Bentley R Type - Page 63

TUB
BnaKrNG
SysrBu.
59
-
It is unlikely,
however,
that
the front
brakes
will wear
more rapidly
than
the
rear
brakes,
so,
provided
that they
are adjusted
whenever
adjustment
of the rear
brakes is
required,
no
trouble in
this
respect
need
be expected.
Low or
inconsistent
output
from
the
servo worrld
be indicated
bv
heavy or non-progressive
brake pedal
action,
together
with insufficieni
{ront
braking, in
which
case
the
servo
would
have
to be
dismantlecJ
to ascertain
the
cause
of
the
trouble.
As
this is
a
delicate
operation,
it
is
recommended
that
Messrs.
Bentley
r\Iotors
(r93r)
I-td.,6r
one
of
their
"Special
Retailers"
be
entrusted
with
this
work.
+ .light
pedal
acLion,
accompanied
by
defective
front
braking,
resulting
irr
the
rear
wheels
locking,
would
indicate
a fault
in
the
froit
braking
system.
An
excess
of front
braking
would indicate
a fault
in
the rear
brakes.
In
the
unlikely
event
of oil reaching
either
of
the rear
brakes,
the
self*seal
bearing
on
the rear
axle half
ihaft
will be
at fault.
Grease
catchers
are
_
provided
for
the front
hubs,
and provided
that
the
recommen{ed-grease
lrg
used
and
the quantity
fimited
to r}
ozs.
in each
hub,
this
should
not
be able
to
relch
the brake
linings.
Adjustments.
A separate
adjustment.
is_ provided
on
each
brake
carrier plate
to-.compensate
for
wear
of
the brake
shoe
linings,
and is
the^only
adjustment
provided
on
the
whole
system.
.
It is important
to note
that in
no
circumstances
should
adjustments
be
attempted
at
anlr.other
point,
for instance,
by
altering
the
lengths
of the
brake
rods.
These
are all
carefully
determined
du"ring
"t..iion
of the
chassis,
with
a
view
to
synchronisation
of
the
front"and.
rear
safety
stops,
which
ensure
that in
the
event
of failure
of any
part
of
the
system,
at
least
one pair
of brakes
will remain
available.
The
method
of adjustment
is
the
same
for
both
front
and rear
brakes,
with
the
exception
that
a
hand
wheel
is provided
on the rear
brake
adjusters,
while-
a
|"
B.S.F.
open-ended
tpa.rn..
must
be
used
*
tI:
sq-uaned
end
of
the
front
prake
adjusters'.
The
rear
adjusters
(2-,.
Fig. 19)
a1e
located
forward
of
the
-axle
tubes,
and
the front
adjusters
(1,
Fig.
18)
directly
below
the
steering
pivot
pins.
For
each complete
_toln
of the
adjusters,
four
"clicks"
will be felt,
and
betiveen
eaih
"click"
the
brake
shoes
are
expanded
towards
the
drum
approximately
.gr4u,
and
then
moved back
.oro", giving
an
incremental
adjustment
of
.oo4",
and
a running
clearance
oi
loto{
To adju_st
t_he
brakes,
rotate
the
adjusters
in
a
clockwise
direction
until
considerable
resistance
is felt.
This resistance
must
be
equal
for
all four
brakes,
and
should
the
last
"click"
on
any
one
adjuster'require
noticeably
-greater
force
to
obtain,
the
adjuster
shouid be
tuined
back
to
the previous
"click".
This
will
-give
the
correct brake
adjustment.