3-74
Fig. 3.237
Fig. 3.239
Fig. 3.238
■ INSPECTION
Inspect all the parts for wear or damage. Repair or
replace any defective parts with new ones.
① Inspect the wheel cylinder’s inner surface and
piston’s outer surface for sign of corrosion.
Measure the clearance between the piston and
cylinder.
Standard value: 0.03 - 0.10 mm
[0.0012 - 0.0039 in.]
Limit: 0.15 mm [0.006 in.]
② Visually check the piston cup for damage or
deformation, replacing any defective piston
cup with a new one.
③ Measure the brake lining thickness, and if
worn beyond the limit, replace with a new
one.
Unit: mm [in.]
3.5- to 4.0-ton
Standard size 7.67 [0.301]
Limit 1 [0.039]
(Wear allowance: 6.67 [0.263])
④ Visually check the brake drum inner surface
for scratches, nicks or uneven wear, and if
any defect is found, repair by grinding. If the
surface is badly scratched or worn beyond
repair, replace.
Unit: mm [in.]
3.5- to 4.0-ton
Standard size 314 [12.362]
Limit 316 [12.441]
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