Table of Contents
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Section 3
Maintenance & Troubleshooting
General Inspection
Lubrication & Bearings
Type of Grease
Lubrication Intervals
NEMA / (IEC) Frame Size
NEMA / (IEC) F
Up to 210 incl. (132)
Over 210 to 280 incl. (180)
Over 280 to 360 incl. (225)
Over 360 to 5800 incl. (300)
*
Lubrication intervals are for ball bearings. For vertically mounted motors and roller bearings, divide the lubrication
interval by 2.
** For motors operating in this speed range, contact Baldor for lubrication recommendations based on specific motor
and application.
MN400
WARNING:
UL rated motors must only be serviced by authorized Baldor
Service Centers if these motors are to be returned to a flammable
and/or explosive atmosphere.
Inspect the motor at regular intervals, approximately every 500 hours of operation or
every 3 months, whichever occurs first. Keep the motor clean and the ventilation
openings clear. The following steps should be performed at each inspection:
WARNING:
Do not touch electrical connections before you first ensure that
power has been disconnected. Electrical shock can cause serious
or fatal injury. Only qualified personnel should attempt the
installation, operation and maintenance of this equipment.
1.
Check that the motor is clean. Check that the interior and exterior of the motor
is free of dirt, oil, grease, water, etc. Oily vapor, paper pulp, textile lint, etc. can
accumulate and block motor ventilation. If the motor is not properly ventilated,
overheating can occur and cause early motor failure.
2.
Use a "Megger" periodically to ensure that the integrity of the winding insulation
has been maintained. Record the Megger readings. Immediately investigate
any significant drop in insulation resistance.
3.
Check all electrical connectors to be sure that they are tight.
Bearing grease will lose its lubricating ability over time, not suddenly. The lubricating
ability of a grease (over time) depends primarily on the type of grease, the size of the
bearing, the speed at which the bearing operates and the severity of the operating
conditions. Good results can be obtained if the following recommendations are used in
your maintenance program.
A high grade ball or roller bearing grease should be used. Recommended grease for
standard service conditions is Polyrex EM (Exxon Mobil).
Equivalent and compatible greases include:
Texaco Polystar, Rykon Premium #2, Pennzoil Pen 2 Lube and Chevron SRI.
− Maximum operating temperature for standard motors = 110° C.
− Shut−down temperature in case of a malfunction = 115° C.
Recommended lubrication intervals are shown in Table 3-1. It is important to realize that
the recommended intervals of Table 3-1 are based on average use.
Refer to additional information contained in Tables 3-2 and 3-3.
Table 3-1 Lubrication Intervals *
Si
10000
**
Rated Speed - RPM
6000
3600
2700 Hrs.
5500 Hrs.
**
3600 Hrs.
* 2200 Hrs.
*2200 Hrs.
25
1800
1200
12000 Hrs.
18000 Hrs.
9500 Hrs.
15000 Hrs.
7400 Hrs.
12000 Hrs.
3500 Hrs.
7400 Hrs.
Maintenance & Troubleshooting 3-1
900
22000 Hrs.
18000 Hrs.
15000 Hrs.
10500 Hrs.
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