General Machine Products 70202 Universal Swivel Sheave 25000 lb - Manual (Page 5)

5
The Model UV-25 sheave assembly has two locations to
be lubricated:
a. The ball bearing chamber between the inner and
outer race.
b. The hub section of the bearing in the sheave.
Both of these lubrication areas are lubricated at the fac-
tory during assembly. Subsequent lubrication checks
should be periodically performed consistent with the
working loads applied and the amount of time in service.
However, both lubrication areas should be checked and
lubricated as follows not less than every six months:
Ball Bearing Chamber - The lubrication fitting is lo-
cated at the top of the outer sleeve. The grease fitting is
not a ball check type. Forcing too much grease under
pressure when lubricating the chamber may distort the
"O" ring on both sides of the chamber. As a precaution,
first remove the two set screws on top of the outer
sleeve. Inject lithium based grease into the fitting, while
rotating the swivel section several times as you proceed.
When grease becomes apparent at the top of the cham-
ber, stop lubrication. Replace the two set screws.
Sheave - The bearing in the sheave is also initially lubri-
cated at the factory. The lubrication fitting, located on
the hub section of the sheave, is not a ball check type.
Inject lithium based grease into the fitting, until excess
grease is visible between the bearing and shaft.
The maintenance of any mechanical device should be
on-going. The operator should always be aware of lubri-
cant leakage or difficulty in rotating the swivel section.
Units which exhibit such operational problems should be
removed from service and repaired by a qualified me-
chanic or the factory. To achieve maximum life expec-
tancy, it is suggested that the springs, rollers and pins be
sprayed periodically with a light lubricant such as
CRC 3-36 or WD-40.
Lubrication