Manitowoc Grove 5540F Service Manual page 391

5540F/YB5515 SERVICE MANUAL
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4. Next, slide the sprag clutch out. Inspect the sprag clutch
closely for abnormal war, 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
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.
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 in any component isdefective.
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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
FIGURE 11-112
is no need for further
FIGURE 11-113
11-47
be placed between the press and bushing. This will
protect the busing from damage. Be certain the bushing
flange is against the shoulder in the outer race
(Figure 11-114).
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2. Turn the assembly over and install the sprag clutch in
the bore of the outer race (Figure 11-115).
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3. Press the remaining bushing against the race.Again,
make sure the bushing is against the shoulder.
4. Next, install a spag bushing retainer, then a snap ring on
the inner race (Figure 11-116). Be sure the snap ring is
seated in the snap ring groove.
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5. Slide the inner race through the bushings and sprag
clutch. The race will have to be rotated in the
STRUCTURALS
11
FIGURE 11-114
FIGURE 11-115
FIGURE 11-116