Bentley R Type - Hydraulic Master Cylinder. (Every 10,000 Miles); Dynamo. (Every 20,000 Miles)

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AND
ArmNnoN.
Before
commencing
to
adjust a
tappet,
it
should be
ascertained
that
the lower
tappet
operating
the
push
rod is
on the
base
circle
of
its
o_perating
cam.
This is best
don-e by
turning the crankshaft
by
hand
until the
valve
has opened
and closed,
and then cranking
round
balf a,,revolution
beyond
this
point.
The ball
ended
contact
screw (3)
is
screwed
into
the rocker
and
locked
with a
nut (4).
On
releasing,.the
nut the
screw can be
turned
by
means of
the
special spanner
provided.
The correct
clearance
for
the
inlet
rockers is
.oo6"
(.tyz
m/m.).
A feeler
gauge
is provided
in
the tool kit, and is
shown in
position
(6),
.
for
measuring
the
clearances.
As
each
contact
screw is
adjusted, its
locknut
should
be securely
tightened
up.
The correct
clearance
for
the exhaust
tappets
is
.ore'
(.3o5
m/m.|,
with
the engine
cold.
These
should
need no
attention between
dd-
carbonising
periods
of
the
engine.
5.-Air
Gleaner
(Standand
Type).
Remove
cleaner
element
lrom front
end
of silencer,
after unscrewing
the
wing-nut
and
taking off
end cover.
Carefully wash
element ii
petrol
or
paraffin
and
afterwards
oil
with
oil
"A".
Drain
off
excess
oil
before refitting.
It should
be
noted
that if
the
car
is
being
run
under
particul"tly
dSsty
conditions,
the element
may nped
cleaning
more
-frequently.
(See
page
53.)
$.-p69pg.
Oil lock bolts
and
hinges
with
oil
"A".
(See page
ro7.)
7.-Hydraulio
Mast6r
Gylinder.
Remove
the filler plug
(1
),
Fig. 20,
and check
the fluid level, top
up.if necessary
with
the
recommended
fluid
(see
page
z8) so
as
to
maintain
the level
at
one inch
below
the
filler
cap.
(Access
through
trap
door to battery.)
EVERY
20,000
MI.LE8
1.-Dynamo,
Inspect
brushes for
wear; to do
this, unscrew
securing screws
and
remove
cover
to
expose brushes.
(See page
86.)
If renewal
is necessary,
remove
dynamo, clean out
dust
and refit
new
brushes,
making
sure that they
are bedding
correctly
on
t[e
commutator.
Refit
dynamo.
c
33