6:2
DANGER
INTERNAL PARTS OF THIS
MOTOR MAY BE AT LINE
VOLTAGE EVEN WHEN THE
MOTOR IS NOT ROTATING.
BEFORE CONTACTING ANY
INTERNAL PART, DISCON-
NECT ALL A-C LINE INPUT
CONNECTIONS. FAILURE
TO OBSERVE THIS PRE-
CAUTION COULD RESULT IN
SEVERE BODILY INJURY OR
LOSS OF LIFE.
1.
Make sure the disassembly
location is free of metallic
particles.
The motor contains
permanent magnets. Metallic
particles will accumulate in the
air gap between the rotor and
stator preventing successful
operation of the motor.
WARNING
THE MOTOR CONTAINS
VERY STRONG PERMA-
NENT MAGNETS. EXERCISE
CARE WHEN REMOVING
THE ROTATING ASSEMBLY.
FAILURE TO OBSERVE THIS
PRECAUTION COULD RE-
SULT IN BODILY INJURY.
2.
Exercise care to not damage
the stator windings during
disassembly. Insulation can be
damaged by improper or
rough handling.
3.
Exercise care to keep
bearings clean.
4.
Disconnect the motor from the
controller. Tag the leads to
insure proper reconnection.
5.
Remove the motor from its
mounting base.
Remove End Shields
6.
Remove the blower motor
housing and the outer encoder
housing then loosen the set
screws on the stub shaft.
7.
Remove the inner encoder
housing and the encoder from
the motor bracket.
8.
Mark each end shield relative
to its position on the frame so
it can be easily replaced.
9.
Remove any bearing clamp
screws.
10. Remove the end shield
through-bolts.
11. Pull the end shields.
Remove and Replace Ball
Bearings
12. Thoroughly clean and repack
the bearing bore and cavity
with approximately 1/2
teaspoon (1.5 ml) of
recommended grease
(Chevron SRI #2 or
equivalent).
13. Remove the drive end bearing
with bearing pullers using a
center insert in the end of the
shaft to protect the shaft
center. Remove the front end
bearing by slipping a sleeve
over the stub shaft (There is
no center drill.) and pressing
the bearing off the shaft.
Reassemble the Motor
1.
Re-install bearings by
preheating and pressing the
bearings on the shaft with a
bench press applying
pressure to the inner race.
Use a square-faced sleeve or
piece of pipe that fits over the
shaft to avoid damaging the
bearing.
2.
Re-align the encoder in its
housing. The Encoder Tester
Kit (M/N 3RE5) is required.
Follow the alignment
procedures in the kit D5-3023
Instruction Manual.
CAUTION
Encoder signals PU, PV, and
PW on regulator board (Figure
7-10) must be aligned accord-
ing to the Encoder Test Kit
D5-3023 Instruction Manual for
successful drive operation.
Failure to observe this precau-
tion could result in damage to,
or destruction of, the equip-
ment.
3.
Reverse the procedure given
in “Disassemble the Motor”.
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