Overrunning Clutch Service - BRADEN CH400B Installation Maintenance And Service Manual

44
58
46
NOTE: Outer race (Item 42), Inner race (Item 50) and
overrunning clutch (Item 46) are NOT SOLD individually
as replacement parts. If any of these parts require re-
placement, the entire overrunning clutch assembly must
be replaced. Carefully note the relative orientation be-
tween the inner and outer races, and the direction of free
rotation of the inner race. The clutch MUST be re-assem-
bled correctly for proper hoist operation.
The polished surfaces of the inner and outer race and
the overrunning cams must be perfectly smooth to en-
sure positive engagement of the clutch. The slightest
defect may reduce clutch effectiveness, which may lead
to loss of load control and result in property damage,
personal injury, or death. It is generally recommended
to replace the entire clutch assembly if any component
is defective. For these reasons, the overrunning clutch
assembly should be disassembled for inspection only
if the hoist has exhibited any unusual operation that
would point toward a clutch malfunction, or the overrun-
ning clutch assembly shows external signs of mechani-
cal damage.
DISASSEMBLY
1. Remove one of the retaining rings (Item 44) from the
outer race (Item 42). Push the inner race (Item 50),
bearings (Item 58) and overrunning clutch (Item 46)
through the outer race.
2. Use a small punch and hammer to tap one of the bear-
ings (Item 58) off of the inner race. The overrunning
clutch can now be removed from the inner race. Close-
ly inspect the overrunning clutch and the polished sur-
faces of the inner and outer race for wear, cracks, pit-
ting, corrosion or mechanical damage. Closely inspect
the bearings for any signs of damage, wear, corrosion,
pitting or heat discoloration.
NOTE: Remove bearing from long end of inner race
first.

OVERRUNNING CLUTCH SERVICE

42
50
58
ASSEMBLY
Failure to assemble the overrunning clutch assembly
with all parts oriented correctly may result in reduced
brake effectiveness, which may lead to loss of load con-
trol and result in property damage, injury, or death.
1. If both bearings (Item 58) have been removed from the
inner race, install one of them now.
44
2. Install the overrunning clutch onto the inner race. Ro-
tate the inner race slightly to get the clutch started onto
the inner race.
3. Install the other bearing onto the inner race.
4. The outer race should have one retaining ring (Item
44) installed in one end. Carefully slide the inner race,
with bearings and clutch, into the outer race. Install the
other retaining ring into the outer race.
Shown below are the two types of clutch assemblies used
in CH400B hoists. The drawings show each type properly
assembled for standard rotation.
INPUT SPLINE END TO ROTATE
FREELY IN CW DIRECTION WHEN
VIEWED FROM INPUT SPLINE END
SAE "C"
INPUT SPLINE END TO ROTATE
FREELY IN CW DIRECTION WHEN
VIEWED FROM INPUT SPLINE END
SAE "D"
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INPUT SPLINE END
INPUT SPLINE END