Figure 7-24.Push-button station with a pilot light.
With a clean screwdriver or similar tool, free the
relief hole of any hardened grease so that any excess
grease will run freely from the bearing. With the motor
running, add grease with a hand-operated pressure gun
until it begins to flow from the relief hole. This
procedure tends to purge the housing of old grease.
Figure 7-25.Control circuit with a pilot light.
It might prove dangerous to lubricate the motor
while it is running; follow the procedures with
the motor at a standstill.
Figure 7-26.Pilot light indicates when motor is not running.
After adding the grease, allow the motor to run
long enough to permit the rotating parts of the bearing
to expel all excess grease from the housing. This very
important step prevents overgreasing of the bearing.
Stop the motor and tightly replace the relief plug with
Before pumping grease into the grease fitting,
wipe it clean to prevent the grease from carrying dirt
into the fitting and bearing housing. Always remove
the relief plug from the bottom of the bearing before
using the grease gun. This action prevents applying
excessive pressure, which could rupture the bearing
seals inside the bearing housing.
Motors that are not equipped with the pressure-gun
fitting and the relief plug on the bearing housing
cannot be greased by the procedures described. Under
average operating conditions, the factory-packed
grease in the bearing housings of these motors is
sufficient to last approximately 1 year. When the first
year of service has elapsed and once a year thereafter
(or more often if conditions warrant), you should