Maintenance & Troubleshooting 3-3
MN409
G40, G50 G315, G5000, G5810 Frames
Recommended Lubricant
Refer to the motor Lubrication nameplate for the type of lubricant to be used. If there is no Lubrication
nameplate on the motor, use the following lubricants:
G5000 & G315 Frames
−
Polyurea base hydrocarbon oil grease
G5810 & G40 Frames
−
Polyurea base hydrocarbon oil grease
G50 Frame
−
Lithium base hydrocarbon oil grease
Note: Lubrication nameplate on the motor takes precedent over this data. Use only clean, fresh grease
from clean containers.
Grease Lubrication Instructions
Anti
−
friction bearings may be lubricated with the motor running or stationary. However, stationary with the
motor warm is the preferred method.
WARNING:
Rotating parts can cause serious or fatal injury. If relubrication is performed with the motor
running, to avoid injury do not contact any rotating parts.
1.
Locate the grease inlet, remove all caked grease and dirt from the fitting.
2.
Remove relief plug. If grease is caked around the plug, clean with a wooden stick or suitable
tool. If severe caking appears at the plug, run the motor until the bearing housing is warm,
permitting free flow of grease through the housing.
3.
Add the recommended volume of the recommended lubricant per the motor Lubrication
Nameplate or Table 3-3 using a hand operated grease gun.
4.
Start the motor and run with the relief plug open for several minutes until all excess grease is
relieved.
5.
Replace plugs and wipe off any excess grease.
Table 3-3 Relubrication Volume
(cubic inches; Motor Maximum speed
−
RPM)
Frame Size
3000 & 3600
Less Than 3000
G5000 & G315
1.5
3.0
G5810 & G40
1.5
3.0
G50
4.0
Data contained on a lubrication nameplate on the motor takes precedent over this Table.
Sleeve Bearings (Oil Lubricated) Instructions
Oil should be changed periodically, or immediately if discolored or contaminated. Follow the schedule on
the motor nameplate, or if not known use the Table 3-4 schedule.
Table 3-4 Lubrication Schedule
Speed
−
RPM
Service Conditions
Change Oil (Hours)
All Speeds
Standard
8800
All Speeds
Severe
4400
Standard Conditions
: Normal or light loading, Clean, 0
°
F (
−
18
°
C)
to
104
°
F (40
°
C) ambient.
Severe Conditions
: Medium shock/vibration, Dirt/Dust,
−
20
°
F (
−
30
°
C)
to
120
°
F
(50
°
C) ambient.
Lubricant for sleeve bearing motors should be selected from Table 3-5.
Table 3-5
Ambient Temperature
Speed
−
RPM
1200 or less
Greater than 1200
0 to120
°
F (
−
18 to 50
°
C)
300 SUS (68 cST)
150 SUS (32 cST)
−
20 to 50
°
F (
−
30 to 10
°
C)
150 SUS (32 cST)
90 SUS (18 cST)
This Manual:http://www.manuallib.com/baldor/mn409-large-ac-motors-handbook.html
