30
OVERRUNNING CLUTCH SERVICE
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 replace-
ment, the entire overrunning clutch assembly must be re-
placed. Carefully note the relative orientation between the
inner and outer races, and the direction of free rotation of
the inner race. The clutch MUST be reassembled correctly
for proper hoist operation.
Disassembly
1. Remove one of the retaining rings (Item 47) from the
outer race (Item 42). Push the inner race (Item 50),
bearings (Item 44) and overrunning clutch (Item 46)
through the outer race.
2. Use a small punch and hammer to tap one of the bear-
ings (Item 44) 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.
Assembly
1. If both bearings (Item 44) have been removed from the
inner race, install one of them now.
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
47) 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 CH210 hoists. The drawings show each type properly
assembled.
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.
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,
injury, or death. It is generally recommended to replace
the entire clutch assembly if any component is defec-
tive. For these reasons, the overrunning clutch assem-
bly should be disassembled for inspection only if the
hoist has exhibited any unusual operation that would
point toward a clutch malfunction, or the overrunning
clutch assembly shows external signs of mechanical
damage.
14 TOOTH INTERNAL SPLINE
Input Spline Side
Input Spline to rotate freely
in counterclockwise direction
when viewed from input spline
13 TOOTH INTERNAL SPLINE
Input Spline Side
Input spline to rotate freely in
CCW direction when viewed
from input spline side.
Correct location of
internal retaining ring