Minimum lining thickness (without brake pad base plate) is 2 mm.
Shine a lamp through the hole in the wheel disk and check the thickness of the lining.
More precise control is carried out with the wheels removed.
With an ATE brake, the distance between the spring and the base plate is measured (see fig.).
Four 20-ruble Russian coins can be used to check the lining thickness of a floating caliper disc brake (An ordinary hexagonal pencil is quite suitable for the same purposes) (3). If one more coin can fit between the spacer spring (2) and support (1) overlays. That means it's time to change the pads.
In floating caliper disc brake firm "Girling" (pic.) raise the spacer spring; measure the thickness of the lining between the brake disc and support. To do this, use coins or a measuring ruler.
At the firm's brake "Girling" before checking the thickness of the lining, raise the spacer spring (2). The remaining numbers indicate: 1 - lining support; 3 - mounting bracket bolt (4).
In a cam disc brake: attach a ruler and measure as shown in fig. at the bottom.
For cam disc brakes, the residual lining thickness can be accurately measured with a straight edge after the corresponding wheel has been removed
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