MK Diamond Baldor Motor User Manual
Page 26
3-4 Maintenance & Troubleshooting
MN408
Without Grease Provisions
Note: Only a Baldor authorized and UL or CSA certified service center can disassemble a UL/CSA listed
explosion proof motor to maintain it’s UL/CSA listing.
1. Disassemble the motor.
2. Add recommended amount of grease to bearing and bearing cavity. (Bearing should be about 1/3 full of
grease and outboard bearing cavity should be about 1/2 full of grease.)
3. Assemble the motor.
Sample Relubrication Determination
Assume - NEMA 286T (IEC 180), 1750 RPM motor driving an exhaust fan in an ambient temperature of 43 ºC
and the atmosphere is moderately corrosive.
1. Table 3-2 list 9500 hours for standard conditions.
2. Table 3-3 classifies severity of service as “Severe”.
3. Table 3-5 shows that 1.2 in
3
or 3.9 teaspoon of grease is to be added.
Note: Smaller bearings in size category may require reduced amounts of grease.
Shaker Duty Motors only
Caution:
Shaker Duty motors must be properly lubricated prior to Start Up to prevent damage. See Table 3-6.
Lubrication should be performed before Start Up and at regular maintenance intervals.
Follow these recommendations to ensure proper lubrication.
Recommended Lubricant
For ambient temperatures between −15 ºF to 120 ºF the following lubricants are recommended:
Mobil PolyrexEM, Texaco Premium RB, Exxon Unirex N−2.
Do not mix greases unless compatibility has been checked and verified.
Table 3-5 Lubrication Volume
NEMA Frame Size
Volume in Cubic Inches
Normal Duty
Severe Duty
Extreme Duty
Start Up
Relub
Start Up
Relub
Start Up
Relub
184TY
1.4
0.5
1.4
0.5
2.7
0.5
215TY
1.6
0.5
1.6
0.5
4.5
1
256TY
7
1
11
2
286TY
9
1
15
3
Lubrication Frequency
Normal Duty 8 hours per day (16 hours per day in a clean environment). Lubricate every 2 months.
Severe Duty 16 hours per day or more in a dirty environment (corrosive atmosphere, chemical fumes, acids,
alkalies or extreme high humidity). Lubricate every month or 700 hours of operation.
Extreme Duty operation in extremely dirty or dusty environments and high ambient temperatures exceeding
104 ºF (40 ºC). Lubricate twice a month or 350 hours of operation.
Lubrication Procedure
1. Locate the grease inlet and outlet. Clean the areas.
2. Remove the plug(s) and install a grease fitting in the inlet if grease fitting is not already installed.
3. Add the recommended amount of lubricant.
4. Run the motor for two hours with the outlet plug removed.
5. Install outlet plug.
Note: To loosen hardened grease it may be necessary to insert a rod or wire into the grease inlet and outlet
holes.