26
Always coat O-rings, bearings, bushings and the rub-
ber parts of seals with oil or grease during assembly.
Inspect all parts for wear, nicks, scratches and damage
that would render them unusable. If a part is question-
able, it is better to replace it rather than take a chance
on premature failure when the hoist is placed back in
service.
If the hoist was disassembled only to replace damaged
seals after a short period of service, it is not necessary
to replace the bearings. Experience and common
sense, along with a good inspection, will determine if
they can be used again.
Finally, the shafts and carrier should be checked
where there is roller or thrust washer contact. The
same surface and material conditions that are detri-
mental to the life of the bearing and thrust washer also
apply to the contact areas on the shaft and carrier.
The thrust washer contact areas should be free from
any surface irregularity that causes excessive abrasion
or friction.
The rollers should not exhibit any surface irregularities.
If the rollers show any sign of spalling, corrosion, dis-
coloration, material displacement or abnormal wear,
the bearings should be replaced. Likewise, the cage
should be inspected for unusual wear or deformation,
particularly the cage bars. If there is any damage that
will impair the cage’s ability to separate, retain and
guide the rollers properly, the bearing should be
replaced.
Thoroughly clean all of the parts in a good grade of
cleaning solvent; one that is not flammable, not toxic
and will not cause skin rashes. If necessary, use rub-
ber gloves.
CLEAN AND INSPECT
At regular service intervals, the cage and roller bearing
assemblies and thrust washers in the planet carrier
assemblies should be inspected to insure beyond any
doubt that they will function properly when re-installed.
Always replace O-rings, seals and spiral pins.
Sometimes it is permissible to reuse bearings and
bushings . . . it depends on how much use they have
had.
Use a sealing compound on the outside diameter of
seals and a light coat of thread sealing compound or
sealing tape on pipe fittings and plugs. Be careful not
to get this compound or tape inside parts and pas-
sages which conduct oil.
Summary of Contents for C2H150A
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