Support the car with jack stands and remove the wheel. a Using a screwdriver, carefully pry the brake pads away from the disc.
Pry off the hub cap with a wide screwdriver and remove it.
Remove the contact spring of the radio interference suppressor (see arrow).
Loosen clamping nut bolt (9d).
Tighten the hub at the same time (9) and a nut so that the hub no longer goes further. Then turn the nut back about 60' and loosen the tension by tapping on the stub axle (5a) wooden mallet. The figure also shows the outer wheel bearing (9s).
The axial clearance of the bearing is measured using a dial gauge and a suitable support. The nominal value of the gap is 0.01-0.02 mm.
Set the dial gauge to a load of 2 mm. Thus, even before the start of the test, it will show a gap of 2 mm.
Measure the clearance by pulling hard on the brake disc and then pressing it down. Before each measurement, it is necessary to turn the hub several times.
Warning: This may happen. that during measurement the hub will not turn. In the absence of special tools, the gap should be adjusted so that it is not felt at all. Subsequently, the gap will need to be checked in the workshop.
Tighten the clamping nut bolt and recheck the axial clearance of the bearings.
Install contact spring.
Apply about 15 g of high temperature roller bearing grease to the hub cap. On machines produced before November 1982, remove the old grease from the cap and fill it with new.
Install the hub cap in place by lightly tapping it with a wooden mallet.
Reinstall the front wheel, lower the machine and tighten the wheel bolts in a diagonal sequence.