MG Magnette KA Instruction Manual page 120

T h e E l e c t r i c P e t r o l Pump.-The pump is fitted on the off-side o f the dash
wall and consists o f three main assemblies, the body, the magnet assembly and the
contact breaker. The body is composed of a hollow brass stamping " A " i n t o the
bottom of which the filter
"
B " is screwed. The inlet union
"
C
"
i s
screwed
in at an angle on one side. The outlet union
"
D,''
which
i s
screwed i n t o the top.
tightens down on t o the delivery valve cage
"
E,"
which is clamped between t w o
fibre washers
"
F " and
"
G." In the t o p of the cage is t h e delivery valve, a t h i n
brass disc
"
H " held in position by a spring clip
"
I." Inserted in the bottom o f
t h e cage
i s
a light spring "
J," which rests on the suction valve
"
K," the latter being
a similar disc resting on a seating machined in the body. Holes connect the space
between t h e valves t o t h e pumping chamber, which is a shallow depression o n t h e
forward face o f the body; This space
i s
closed by a diaphragm assembly
"
L," which
is clamped at the outside between the magnet housing
"
M
"
and the body, and in
the centre between a brass plate
"
K I " and the steel armature " 0 . " A bronze
rod
"
P
"
is screwed through the centre of this and passes through t h e magnet core
t o the contact breaker which is located at the front end.
Illustration
83.-A view o f the
S.U.
pressure p e t r o l pump w i t h part of t h e cover
c u t away t o show t h e magnet. The various letters are referred t o i n t h e accompanying
text.
Page One Hundred and Two