Note: Before starting work, read the warnings at the beginning paragraph 4, on the harmfulness of asbestos dust.
Examination
Note: To maintain uniformity and braking performance, both discs are replaced. if at least one needs to be replaced. At the same time, the brake pads are replaced with new ones.
1. Chock the rear wheels, apply the handbrake and raise the front of the vehicle. Install safety supports. Remove the corresponding wheel. When removing the wheels, wrap one bolt into the hubs so that the brake discs do not move relative to the hub. If necessary, use washers or old large nuts.
2. If you need to increase the review, remove the brake pads. Turning the disc, check the depth of the grooves and potholes. small potholes "have the right to be", but excessive ones indicate the need for replacement.
3. A common occurrence is the formation of a rusty crown around the perimeter of the disc, this can be removed if necessary. Check the top tire of the disc with a micrometer. Take measurements in several places. If at least in one place the thickness of the disc has decreased less than the permissible specifications, both disks must be replaced.
4. If there is a suspicion that the disc is bent, use a dial indicator or a ruler with a set of feeler gauges to check the runout of the disc and compare with the tolerances given in Specifications. To measure, secure the rim with at least two wheel bolts, using flat washers to ensure that the rim is correctly "sat" on the hub.
5. Measurements should be taken approximately 10 mm from the outer edge of the disc. Measure runout at several disc radii. If the disc runout is excessive, remove the disc and check that the mating surface of the disc and hub is absolutely clean. If the runout exceeds the allowable value, the disc must be replaced. But check the condition of the hub first - see chapter 10.
6. Check for disc cracks (especially around the wheel bolts). Replace disk if necessary.
Withdrawal
7. Turn away two bolts of fastening of a support to a rotary fist and remove a support. Tie the caliper to the suspension strut with a piece of wire so as not to stress the brake hose. If necessary, the bracket mounting bracket can be removed by unscrewing the mounting bolts, as described in paragraph 8.
8. If the disc is to be installed backwards, mark its position relative to the hub with paint or chalk. Turn away bolts of fastening of a disk to a nave, screwed in at disk check, and remove a disk. If the disk sits for a fee, help it come off with a rubber mallet.
Installation
9. Installation is the reverse procedure of removal. Pay attention to the following:
- A) The mating surfaces of the disc and hub must be clean and even.
- b) If available, align the previously applied marks.
- V) If installing a new disc, use a suitable solvent to wipe off the protective grease from the disc before installing it on the hub.
- G) Before installing, clean the caliper mounting bolts, put the bracket on the pads and tighten the mounting bolts to the prescribed torque.
- d) Install the wheel and lower the car. Tighten the wheel bolts to the specified torque. Finally, press the brake pedal several times so that the pads approach the disc and take up a working position on it.
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