Eng
lish (US)
20
8.3 Motor lubrication
Electric motors are pre-lubricated from factory and do not require
additional lubrication before startup.
Motors with grease fittings must only be lubricated with approved
types of grease (see table below). Do not overgrease the
bearings. Overgreasing will cause increased bearing heat and
may result in bearing and motor failure. Do not mix petroleum
grease and silicon grease in motor bearings.
Bearing grease will lose its lubricating ability over time, not
suddenly. The lubricating ability of a grease (over time) depends
primarily on the following:
• The type of grease.
• The size of the bearings.
• The speed at which the bearings operate.
• The severity of the operating conditions.
Good results can be obtained if you use the following
recommendations in your maintenance program. It must also be
noted that pumps with more stages, pumps running to the left of
the performance curve and certain pump ranges may have higher
thrust loads. Pumps with high thrust loads must be greased
according to the next service interval level.
8.4 Motor lubrication schedule for motors with grease
fittings
New motors that have been stored for a year or more must be
regreased.
* The grease outlet plug must be removed before adding new
grease.
Severity of
service
Maximum ambient
temperature
Environment
Standard
+104 °F
(+40 °C)
Clean, little
corrosion
Severe
+122 °F
(+50 °C)
Moderate dirt,
corrosion
Extreme
> +122 °F
(+50 °C)
or class H
insulation
Severe dirt, abrasive
dust, corrosion
Service interval
Grease to add
NEMA/
(IEC)
Frame
size
Standard Severe
Extreme
Weight
Volume
[hrs]
[hrs]
[hrs]
[OZ./g]
[In
3
/tsp]
Up
through
210
(132)
5500
2750
550
0.3/8.4
0.6/2
Over
210
through
280
(180)
3600
1800
360
0.61/
17.4*
1.2/3.9*
Over
280 up
through
360
(225)
2200
1100
220
0.81/
23.1*
1.5/5.2*
Over
360
(225)
2200
1100
220
2.12/
60.0*
4.1/13.4*
Summary of Contents for CRN-H MAGdrive
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