Brake Hoses; Parking Brake Pedal Or Handle - Chevrolet 1980 Light Duty Truck Service Manual

5-16 BRAKES
1/8" (3 mm) for each double flare.
3. Double flare tubing ends using a suitable flaring tool
such as J-23530. Follow instructions included in tool set.
Make sure fittings are installed before starting second
flare.
CAUTION: Double flaring tool must be
used as single
produce a flare strong enough to hold the
necessary pressure.
4. Bend pipe assembly to match old pipe using a tubing
bender. Clearance of .75" (19 mm) must be maintained to
all moving or vibrating parts.

BRAKE HOSES

Inspection
The flexible hydraulic brake hose which transmits
hydraulic pressure from the steel brake pipe on the frame
to the rear axle and to the calipers should be inspected every
4 months or 6,000 miles (9 600 km) (heavy duty emission
vehicles), every 12 months or 7,500 miles (12 000 km) (light
duty emission vehicles). The brake hose assembly should be
checked for road hazard damage, for cracks and chafing of
the outer cover, and for leaks and blisters. A light and
mirror may be needed for an adequate inspection. If any of
the above conditions are observed on the brake hose, it will
be necessary to replace it.
Front Brake Hose
Removal (figs. 5-5 thru 5-7)
1. Raise vehicle on hoist.
2. Clean dirt and foreign material from both hose end
fittings.
3. Disconnect brake pipe from hose fitting using a
back-up wrench on fitting. Be careful not to bend frame
bracket or brake pipe. It may be necessary to soak the
connections with penetrating oil.
4. Remove "U" clip from female fitting at bracket and
remove hose from bracket.
5. Remove bolt from caliper end of hose. Remove hose
from caliper, and discard the two copper gaskets on either
side of fitting block.
Installation
1. Use new copper gaskets on both sides of fitting
block, wet bolt threads with brake fluid, then with fitting
orientation flange engaged with the caliper orientation ledge
on JB8 and JF9 (hose located in caliper gate on all except
JB8 and JF9), fasten hose to caliper; torque to specifications.
2. With weight of vehicle on suspension, pass female
fitting through frame or frame bracket. Fitting fits the
bracket in only one position. With least amount of twist in
hose, install fitting in this position. There should be no kinks
in hose.
3. Install "U" clip to female fitting at frame bracket.
4. Attach brake pipe to hose fitting using a backup
wrench on fitting; torque to specifications.
5. Inspect to see that hose doesn't make contact with
any part of suspension. Check in extreme right hand and
extreme left hand turn conditions. If hose makes any
contact, remove and correct.
flaring tools cannot
6. Bleed brake system.
7. Lower vehicle from hoist.
Rear Brake Hose
5-8)
Removal (Fig.
1. Raise vehicle on hoist.
2. Remove all three brake pipes from hose, two at
junction block and, with the use of a back-up wrench, one
on the female fitting at bracket. Be careful not to bend
bracket or pipes; use penetrating oil if necessary.
3. Remove "U" clip and take female fitting out of
bracket.
4. Observe position at which junction block is
mounted to the axle. When installing new hose be sure this
junction block is in the same position.
5. Remove bolt attaching junction block to axle.
Installation
1. Thread both rear axle pipes into junction block.
2. Bolt junction block to axle and then torque rear
pipes into block.
3. Pass female end of hose through bracket; female
fitting will fit bracket in only 1 position (except G models),
2 positions (G models). Without twisting hose, position
female end in bracket.
4. Install "U" clip.
5. Attach pipe to female fitting using a back-up
wrench on fitting; torque to specification, again be careful
not to bend bracket or pipe. Check to see that hose
installation did not loosen frame bracket, re-torque bracket
if necessary.
6. Bleed system.
7. Lower vehicle from hoist.

PARKING BRAKE PEDAL OR HANDLE

5-9)
Removal (Fig.
1. Place parking brake pedal or handle in the released
position.
2. Remove nuts from the engine compartment on C,
K and G models or bolts from mounting bracket on P
models.
Take notice of 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 of the dash
and lower the brake assembly (C-K-G Models).
5. Disconnect the cable ball from the
C-K-G Models-
parking brake clevis and remove the assembly.
Remove the clevis pin and disconnect the
P Models-
cable from the brake assembly; remove the assembly.
Installation
Reverse the removal procedure. Torque all bolts and
nuts. After installing the clevis-pin, use a new cotter pin to
secure the clevis pin. Adjust the cable if necessary as
outlined below.
NOTICE: See "Notice" on Page 1 of this section.
LIG H T T R U C K S E R V IC E M AN UAL