Weir Warman 650 M200-MCR-G, Manual, Page: 121 / 287

TOROMOCHO PROJECT - WEG MOTORS
TAG´s :
210-PP-001-M 210-PP-003-M 210-PP-101-M
210-PP-002-M 210-PP-004-M
BEARING LUBRICATION INTERVALS AND AMOUNT OF GREASE
GREASE TYPE: MOBIL POLIREX EM
4 - MAINTENANCE
A well-designed maintenance program for electric motors, when correctly used, can be summed up as: periodical
inspection of insulation levels, temperature rise, wear, bearing lubrication at the occasional checking of fan air flow.
Inspection cycles depend upon the type of motor and the conditions under which it operates.
4.1 - CLEANLINESS
Motors should be kept clean, free of dust, debris and oil. Soft brushes or clean cotton rags should be used for cleaning.
A jet of compressed air should be used to remove non-abrasive dust from the fan cover and any accumulated grime
from the fan and cooling fins. Terminal boxes fitted to motors with IP-55 protection should be cleaned; their terminals
should be free of oxidation, in perfect mechanical condition, and all unused space dust-free. Motors with IP(W) 55
protection are recommended for use under unfavourable ambient conditions.
4.2 - LUBRICATION
Motors made up to frame 160 are not fitted with grease fitting, while larger frames up to frame 200 this device is
optional. For frame 225 to 355 grease fitting is supplied as standard. Proper Lubrication extends bearing life.
Lubrication Maintenance Includes:
a) Attention to the overall state of the bearings;
b) Cleaning and lubrication;
c) Careful inspection of the bearings.
Bearing temperature control is also part of routine maintenance. The temperature of bearings lubricated with suitable
grease as recommended under item 4.2.2 should not exceed 70°C. Constant temperature control is possibl e with the
aid of external thermometers or by embedded thermal elements. WEG motors are normally equipped with grease
lubricated ball or roller bearings. Bearings should be lubricated to avoid the metallic contact of the moving parts, and
also for protection against corrosion and wear. Lubricant properties deteriorate in the course of time and mechanical
operation and, furthermore, all lubricants are subject to contamination under working conditions.
For this reason, lubricants must be renewed and any lubricant consumed needs replacing from time to time.
4.2.1 - LUBRICATION INTERVALS
To apply correct amount of grease is an important aspect for a good lubrication.
Relubrication must be made based on the relubrication intervals Table. However, when a motor is fitted with a
lubrication instructions plate, these instructions must be followed. For an efficient initial bearing lubrication, the motor
manual or the Lubrication Table must be followed. If this information is not available, the bearing must be greased up to
its half (only the empty space between the moving parts).
When performing these tasks, care and cleanliness are recommended in order to avoid penetration of dust into the
bearings.
4.2.2 - QUALITY AND QUANTITY OF GREASE
Correct lubrication is important!
Grease must be applied correctly and in sufficient quantity as both insufficient or excessive greasing are harmful.
Excessive greasing causes overheating brought about by the greater resistance caused on the rotating parts and, in
particular, by the compacting of the lubricant and its eventual loss of lubricating qualities.
This can cause seepage with the grease penetrating the motor and dripping on the coils or other motor components.
A lithium based grease is commonly used for the lubrication of electric motor bearings as it has good mechanical
stability, insoluble in water.
Greases for standard motors
This grease should never be mixed with different base greases.
More details about the greases mentioned above can be obtained at an authorized service agent or you can contact
WEG directly. For special greases, please contact WEG.
4.2.3. LUBRICATION INSTRUCTIONS
ITEM QTY TAG NUMBER
OUTPUT
(HP)
POLES FRAME INTERVAL
TYPE QTY GREASE TYPE QTY GREASE
1 3 280-PP- 6,7,8 75 4 444/5HP 7322BE 60g 6316 C3 34g 4195h
2 3 210-PP- 95,96,97 60 4 404/5HP 7316BE 34g 6314 C3 27g 7560h
3 2 210-PP- 99,100 20 4 286HP 7312BE 20g 6211 C3 11g 20000h
4 1 251-PP- 20 200 4 449HP 7322 BE 60g 6319 C3 45g 2569h
FRONT BEARING REAR BEARING