UAZ PATRIOT Operation Manual page 144

a — anchor stud marks; 1 — anchor studs; 2 — shield; 3 — orifices for visual inspec-
tion of brake linings; 4 — wheel brake cylinder; 5 -bypass valve; 6,12 — brake shoes;
7 — safety cap; 8 — piston; 9 — O-rings; 10 -snap ring; 11 — release spring
the brake details from dust and dirt. The frequency depends on
vehicle operation conditions. Clean the drums more often in
summer and when driving dirty roads and less often in winter.
Sand the rear brake shoes when they get greasy. Replace the
greasy linings or keep them in clean gasoline for 20-30 min and
grind them with sand paper or a wire brush.
After the drums are removed, make sure that wheel cylinders
do not leek and are securely fixed to the shield. Pay attention
to the condition and installation of wheel cylinders safety caps
3 to the wear of the linings and to the condition of the brake
drum.
Safety caps must be tightly installed in piston and cylinder
seats and not damaged.
If the drum working surface has deep notches and burrs or
wear unevenly, rebore the drums from the central orifice. The
maximum permissible diameter of the working rebored brake
drum is 281 mm.
It is not recommended to change the brake drums between
the hubs as working surfaces of the drums will wobble more.
Fig. 9.32 Rear wheel brake (variation 2):
144