lolls-lo~re Silver Shadow
B
Bentlev
T
Series
Worksho~
Manual
thoroughly. Inspect the diaphragm assembly and nylon
armature guide plate for damage or deterioration;
renew if necessary.
8. Before assembling the pump release the spring
blade retaining screw in the contact breaker sufficiently
to ensure that pressure is not applied to the tungsten
points and outer rocker. If pressure is applied at this
point during assembly, the correct setting of the
diaphragm cannot be obtained.
Solenoid housing and diaphragm-To fit
1.
When assembling the pump all cork and fibre
washers, gaskets and rubber
'0'
rings should
be
renewed.
2.
Place the armature spring in the solenoid housing
with the large diameter toward the solenoid.
3.
Before fitting the diaphragm, ensure that the
impact washer is fitted to the armature. This is a small
neoprene washer which fits into the armature recess.
4.
Fit the diaphragm by inserting the spindle into
the hole in the solenoid and screwing it into the
threaded trunnion in the centre of the rocker assembly.
5.
Screw in the diaphragm until the rocker will not
'toggle over'. This must not be confused with 'jamming'
the armature on the solenoid housing internal steps.
6.
On
fuel
pumps fitted
with
brass centralising
rollers, fit the eleven rollers by turning back the edge of
the diaphragm and dropping the rollers into the
solenoid recess. The pump should be held rocker end
downwards to prevent the rollers from falling out.
7.
Fit the contact blade and adjust the finger settings
by inserting a feeler gauge between the rocker finger
and solenoid housing. If necessary, bend the stop finger
to obtain a gap of between 0.065 in. and
0.075 in.
(1,65
mm.
and 1,90 mm.). Carefully remove the contact
blade.
8.
Hold the solenoid housing assembly in an ap-
proximately horizontal position and firmly, but steadily
push in the diaphragm spindle. Unscrew the dia-
phragm, alternatively pressing and releasing, until the
rocker just 'toggles over'.
9.
To set the diaphragm, unscrew to the nearest
hole and then unscrew a further four holes (two-thirds
of a complete turn). The diaphragm is now correctly
set.
10. On
fuel: pumps fitted
with
brass centralising
rollers, press the centre of the armature and fit the
retaining fork at the back of the rocker assembly.
This is necessary to prevent the rollers from falling
out when the solenoid
housiilg is placed on the bench
prior to fitting the body. It is not
intendcd to stretch
the diaphragm before tightening the body screws.
For fuel pumps fitted
with
nylon armature guide plates
carry out Operations
11
to
13
inclusive.
Chapter
K
FIG.
K9
FITTING
THE NYLON
ARMATURE
GUIDE
PLATE
1
Diaphragm
2
Solenoid recess
3
Nylon
guide
plate
11. Turn back the edge of the diaphragm and insert
one of the armature guide plate end lobes into the
recess beneath the diaphragm as shown in Figure K9;
ensure that the flat face of the guide plate is adjacent
to the diaphragm.
12. Carefully ease the guide plate into position
beneath the diaphragm.
13. Press each lobe of the guide plate into the recess.
In order to avoid distorting the guide plate it is most
important that the two end lobes are not pressed into
position until all other operations have been carried
out.
14. Repeat these operations for the remaining dia-
phragm assembly.
15. Fit the new joint washer to the body, ensuring
that the screw holes are correctly aligned.
16. Offer the solenoid housing to the body, making
sure that the seating between
them
is
correct.
17.
Line up the six securing screw holes ensuring that
the cast lugs on the solenoid housing are to the bottom.
Screw in the six setscrews until they are finger-tight
and then fit the earthing screw with its Lucar connector.
18. Fuel pumps fitted with brass rollers. Remove
the
roller retaining fork, tighten the body securing screws,
ensuring the rollers retain their positions; a displaced
roller will damage the diaphragm.
Fuel pumps fitted with nylon
armature
guide
plates.
Tighten the body securing screws.
19. Progressively tighten the securing screws on
opposite diameters.
20. Fit the contact blade and the condenser lead to
the pedestal with the
5
B.A.
screw and washer.
21.
Adjust the blade so that its contact points are a
little above the contact points on the rocker when the
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