MG Magnette KA Instruction Manual page 102

SHOWING DIAGRAMMATICALLY THE CAMSHAFT A N D BUSBAR ACTION
A D J U S T E R SET S C R E W
, S
LOCK NUT
I
A. Busbar in neutral position, first speed selected. B.
Pedal depressed, busbar down, the strut engaging
with the busbar.
C a m s h a f t a n d B u s b a r Action.-Now refer t o a series of
illustrations A t o E which show what actually takes place i n the
various phases o f gear selection engagement, starting w i t h neutral,
followed by selection o f first gear, first gear i n operation, and
then second gear selected, whilst first gear is operating and
finishing in t h e intermediate position when the pedal is pushed
d o w n preparatory t o engaging second gear.
These series of illustrations clearly show the action of the
busbar during t h e gear-changing operations, the same lettering
has been followed throughout and the parts lettered are as
follows :-
A. Selector spring.
B. Busbar.
C. Camshaft.
S. Operating strut.
The action of the selector spring A forces operating s t r u t S
towards t h e busbar and the operating s t r u t carries a t h r o w o u t
spring t o disengage the strut, when i t is n o t selected. I t w i l l
be noted that when the busbar rises, the pull r o d and table take
u p a new position.
D. First speed in operation, second speed selected.
C.
Pedal raised, first speed engaged, busbar up.
E. Pedal depressed for change of gear, busbar down, struts
changing position.