Grain Systems Bucket Elevtors, Conveyors, Series II Sweeps PNEG-1579 - Manual (Page 68)

56 12" & 16" Series II Sweep PNEG-720-G2
Maintenance
2. LUBRICATION
A. LUBRICATION – ELECTRIC MOTORS
Electric motors supplied for use on Series 2 Sweeps are properly lubricated at the time of their
manufacture. It is not necessary to lubricate them at the time of installation unless the motor has
been in storage for a long period of time, 1 year or longer. Some motors may be factory
lubricated and sealed for the life of the bearings. Overgreasing the bearings can cause
premature failure of the motor. The amount of grease added must be carefully controlled.
B. PROCEDURE FOR LUBRICATION OF ELECTRIC MOTORS
1.) Stop motor. Disconnect and lock out of service.
2.) Follow all safe bin entry procedures and wear all required personal protective equipment.
3.) Remove contaminants from grease inlet area.
4.) Remove filler and drain plugs.
5.) Check filler and drain holes for blockage and clean as necessary.
6.) Add proper type and amount of grease. See the following chart for amount of lubricant. Too
much grease or injecting grease too quickly can cause premature bearing failure. Take one
minute or so to slowly inject the recommended amount of grease.
7.) Wipe off excess grease and replace filler and drain plugs. Do not run motor without the
grease and drain plugs installed.
Note: It is very important to keep the grease clean. Mixing dissimilar grease is not
recommended.
C. TYPE OF LUBRICATION
A polyurea mineral oil NGLI grade 2 type grease is to be used for lubrication of the electric
motors. Grease meeting this specification include:
1.) Chevron SRI #2
2.) Exxon-Mobile Polyrex EM
3.) Texaco Polystar RB
D. FREQUENCY OF LUBRICATION
Motors should be relubricated after storage of one year or more or at the beginning of each
season. The following chart gives the amount of grease to be added.