The parking brake must hold the vehicle on a 25% slope when the parking brake lever is moved 15-20 teeth (clicks) of the ratchet
To check the correct adjustment of the parking brake, find a flyover or loading ramp near the parking lot of your car with a height of H \u003d 1.25 m with an entrance length of L \u003d 5 m.
This ratio corresponds to a slope of 25%
In the absence of such a ramp for a simplified check of the parking brake, place the car on a level area.
Place the shift lever in neutral, fully raise the parking brake lever.
Get out of the car and try to move it. If you succeeded, you need to urgently adjust the parking brake actuator
Disassembly of the parking brake mechanism
It is more convenient to work on a viewing ditch.
Lower the parking brake lever down to the stop.
We unpin and take out the equalizer axis.
With two "24" wrenches, we unlock the nuts of the rear fastening of the central cable sheath and completely unscrew the outer nut.
Using the “10” key, we unscrew the bolt securing the cable to the cross member bracket.
Disconnect the cable from the main bracket
Disconnect the cable from the additional bracket.
Remove the driver's seat. Using the “24” wrench, we unscrew the nut of the front fastening of the central cable by 2–3 turns.
Raise the edge of the rug and use the key "10" to unscrew the six nuts securing the mechanism to the floor
Remove the connector from the parking brake switch
Remove the cable bracket
Remove the mechanism.
Unpin the lever axis
Remove the lever axis.
Retract the lever
Remove the cable axis from the lever
Retrieve the cable itself
We assemble the mechanism in the reverse order, lubricating the lever and cable axles with any grease. After installation, we adjust the drive.
Replacing the parking brake cables
If necessary (corrosion, damage), we replace the parking brake cables for what:
- remove the rear wheels;
- remove the brake drums and pads (see Repair of GAZ-2705 rear wheel brakes) .
With a “12” head, we unscrew the two bolts securing the cable to the brake shield.
Remove the cable from the hole in the shield.
Using two “22” wrenches, loosen the adjusting nuts of the cable end. We unscrew the extreme nut from the threaded part of the tip. We take out the cable from the slot in the bracket.
Unpin the equalizer axis with pliers
Remove the washer
Removing the axle
Having lowered the equalizer down, remove the cable from it. Disconnect the second cable in the same way
We install the cables in the reverse order, after which we adjust the drive.
Adjusting the parking brake actuator
Lower the parking brake lever to its lowest position.
Pry off with a screwdriver and remove two plastic plugs of the brake shield (the wheels have been removed for clarity).
Using the “17” head, loosen the eccentric nut of the brake mechanism by 1–2 turns.
With a long “9” head or a special tubular wrench, turn the eccentric bolt until resistance to rotation is felt, which is caused by the expansion of the pads.
The start of the block movement can also be determined through the viewing windows in the shield.
With a “17” head, we tighten the eccentric nut with a torque of 2.4–3.5 kgf.m. At the same time, we keep the bolt from turning with the “9” head.
Similarly, we adjust the brake mechanism on the other side of the car and install plastic plugs in the brake shields.
We eliminate the backlash between the tips of the cables and the depressions on the equalizer, for which: with two "24" wrenches, we loosen the tightening of the fastener nuts of the cable sheath and, by moving the nuts along the threaded part of the sheath, we achieve the elimination of the backlash between the cable end and the cavity on the equalizer.
Similarly, we eliminate the backlash at the other tip of the cable. Tighten the locknuts on both cables. In this case, the equalizer bar must be perpendicular to the longitudinal axis of the vehicle.
Using a ruler or tape measure, measure the distance between the equalizer and the front wall of the bracket. It should be within 144–150 mm.
If necessary, adjust the position of the central cable in the same way as adjusting the rear cables.
If after that there is a play between the tips of the rear cables and the equalizer, repeat the adjustment described above.
With a properly adjusted drive, the parking brake lever should not move more than 15 sector teeth (clicks).