Marshalltown SG87SH SURFACE SHARK Floor Grinder - Manual (Page 34)

PAGE 34 SG87Sh SuRFACE ShARK FLooR GRINDER
LUBRICATION REQUIREMENTS
Application: SG87SH SURFACE SHARK
Parts Required:
1 each, standard grease gun filled with one of the
following: ESSo beacon 325, Shell
Alvania #2, Chevron SRI, or equivalent.
1 each, container of dry film lubricant.
1) Lubricate the caster wheel bearings with a dry film
lubricant only. Dry film lubricants dry immediately upon
contact. use sparingly. Excess lubricant will attract the
fine grained, powdered materials produced during use
of the Floor Grinder that can directly affect bearing
service life.
Do not lubricate the caster wheels with any type of
grease material. Grease will attract foreign material
accumulations that can accelerate bearing wear.
2) The transmission shaft is supported by extra capacity,
ball bearings. bearing are lubricated at the time of
manufacture and do not require additional servicing
when placing the unit in initial service. The remote-
type, central lubrication system is a convenient method
for providing lubrication to bearings. FIGuRE29. Zerk
grease fittings can promote improper service schedules
and an excessive amount of overgreasing. Excess
grease escaping from around the bearing insert seals
will attract foreign material accumulations that can
drastically shorten seal life. Excessive amounts of
grease in the bearing race cavity can actually increase
friction and resulting heat increases that can also
dramatically shorten bearing service life.
FIGuRE 29
3) Standard bearing greasing intervals will range
from once every 8 hour work day to approximately
once every work week. Always maintain sufficient
grease around the circumference of the bearing insert
to provide its self-aligning feature and prevent the
formation of corrosion.
5) Do not apply belt dressing materials to the v-belt for
the purpose of minimizing slippage. These products
typically attract foreign material accumulations that
can accelerate component wear. Excessive v-belt
slippage can be eliminated with proper v-belt tension
and alignment.
ELECTRIC MOTOR SERVICE
Application: SG87SH SURFACE SHARK
The electric motor is capable of operating for many
years with a reasonably small amount of maintenance.
before attempting to service the motor, disconnect
the Floor Grinder from the power source. Clean
the motor surfaces periodically, preferably with a
vacuum cleaner. heavy accumulations of dirt and
dried materials will result in overheating and premature
failure of the motor.
The electric motor is equipped with higher capacity
ball bearings and under normal service and ambient
temperatures, should not require relubrication for many
years.
The seals utilized with the motor are intended to deliver
a longer service life in a concrete dust environment.
When replacing the seals, utilize only components
meeting the original factory specifications.
If you feel that the motor requires relubrication, contact
the local representative of the motor manufacturer
for specific information. Refer to your local yellow
Page listing or website. Additional service can also be
obtained from local service centers which are members
of the Electrical Apparatus Service Association
(EASA).
TROUBLESHOOTING
ELECTRIC MOTOR
Application: SG87SH SURFACE SHARK
MoToR FAILS To START
oN/oFF switch in the oFF position. Turn the switch to
the oN position.