– 13 –
(2) Method of grease lubrication (replenishment)
The motors with open bearings and a grease over-stuffing
prevention structure are of either of the two configurations
below. Lubricate the motor of each configuration
according to the procedures below.
In each event, when removing the old grease and
charging the new, use care so as not to come into contact
with the rotating bodies such as the shaft.
a. Motor equipped with grease removal device
(a) Before charging the new grease, dispose of all the
old grease.
(b) Remove the grease removal device. [Refer to Fig.
7 (a).] Remove the old grease contained in the
grease removal device.
(c) Install the grease removal device once again.
Charge the specified amount of new grease
through the grease fitting. After charging the new
grease, you do not have to remove the grease
removal device until the next grease lubrication.
Lubricate the motor with the new grease while
operating the motor. The motor bears the "Grease
lubrication procedure" instruction plate. Be sure
to charge the amount of grease replenishment
specified on this instruction plate or in Table
12. When installing the grease removal device
again, be sure to install the device to the correct
orientation. The grease removal device has an
arrow on it. Be sure to install it in a manner that
this particular arrow is always directed towards
the shaft. (For a horizontal structured motor, the
grease removal device is located below the shaft.
Thus, the arrow must be directed upwards towards
the shaft.) [Refer to Fig. 7 (b).] If the grease
removal device is installed with a screw, be sure
to install it with the screw in the same manner and
condition as it was installed before.
(d) Do not charge the grease more than the specified
amount. Otherwise, too much grease may cause
the bearing temperature to rise excessively or may
cause the grease to leak through the shaft through
hole.
(e) You can install the grease removal device on
the left or on the right of the motor. In this case,
remove the cap on the other side of the motor with
a flathead screw driver or a similar tool as shown
in Fig. 7 (c). Then, install the grease removal
device there.
b. For tapered plug type
Remove the tapered plug from the oil discharge port
as shown in Fig. 7 (d). Charge it with the fresh grease
as gradually as possible to the specified amount while
operating the motor. In order to eliminate the old, dirty
grease, leave the discharge port open for about 20
minutes after charging the fresh grease so that the old
grease naturally comes out. Then, tighten the tapered
plug.
(Nagoya Works B904138-9)
Fig. 7 (a)
(Nagoya Works B904138-5)
Fig. 7 (C)
Grease
removal device
(Direct the arrow towards the shaft.)
Shaft
Fig. 7 (b)
Grease gun
Remove
the tapered plug.
Grease lubrication
procedure instruction plate
(Nagoya Works B750058-5)
Fig. 7 (d)