GMC 1976 ZEO 6083 Maintenance Manual page 235

5- 1 6 BRAKES
turn, and in the same manner as the bleeding operat-
ion except that bleeder valve is opened 1-1/2 turns
and the fluid is forced through the pipes and wheel
cylinder until it emerges clear in color . Approxi-
mately two quarts of fluid is required to flush the
hydraulic system thoroughly .
When flushing is completed at all wheel cylin-
ders, make certain that master cylinder reservoir is
filled to proper level.
PARKING BRAKE ADJUSTMENT
Normal driver adjustment of the parking brake
can be done at the parking brake lever. The knob on
top of the lever can be used to increase or decrease
the tension on the cable (figure 4) .
If the tension on the cable cannot be adjusted at
the lever it should be adjusted at the intermediate
equalizer.
1 . Turn the adjusting knob on top of parking
brake lever counterclockwise until it comes up
against stop .
2. Apply and release parking brake lever.
3. Jack up rear wheels .
4. Loosen lock nut at intermediate cable equal-
izer as shown in Figure 5 .
Figure 4-Parking Brake Lever Knob
Figure 5-Loosening Intermediate Adjusting Nuts
5 . Back off front nut until drag is just removed
and lock .
6. Apply lever and re-adjust parking brake lever
knob to give a definite snap-over-center feel .
7. Fully release parking brake and rotate rear
wheels . No drag should be present.
8. Lower vehicle to floor.
Figure 6-Lanced Area in Backing Plate