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Product Information Packet: ECP844256T-4 - 250HP,1200RPM,3PH,60HZ,449T,TEFC,FOOT,
Section 3
Maintenance & T
roubleshooting
Maintenance & T
roubleshooting 3
−
1
MN408
W
ARNING:
UL and EX Listed motors must only be serviced by UL or EX Approved Authorized Baldor Service
Centers if these motors are to be returned to a hazardous and/or explosive atmosphere.
General Inspection
Inspect the motor at regular intervals, approximately every 500 hours of operation or every 3
months, whichever occurs first. Keep the motor clean and the ventilation openings clear
. The following
steps should be performed at each inspection:
W
ARNING:
Do not touch electrical connections before you first ensure that power has been disconnected.
Electrical shock can cause serious or fatal injury
. Only qualified personnel should attempt the
installation, operation and maintenance of this equipment.
1.
Check that the motor is clean. Check that the interior and exterior of the motor is free of dirt, oil,
grease, water
, etc. Oily vapor
, paper pulp, textile lint, etc. can accumulate and block motor
ventilation. If the motor is not properly ventilated, overheating can occur and cause early motor
failure.
2.
Perform a dielectric with stand test periodically to ensure that the integrity of the winding insulation
has been maintained. Record the readings. Immediately investigate any significant decrease in
insulation resistance.
3.
Check all electrical connectors to be sure that they are tight.
Relubrication & Bearings
Bearing grease will lose its lubricating ability over time, not suddenly
. The lubricating
ability of a grease (over time) depends primarily on the type of grease, the size of the bearing, the speed
at which the bearing operates and the severity of the operating conditions. Good results can be obtained
if the following recommendations are used in your maintenance program.
Type of Grease
A high grade ball or roller bearing grease should be used. Recommended grease for standard
service conditions is
Polyrex EM (Exxon Mobil)
. Do not mix greases unless compatibility has been
checked and verified.
Ball Bearing Motors
Operating
T
emperature
−
25
°
C (
−
15
°
F) to 50
°
C (120
°
F)
EXXON
POL
YREX EM (Standard on Baldor motors)
EXXON
UNIREX N2
EXXON
BEACON 325
CHEVRON
OIL
SRI NO. 2 ( Compatible with Polyrex EM )
CHEVRON OIL
BLACK
PEARL
TEXACO, INC.
PREMIUM
RB
TEXACO, INC.
POL
YST
AR
AMOCO
R
YKON # 2
PENNZOIL
PENNZLUBE EM
−
2
DARMEX
DARMEX 707
DARMEX
DARMEX 71
1
PETRO
−
CANADA
PEERLESS LLG
SHELL OIL
DOLIUM
BRB
Minimum Starting T
emperature
−
60
°
C (
−
76
°
F)
SHELL OIL CO.
AEROSHELL 7 (Standard on Baldor motors)
MOBIL
MOBIL 28
MOBIL
MOBILITH SHC 100 (Low T
emperature
−
Arctic Duty)
Roller Bearing Motors
Operating
T
emperature
−
25
°
C (
−
15
°
F) to 50
°
C (120
°
F)
TEXACO, INC.
PREMIUM
RB
MOBIL
MOBILITH SHC 220 (Standard on Baldor motors)
CHEVRON OIL
BLACK
PEARL
