Replacing the front brake pads

A preliminary assessment of lining wear is carried out with the front wheels removed through the window in the caliper 6 (see fig. 6-11). If the thickness of the pads is small, it is necessary to dismantle the pads and measure their residual thickness.



Replace pads with new ones in the following cases:

• if the thickness of the overlays has decreased to 1.5 mm;
• the surface of the pads is oiled;
• there was a detachment of the friction lining from the frame of the shoe;
• overlays have large chips and deep furrows.

When replacing pads with new ones, it is necessary to replace the entire set - on the left and right wheels. It is necessary to install pads approved by GM-AVTOVAZ only. When doing this, make sure that all four pads of the set are of the same manufacturer and made at the same time.

If it is not planned to replace the pads with new ones, during dismantling, it is necessary to mark each pad, and during assembly, install the pads in the same places. Swapping pads can result in poor braking performance and uneven braking.


To replace pads, do the following:

• unpin and remove the axle of the upper clamping lever of the brake caliper, remove the clamping lever with springs;
• move up the caliper with the cylinder block until it is released from the lower clamping lever, remove the caliper and hang it on the technological hook, avoiding tension on the brake hoses;
• remove the worn brake pads from the grooves of the caliper guide (pic. 6-16);

• carefully inspect the pads, paying attention to the presence of chips, cracks, delamination from the frame;

• measure the residual thickness of the brake lining using a vernier caliper with an accuracy of at least 0.1 mm (pic. 6-17);
• if the thickness of the pads does not exceed 1.5 mm, replace the pads with new ones.
• check the condition of the protective caps of the pistons, the caps must be in the sockets and not damaged, if necessary, replace the caps;
• unscrew the cover of the reservoir of the hydraulic drive of the brakes and, carefully, so as not to damage the dust caps, sink the pistons into the cylinder block. When sinking, keep an eye on the level of the brake fluid, if necessary, remove part of the brake fluid from the reservoir;
• install new brake pads in the grooves of the guide;
• insert the lower guide bevel on the caliper under the lower pressure lever, press the caliper against the blocks, install the upper pressure lever with springs, insert the axle of the upper pressure lever from the side of the wheel and cotter it.