTED IN ENGLAND 9Y WREN PRINTING CQ LTD LONDON...