K 3500 Truck 4WD V6-262 4.3L (1988)
FIGURE 6
d.
Install wheel and tire assembly on hub and torque to 70 N-m (125 lb.ft.). See figure 6 for torque sequence.
C.Service Brake Adjustment
Service brakes must be adjusted after installation of new drums and brake shoes.
1.
Bleed rear brake lines and cylinders as follows:
a.
If it is known that no air has been introduced into the master cylinder, it is only necessary to bleed the two rear wheel cylinders and
lines.
b.
Fill master cylinder reservoir with brake fluid. Use Delco Supreme 11 brake fluid 12345347 or Dot-3. Maintain fluid level in
reservoir during the bleeding operation.
c.
Attach a hose to the wheel cylinder bleeder screw. Immerse opposite end of hose in a container partially filled with clean brake
fluid. Bleed right rear wheel first.
d.
Slowly depress the brake pedal one time and hold.
e.
Loosen the bleeder screw to purge the air from the wheel cylinder.
f.
Tighten the bleeder screw and slowly release the pedal.
g.
Wait 15 seconds, then repeat this sequence including the 15 second wait until all air has been purged from the wheel cylinder.
h.
Repeat procedure with left rear wheel.
i.
Check the brake pedal for sponginess and the brake warning lamp for an indication of an unbalanced pressure. Repeat entire
bleeding procedure to correct either of these conditions.
2.
Adjust service brakes:
a.
Remove adjuster hole cover.
b.
Adjust brake adjusting screw until wheel can just be turned by hand.
c.
The brake drag should be equal at both wheels.
d.
Back off adjusting screw 33 notches.
Important
Brakes should have no drag after the screw has been backed off about 15 notches. If a heavy drag is present, refer to parking brake adjustment in
following paragraph.
