Chevrolet 30 Series 1967 Service Manual page 254

BRAKES 5-40
press serrated bolts (if used) into place, or install
bolts and nuts.
2. Slide drum and flange assembly over splines onto
output shaft.
3. On jobs with parking brake drum assembly attached
to output shaft by a center bolt place lockwasher and
special serrated flat washer on bolt. Install center
bolt applying 83-100 foot pounds torque on Power-
matic equipped vehicles, and 68-73 foot pounds with
other transmissions.
On vehicles with parking brake drum assembly re ­
tained to output shaft by a nut on shaft end, install
nut and torque to 230-280 foot pounds on 5 speed
transmissions. Install cotter pin.
4. Position propeller shaft flange against brake drum
(or output shaft flange). If removed, attach propeller
shaft center bearing hanger bracket to crossmember.
Replace all lockwashers
securely.
5. Install brake band and adjust brake as directed in
Brake Band Installation.
PARKING BRAKE CABLE—LUBRICATION
Refer to Maintenance and Adjustments in this section.
ANCHOR PIN REPLACEMENT-CHEVY VAN
1. Raise vehicle and place on jack stand.
2. Remove wheel and drum as outlined in this section.
3. Remove brake shoe pull back springs, link and guide
plate.
4. Disengage anchor pin lock and remove anchor pin re­
taining nut and washer and remove pin from flange
plate. (Threaded type).
Two type anchor pins are used in production. The
riveted type is not serviced and if failure or damage
should occur to either the anchor pin or flange plate,
both parts will have to be replaced and the threaded
type anchor pin used.
5. Position anchor pin to flange plate, install lock
washer and nut, and torque pin to 80 lb. ft. and lock
by peening over washer tabs.
. Install brake shoe guide plate, link and pull back
6
springs.
7. Adjust brakes, install drum and wheel as outlined
previously in this section. Test brake operation.
HYDRAULIC BRAKE LINES AND TUBING
Hydraulic Brake Hose
These hoses require no service other than periodic
inspection for damage from road hazards or other like
sources. Should damage occur and replacement become
necessary, the following procedure is to be followed.
Removal
1. Separate hose from steel line by turning double flare
connector out of hose fitting.
2. Remove shaped retained spring from hose
fitting and withdraw hose from support bracket.
3. Turn hose fitting out of wheel cylinder inlet or
junction block.
Installation
1. If hose is to be installed in wheel cylinder,
and nuts and tighten
a. Install new copper gasket on cylinder end of hose
(male end).
b. Moisten threads with brake fluid and install hose
in wheel cylinder inlet.
2. For junction block installations,
a. Moisten threads on male end with brake fluid.
b. Turn male end into junction block and tighten
securely.
3. With weight of vehicle on wheels and suspension in
normal position (front wheels straight ahead) pass
female end of hose through support bracket, allowing
hose to seek its own position. Insert hex of hose
fitting into the point hole in support bracket in
1 2
position which induces least twist to hose (fig.
NOTE:
Do not twist hose unduly during this
operation as its natural curvature is absolutely
necessary to maintain proper hose-to-suspen­
sion clearance through full movement of the
suspension and steering parts.
4. Install " U" shaped retainer spring to secure hose in
support bracket.
5. Inspect by removing weight completely from wheel.
If working at front wheels, turn steering geometry
from lock to lock while observing hose position. Be
sure that hose does not touch other parts at any time
during suspension or geometry travel. If contact
does occur, remove hose retainer spring and rotate
the female hose end in the support bracket one or
two points in appropriate direction, replace retainer
spring and re-inspect as outlined in this paragraph.
. Place steel tube connector in hose fitting and tighten
6
securely.
7. Bleed all brakes as outlined in this section.
Hydraulic Brake Tubing
Hydraulic brake tubing used on all trucks is a double
Fig . 66—Brake Tube Support
).
6 6
CHEVROLET TRUCK SERVICE M ANUAL