Pic. 9.6. Parking brake drive adjusting unit: 1, 5 – rear parking brake drive cables; 2 - equalizer; 3 - adjusting nut; 4 – a forward cable of a drive of a parking brake.
You will need: keys "for 13", "for 17", a set of flat probes.
For a preliminary check of the correct adjustment of the parking brake drive, lift the drive lever up to the stop, while you should hear 7 or 8 clicks of the ratchet device. If the number of clicks does not fit within the specified interval or the car is not held by the parking brake, adjust the actuator. The adjusting unit for the parking brake drive is located at the bottom of the body base.
1. Set the correct clearances between the brake pads and wheel brake discs. To do this, firmly press the brake pedal several times with the parking brake lever lowered all the way down.
2. Place the vehicle on a lift or pit. If you are working on a pit, jack up the rear of the vehicle and place it on secure stands.
3. Disconnect the intake pipe of the additional muffler from the exhaust pipe (see Removal and installation of the main and additional mufflers), remove the suspension cushions from the muffler brackets and lower the muffler down, resting the intermediate pipe on the rear suspension cross member.
4. Remove the thermal screen of the additional muffler (see Removing and installing thermal shields).
5. Fully loosen the rear cables 1 and 5 (pic. 9.6) parking brake actuator, for which unscrew the adjusting nut 3 to the end of the threaded lug of the front cable 4 of the actuator, loosening its lock nut.
6. Insert a 1.2 mm thick feeler gauge between the parking brake release levers and the supports on the calipers of both rear wheel brakes (the location of the probe is shown in the photo with an arrow).
7. Screw on the adjusting nut 3 (see fig. 9.6) on the threaded tip of the front cable 4 until the movement of any expanding lever on the caliper begins.
NOTE: Step 7 requires an assistant to turn the adjusting nut and watch the spreader arms at the same time.
8. Remove the probes and check the free rotation of the wheels. If braking is felt on any wheel, repeat steps 5-7.
9. If, after re-adjustment, braking of the wheels is observed, repeat steps 5-7, replacing the 1.2 mm thick probe with a 1.0 mm thick probe.
10. If after adjustment using a 1.0 mm feeler gauge, wheel braking is observed, repeat the adjustment, each time replacing the feeler gauge with a thinner feeler gauge (through 0.2 mm), until the moment of completely free rotation of the wheels.
11. Tighten the front cable lug locknut.
12. If after all adjustment attempts it is not possible to achieve the desired result, check the condition of the brake pads of the brake mechanisms of the rear wheels, brake discs and drive cables. Replace defective parts (see relevant subsections) and adjust the parking brake actuator as described above.
13. Install the parts in the reverse order of removal.
14. Lower the car on wheels.
USEFUL ADVICE: In the absence of a probe, the following simplified version of the parking brake adjustment is acceptable.
1. Perform the operations described above in paragraphs. 1–4.
2. Turn the adjusting nut clockwise onto the threaded lug of the front cable and periodically check that the rear wheels turn freely.
Screw the adjusting nut onto the end of the cable until a well-perceptible resistance to their rotation appears.
3. Turn away an adjusting nut before the moment of full release of back wheels.
4. Place the vehicle on wheels, apply the parking brake, place the transmission control lever in neutral and try to manually roll the vehicle. If this succeeds, the drive is not adjusted correctly or is defective. In this case, repeat the adjustment, making it more carefully.
If repeated adjustment does not lead to the desired result, see point 12.
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