Johnson Controls ENVIRO-TEC MQL B Series, Manual

greasing intervals. Keep the motor clean and the ven-

tilation opening clear. The following steps should be 

performed at each inspection:

1.  Check that the motor is clean. Check that the in-

terior and exterior of the motor is free of dirt, oil, 

grease, water, etc. This can accumulate and block 

motor ventilation. If the motor is not properly 

ventilated over heating can occur and can cause 

early motor failure.

2.  Use “Megger” periodically to ensure that the in-

tegrity of the winding insulation has been main-

tained. Record the “Megger” readings. Immedi-

ately investigate any significant drop in insulation 

resistance.

3.  Check all electrical connectors to be sure that they 

are tight.

4.  Check that all mechanical fasteners are properly 

tightened.

Lubrication and Bearings

Bearing grease will lose its lubrication 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 recom-

mendations are used in your maintenance program.
The recommended lubrication interval for 1800-RPM 

motor, up to and including NEMA frame 215T is every 

12000 hours of operation. It is important to remember 

that this recommendation is base of average use. Refer 

to 

Table 2 on page 23 

for additional information.

Types of Grease

A high-grade ball or roller bearing grease should be 

used. See 

Table 3 on page 23 

for Recommended 

Greases.
Chevron SRI (Factory Installed) - Polyurea Base

Lubrication Procedure

Be sure that the grease you are adding to the motor is 

compatible with the grease already in the motor. Con-

sult your factory representative if a grease other than 

the recommended type is to be used.

To avoid damage to motor bearings, grease 

must be kept free of dirt.

With Grease Outlet Plug

1. 

Clean grease fitting.

2.  Remove grease outlet plug.
3.  If motor is stopped, add the recommended amount 

of grease. If motor is to be greased while running, 

a slightly greater quantity of grease will have to 

be added. Add grease slowly until new grease ap 

pears at shaft whole in the end plate or purge out-

let plug.

4.  Re-install grease outlet plug.

Without Grease Outlet Plug

1.  Disassembly motor.
2.  Add recommended amount of grease to bearing 

and bearing cavity. (Bearing should be about 1/3 

full of grease and outboard bearing cavity should 

be about ½ full of grease.)

3.  Assemble motor.

To re-lubricate the motor, consult the maintenance tag 

provided on the motor.
Refer to 

Table 1 on page 22 

for minimum torque of 

motor mounting and bearing bolts.

JOHNSON CONTROLS

24

FORM ET102.19-NOM1

ISSUE DATE:08/26/2013

SECTION 4 - PERIODIC MANINTENANCE AND SERVICE