UAZ -374195 Operation Manual page 91

a — anchor stud marks;
1 — anchor studs; 2 — shield; 3 — orifices for visual inspection 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
If the drum working surface has deep notches and burrs or wears
unevenly, rebore the drums from its central orifice.
The maximum permissible diameter of the 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.
The air gap between the shoes and the drum is restored automatically
as the linings wear.
Check the linings wear through the orifices in the shields. Unplug
the orifices, inspect the linings (their thickness shall not be less than 2.5
mm), plug the orifices.
Replace the linings in case of their excessive wear (the rivets are
sunk less than 0,5 mm).
When replacing the worn shoes or linings move the piston with the
thrust ring deep into the cylinder for putting the drum on the shoes freely.
Fig. 9.29. Rear Wheel Brake:
91