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3.
Check the wheel cylinder for leakage.
4.
Check the brake linings for cracking, glazing, wear,
and contamination.
5.
Measure the brake lining thickness. Measurement
does not include brake shoe thickness.
Brake lining Thickness:
Standard:
3.9 - 4.5 mm (0.15 - 0.18 in)
Service Limit: 2.0 mm (0.08 in)
WHEEL CYLINDER
LININGS
6.
If the brake lining thickness is less than the service
limit, replace the brake shoes as a set.
7.
Check the bearings in the hub unit for smooth oper-
ation;
if
the bearing require servicing, refer to sec-
tion 18.
8. Measure the inside diameter of the brake drum
with inside vernier calipers.
Drum Inside Diameter:
Standard:
219.9 - 220.0 mm (8.657 - 8.661 in)
Service Limit: 221.0 mm (8.700 inl
INSIDE VERNIER CALIPERS
BRAKE DRUM
9. If the inside diameter of the brake drum is more
than the service limit, replace the brake drum.
10. Check the brake drum for scoring, grooves, and
cracks.
19-17
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Troubleshooting
