STRUCTURAL CD3340B/YB4411
11-50
Published 04/07/2015 Control # 569-00
4. Next, slide the sprag clutch out. Inspect the sprag clutch
closely for abnormal wear, cracks, pitting, or corrosion.
Check small clips for breakage or bright spots which are
signs of excessive wear. Unless the outer race or
remaining sprag bushing is damaged or shows signs of
excessive wear, there is no need for further
disassembly. If disassembly is necessary, remove the
bushing according to the procedure covered in step 3.
All brake clutch assembly parts should be thoroughly
cleaned and inspected before assembly.
1. Press a sprag bushing into the outer race, using a
suitable press. A flat plate of approximately the same
diameter as the bushing flange outside diameter should
be placed between the press and bushing. This will
protect the bushing from damage. Be certain the
bushing flange is against the shoulder in the outer race
(Figure 11-127).
2. Turn the assembly over and install the sprag clutch in
the bore of the outer race (Figure 11-128).
3. Press the remaining bushing against the race. Again,
make sure the bushing is against the shoulder
4. Next, install a sprag bushing retainer, then a snap ring
on the inner race (Figure 11-129). Be sure the snap ring
is seated in the snap ring groove.
WARNING
The polished surfaces of the races and sprag cams must
be perfectly smooth to ensure positive engagement of the
clutch. The slightest defect may reduce brake clutch
effectiveness, which may lead to loss of load control and
result in property damage, personal injury, or death. It is
recommended to replace the entire brake clutch
assembly if any component is defective.
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