Cadillac 60 Series 1963 Shop Manual page 174

BRAKES
8-9
Fig. 8-8 Stoplight Switch
4. Check operation of stoplight.
c. Adjustment
Adjust switch action so that stoplight is on when
brake pedal is depressed 1/2 i n c h , Fig. 8-8.
Loosen front and rear nuts that hold stoplight
switch and move switch up or down until this
action is obtained. Tighten switch lock nuts se-
curely to prevent loss of adjustment.
11. Hydraulic Brake Hose Service
Hydraulic pressure is transferred from the
steel brake lines to the wheel cylinders by means
of flexible hoses. These flexible hoses are de-
signed and constructed to withstand any stress
that may be encountered during the course of
normal driving.
While the flexible hoses require no particular
servicing, they should be inspected every Spring
and Fall for damage that may occur from various
road hazards. Replace damaged hoses in follow-
ing manner:
a. Removal
1. Disconnect steel brake line from hose by
turning steel tube connector nut out of hose fitting.
Cap fitting to prevent dirt from entering brake
line.
2. Remove " U " shaped retainer from hose
fitting and withdraw hose from frame support
bracket.
3. Turn hose fitting out of wheel cylinder inlet
and remove copper gasket. If hose is to be re-
installed, cover end fittings to prevent dirt from
entering hose.
b. Installation
1. Install new copper gasket on cylinder end of
hose (male end).
2. Tighten hose in wheel cylinder inlet securely.
3. With suspension in normal position (front
wheels straight ahead) pass female end of hose
through frame support bracket, allowing hose to
seek its own position. Insert hex of hose fitting
into the 12 point hole in support bracket in po-
sition that induces least twist in hose.
NOTE: Do not twist hose any more than
necessary during this operation as its natural
curvature is absolutely necessary to maintain
proper hose-to-suspension clearance through
full movement of suspension and steering parts.
4. Install " U " shaped retainer to secure hose
in frame support bracket.
5. Inspect by turning steering from stop-to-stop
while observing hose position. Be sure that hose
does not touch other parts at any time during
suspension or steering travel. If contact does
occur, remove hose retainer and rotate female
hose end in support bracket one or two points in
appropriate direction, replace retainer, and
reinspect.
6. Place steel tube connector nut in hose fitting
and tighten securely, being careful not to damage
threads.
CAUTION: Never tighten hose in wheel cyl-
inder inlet with hose attached at frame ends as
this will twist the hose.
7. Bleed all brakes as outlined in Note 9.
12. Parking Brake Preliminary Checks
It is not always necessary to replace the parking
brake assembly or diaphragm in cases of an in-
operative parking brake automatic release. The
following checks should be performed as part of
your diagnosis to determine the cause and cor-
rection of parking brake trouble and to eliminate
unnecessary replacement of parking brake
components.
1. Check for damaged or kinked vacuum hoses
and for loose hose connections at parking brake
diaphragm, vacuum release valve at neutral safety
switch, and at engine manifold connection.
2. Check adjustment of neutral safety switch
and operation of vacuum release valve. Correct
as necessary and recheck parking brake operation.