Buick LeSabre 1965 Service Manual page 539

BRAKES
SERVICE 9 - 1 7
2. Disconnect rear brake cable
conduits from rear brake backing
plates and from clips on lower
control arms and frame.
3. Slide each conduit away from
backing plate as far as possible
and coat the cable sparingly with
Delco Brake Lubricant, or equiva-
lent. Also lubricate cable where
it passes through the sheave and
make sure cable slides freely in
sheave.
4. Slide conduit to within 2" of
normal position, then clean sur-
plus lubricant from cable at back-
ing plate to avoid forcing it into
brake assembly where it will get
on brake linings.
5. Connect c o n d u i t s to clips.
Lubricate areas marked with L
on Figure 9-4. Insert cables
through guides and frame tunnel
and attach to equalizer.
6. Adjust parking brake (sub-
par. a).
9 - 9 REPLACING BRAKE
PIPES
Since brake pipe assemblies (ex-
cept master cylinder to distribu-
tor pipe) are not available from
Buick Parts Warehouses, it is
therefore necessary to o r d e r
service bulk tubing and fittings
to make up any pipe assembly
which is needed. All brake pipes
must be made of tin, zinc or
copper coated wrapped steel tub-
ing with the ends double lap
flared. CAUTION: N e v e r use
copper tubing because copper is
subject to fatigue cracking which
would result in brake failure.
To make up a brake pipe assem-
bly, proceed as follows:
a. P r o c u r e the recommended
tubing and fittings of the correct
size. (Outside diameter of tubing
is used to specify size.)
b. Cut tubing to length. The cor-
rect length may be determined
either by measuring the old pipe
using a cord, or the length may
be found in Group 4.685 of the
Buick Chassis Parts Book.
c. Double lap flare tubing ends
using a suitable flaring tool such
as J-8051. Follow the instruc-
tions included in the tool set.
CAUTION: Make sure fittings are
installed before starting second
flare.
d. Bend pipe assembly to match
old pipe.
9 - 1 0 REPLACE OR RELINE
BRAKE SHOES—
REPAIR BRAKE
LININGS
The most satisfactory method of
replacing brake lining is to install
new shoe and lining assemblies.
This insures brake shoes that are
not distorted through use, and
linings properly riveted to shoes
and ground to correct radius by
accurate factory machinery.
Each brake shoe and lining set
listed under Group 5.017 is packed
in a carton containing two prima-
ry and two secondary shoe and
lining assemblies, enough for two
wheels. Sets a r e available in
standard size and also in .030"
oversize for use where brake
drums have been rebored.
Brake shoe lining sets are listed
under Group 5.018 if the old brake
shoes are to be relined. Each
lining set is packed in a carton
containing two primary and two
secondary linings, enough for two
wheels. Linings a r e s h a p e d ,
drilled, and ground to correct
thickness and radius, and are
packaged with enough rivets for
installation on shoes. Lining sets
are available in standard and
.030" oversizes.
Brake lining or shoe assemblies
must be selected according to
brake drum size as follows:
.050' BAR
(WITH ROUNDED ENDS)
1. Drum inside diameter under
12.050" -- use standard lining.
2. Drum inside
12.050" -- use
lining.
diameter over
.030" oversize
Figure 9-12—Measuring Brake
Drum Size
If the brake drum size is over
12.080", the drum s h o u l d be
replaced.
To assure an adequate supply,
several optional types of brake
shoe lining have been approved
for production and service. Since
the optional types of lining have
slightly different characteristics
it is important to use primary
and secondary shoe linings that
are matched according to engi-
neering specifications, and to use
the same type of linings on right
and left sides at front or rear end
of car. It is not possible to iden-
tify the various types of lining
by inspection; however, each car-
ton listed under Groups 5.017 and
5.018 contains correctly matched
primary and secondary linings.
The parts from several different
cartons should not be used at one
end of a car; however the linings
at front and rear brakes do not
have to be of the same type.
Brake linings are made of asbes-
tos for its heat resisting qualities
and compounds of bonding ma-
terial for strength. Some bonding