1-4 General Information
MN605
5. Motors with anti
−
friction bearings are to be greased at the time of going into extended storage with
periodic service as follows:
a. Motors marked “Do Not Lubricate” on the nameplate do not need to be greased before or during
storage.
b. Ball and roller bearing (anti
−
friction) motor shafts are to be rotated manually every 3 months and
greased every 6 months in accordance with the Maintenance section of this manual.
c. Sleeve bearing (oil lube) motors are drained of oil prior to shipment. The oil reservoirs must be
refilled to the indicated level with the specified lubricant, (see Maintenance). The shaft should be
rotated monthly by hand at least 10 to 15 revolutions to distribute oil to bearing surfaces.
d. “Provisions for oil mist lubrication” – These motors are packed with grease.
Storage procedures are the same as paragraph 5b.
e. “Oil Mist Lubricated” – These bearings are protected for temporary storage by a corrosion
inhibitor. If stored for greater than 3 months or outdoor storage is anticipated, connected to the oil
mist system while in storage. If this is not possible, add the amount of grease indicated under
“Standard Condition” in Section 3, then rotate the shaft 15 times by hand.
6. All breather drains are to be fully operable while in storage (drain plugs removed). The motors must
be stored so that the drain is at the lowest point. All breathers and automatic “T” drains must be
operable to allow breathing and draining at points other than through the bearings around the shaft.
Vertical motors should be stored in a safe stable vertical position.
7. Coat all external machined surfaces with a rust preventing material.
An acceptable product for this purpose is Exxon Rust Ban # 392.
8. Carbon brushes should be lifted and held in place in the holders, above the commutator, by the brush
holder fingers. The commutator should be wrapped with a suitable material such as cardboard paper
as a mechanical protection against damage.
Non
−
Regreaseable Motors
Non
−
regreasable motors with “Do Not Lubricate” on the nameplate should have the motor shaft rotated
15 times to redistribute the grease within the bearing every 3 months or more often.
All Other Motor Types
Before storage, the following procedure must be performed.
1. Remove the grease drain plug, if supplied, (opposite the grease fitting) on the bottom of each bracket
prior to lubricating the motor.
2. The motor with regreasable bearing must be greased as instructed in Section 3 of this manual.
3. Replace the grease drain plug after greasing.
4. The motor shaft must be rotated a minimum of 15 times after greasing.
5. Motor Shafts are to be rotated at least 15 revolutions manually every 3 months and additional grease
added every nine months (see Section 3) to each bearing.
6. Bearings are to be greased at the time of removal from storage.
Removal From Storage
1. Remove all packing material.
2. Measure and record the electrical resistance of the winding insulation resistance meter at the time of
removal from storage. The insulation resistance must not be less than 50% from the initial reading
recorded when the motor was placed into storage. A decrease in resistance indicates moisture in the
windings and necessitates electrical or mechanical drying before the motor can be placed into
service. If resistance is low, contact your Baldor District office.
3. Regrease the bearings as instructed in Section 3 of this manual.
4. Reinstall the original shipping brace if motor is to be moved. This will hold the shaft firmly against the
bearing and prevent damage during movement.
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