Milnor MWT12E5, Installation And Service

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Motor Maintenance
PELLERIN MILNOR CORPORATION
BIUUUM03 (Published) Book specs- Dates: 20111018 / 20111018 / 20120629 Lang: ENG01 Applic: UUU
Motor Maintenance
This document uses Simplified Technical English.
Learn more at http://www.asd-ste100.org.
This document is for motors used on Milnor
®
machines that have grease fittings. If the motor
manufacturer supplies maintenance instructions, use them. If not, use this document.
NOTICE P1: "Remove power from the machine" means use the necessary safety procedure for
your location. In the USA, this is the OSHA lockout/tagout (LOTO) procedure. More local
requirements can also apply.
WARNING 2 : Risk of Severe Injury
—A machine in operation without safety guards can
pull in and mutilate your body.
• You must be an approved maintenance technician.
• Replace guards and covers that you remove for maintenance.
WARNING 3 : Risk of Severe Injury
—The machine has electrical power when the Master
switch (
M
) on the control panel is off or on.
• Remove power from the machine (see Notice P1).
1.
Necessary Maintenance
1.1.
Keep the motors clean.
—Examine and clean motors each 500 hours of operation or a
minimum of each three months. Keep the motors free of dirt, oil, grease, and water.
Contamination that prevents good airflow will cause too much heat and cause motor damage.
1.2.
Examine a motor that shows unusual symptoms.
—Examine a motor that becomes
too hot, makes noise, makes smoke, smells unusual, or opens the circuit breaker frequently.
Examine a motor if the inverter gives errors. Make sure that all electrical connections are tight.
Make sure that the wire insulation is good. Use a low resistance ohmmeter. Disassemble the
motor to clean it fully If necessary.
1.3.
Lubricate the motors.
—This document gives the lubricant frequency, quantity, type, and
procedure. These are all important. See the related section in document BIIFUM02 which gives
the calibration procedures for grease guns.
2.
How to Find the Interval and Quantity of Grease to Add
frame code—codes for the standard motor dimensions used by motor manufacturers.
standard interval—the number of hours that a motor can operate in typical conditions before
you must add grease.
operation conditions—the conditions that can decrease the life of the motor and make it
necessary to lubricate more frequently.
rating—One of three levels of operation conditions: typical, bad, very bad.
multiplication number—a decimal number given to the rating. Typical = 1.0, bad = 0.5, and
very bad = 0.2.
This section gives the steps you use to find the interval and quantity of grease to add. The
examples use the motor data plate shown in
Figure 1 .
41