UAZ PATRIOT Operation Manual page 142

wear to a thickness of 1.5–2.0 mm, replace the shoes on both
front brakes.
To replace the brake shoes unscrew bolts 16, remove carrier
18 and spring 1.
Check the brake disc. If its surface has deep notches and
burrs, remove it, clean and grind. When the disc wears to a
thickness of 20.4 mm, replace it.
Make sure that the crankcase has no leakage.
Check safety caps 5 and boots 8 for damages and proper
installation in seats, replace them if necessary.
Check the outer surface of bushes 10 in the area of boots 8 for
grease and lubricate them with UNIOL 2M/1 TU 38.5901243-
92 grease as required.
Move clip 3 until pistons 9 rest the inner surface of crankcase
17. Bypass valve 14 can be opened to ease the fluid displacement
from crankcase 17. Close valve 14 as soon as pistons 9 completely
sink into the crankcase. Before moving clip 3 uncap the master
1 — spring; 2 — shoes; 3 — clip; 4 — support; 5 — safety cap; 6 — snap ring;
7 — O-ring; 8 — protective boot; 9 — piston; 10 — bush; 11 — bolt; 12 —
screw; 13 — plug; 14 — proportioning valve; 15 — cap; 16 — spring carrier
bolts; 17 — crankcase; 18 — spring carrier
Fig. 9.30 Front disc brakes:
142