MC3 ChipMaster, Operation & Maintenance Manual, Page: 50 / 63

BIM 1004/2005/05 Page 9 of 20 www.nord.com
LUBRICATION
1. General
NORD motor frame sizes 63 up to and including 225 are prelubricated, therefor require no lubrication during normal
operation.
Frame sizes 250 and larger will have grease fittings for regreasing the motor bearings. Relubricate bearings every six
months (more often if conditions require) using a polyurea base grease, No. 2 consistency & stabilized against
oxidation.
REMOVAL, INSTALLATION, AND HANDLING
1. General
Removing, installing, and handling any NORD electric motor follow the same general procedures. Follow the
general procedures provided below. Observe all WARNINGs and CAUTIONs.
If you have any questions about the procedure to use to handle, install, or remove a specific motor, call NORD Gear
Corporation. Please read the following WARNINGS & CAUTIONS prior to any work on the motor.
WARNING: IF THE MOTOR HAS AN INTEGRAL BRAKE, VERIFY THAT THERE IS NO
LOAD ON THE GEARBOX BEFORE RELEASING THE BRAKE. THIS WILL
PREVENT POSSIBLE INJURY AND POTENTIAL EQUIPMENT DAMAGE
FROM A DROPPED LOAD.
WARNING: THE MOTOR ELECTRICAL POWER HAS DANGEROUS CURRENT LEVELS.
TO PREVENT SERIOUS INJURY, SHUT DOWN THE POWER TO THE
MOTOR AT ITS CIRCUIT BREAKER OR POWER SWITCH BEFORE
REMOVING OR INSTALLING ANY MOTOR. LOCK OUT THE BREAKER OR
SWITCH AND POST IT WITH AN “OUT OF SERVICE” PLACARD.
WARNING: LARGE MOTORS ARE HEAVY, EASY TO UNBALANCE, AND ARE
AWKWARD TO LIFT AND MOVE. EVEN SMALLER MOTORS ARE HEAVY.
HAVE ASSISTANCE WHEN LIFTING AND MOVING HEAVY MOTORS. IF
NECESSARY, USE APPROPRIATE LIFTING DEVICES TO LIFT AND MOVE
HEAVY MOTORS.
CAUTION: TO PREVENT DAMAGE TO THE MOTORSHAFT, BEARINGS, AND THE MATING
HUB/SHEAVE IN THE GEARBOX, MAINTAIN SHAFT ALIGNMENT WHILE
REMOVING THE MOTOR FROM ITS GEARBOX.
2. Removal
A. Drain the oil from the mating gearbox, or rotate the motor/gearbox assembly so that the motor is up, to prevent
oil from spilling from the gearbox when the motor is removed.
B. Shut down the power to the motor at the main circuit breaker or power switch. Lock out the breaker or switch
and place an “OUT OF SERVICE” placard on the breaker or switch.
C. Disconnect the wiring to the motor. Tag each wire as it is disconnected.
D. Prepare the motor for removal by supporting the motor appropriately. For smaller motors, use assistance to
steady the motor or support it. For larger motors, use mechanical lifting or support devices to steady and
support the motor.
E. Remove the bolts and washers securing the motor to the its mounting.
F. Maintain motor shaft alignment, and move the motor away from its mounting pad until the motor shaft clears
its mating hub/sheave or gearmesh. If the motor shaft is a keyed shaft, keep the drive key with the motor.
G. Remove and discard the flange gasket. Clean the gasket material from the flange.