Chevrolet 1977 light duty truck, Service Manual

Page: 399 / 861

fem ale fitting will fit bracket in only 1 position (except G
models), 2 positions (G models). W ith o u t twisting hose,
position fem ale end in bracket.
4. Install " U " clip.
5. Attach pipe to fem ale fitting using a back-up
wrench on fitting; torque to specification, again be
careful not to bend bracket or pipe. Check to see th at
hose installation did not loosen fra m e bracket, re-torque
bracket if necessary.
6. Bleed system.
7. Lower vehicle from hoist.
BLEEDING HYDRO-BOOST/POWER
STEERING HYDRAULIC SYSTEM
T h e following procedure should be used to bleed the
power steering hydraulic system on hydro-boost vehicles.
N O T E : I f the power steering fluid has foam ed due
to low fluid level, it will be necessary to park the
vehicle for approxim ately one hour (reservoir cap
loose) so that the fo am can dissipate.
1. Raise the front o f the vehicle on a hoist so that
the tires are clear o f the floor.
2. Check reservoir and fill with G M Power
Steering Fluid (or equivalent).
N O T E : Leave the reservoir cap off- during entire
bleed procedure.
3. Install a rem ote control starter switch so that
engine can be cranked but not started.
C A U T IO N : Whenever the engine is cranked
remotely at the starter, with a special ju m p e r or
other means, the distributor prim ary lead m ust
be disconnected fr o m the negative post on the
coil.
4. C rank engine for 4 to 5 second intervals while
pou rin g fluid into the reservoir.
5. Fill reservoir and crank as in step 4 until system
will no longer accept fluid. It is n o rm al that fluid m ay
spill w hen cran k in g stops (it is the result o f air in the
system trying to escape). To prevent spilling, crank
engine.
6. R em ove rem ote control starter switch. Reinstall
d istrib u to r p rim a ry lead.
7. Start engine and allow to ru n 2 seconds.
8. Check and refill fluid reservoir if necessary.
9. Start engine and depress the brake pedal several
times while rotating the steering wheel from stop to stop.
10. T u rn engine off an d then p u m p brake pedal
4-5 times to deplete accum ulator pressure.
11. Check and refill fluid reservoir if necessary.
12. R epeat Steps 9, 10 and 11. Install p u m p
reservoir cap.
13. Remove vehicle from hoist.
PARKING BRAKE PEDAL OR HANDLE
Rem oval (Fig. 5-9 )
1. Place p ark in g brake pedal or handle in the
released position.
2.
Remove nuts from the engine c o m p a rtm e n t on
C, K and G models o r bolts from m ounting bracket on P
models.
N O TE: Take notice o f the spacers on P models for
reinstallation.
3. Disconnect the release handle rod at the parking
brake assembly end (C-K models).
4. Remove the bolts from the underside o f the
dash and lower the brake assembly (C-K-G Models).
5. C-K-G Models-Disconnect the cable ball from
the parking brake clevis an d remove the assembly.
P
Models^Remove the clevis pin and disconnect the
cable from the brake assembly; remove the
assembly.
In s ta lla tio n
Reverse the removal procedure. Torque all bolts and
nuts. A fter installing the clevis-pin, use a new cotter pin
to secure the clevis pin. Adjust the cable if necessary as
outlined below.
C A U TIO N :
See "C aution" on Page 1 o f this
section.
PARKING BRAKE ADJUSTMENT
A djustm ent o f p ark in g brake cable is necessary
w henever hold ing ability is not adequate or whenever
the center brake cables have been disconnected.
N O TE: The service brake must be properly
adjusted as a base for park in g brake adjustm ent;
conversely the p ark in g brake must be properly
adjusted for the service brake to function as
intended.
In s p e ctio n
If complete release o f the park in g brake is not
obtained, unless it is forcibly returned to its released
position, or if application effort is high, check parking
brake assembly for free operation. I f operation is sticky
or a bind is experienced, correct as follows:
1. Clean and lubricate brake cables and equalizer
with Delco Brake L ube (or equivalent).
2.
Inspect brake assembly for straightness and
alignm ent (replace if necessary).
3. Clean and lubricate p ark in g brake assembly
with Delco Brake Lube (or equivalent).
4. Checking routing o f cables for kinks or binding.
A djustm en t-F o ot Pedal Type
N O TE: Before adjusting park in g brake, check
service brake condition and adjustm ent.
1. Raise vehicle on hoist.
2.
Loosen the equalizer adjusting nut.
3. Apply p a rk in g brake 4 notches fro m fully
released position.
4. Tighten the equalizer nut until a m oderate drag
is felt w hen the re a r wheels are rotated forward.
C A U T IO N : See " Caution" on Page 1 o f this
section.