Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
Copyright © 2017
ATA 21-00-23
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Revision 10
June 1, 2017
SUBTASK 21-00-23-20-001
12.4
Motor Bearing Inspection:
12.4.1
Motor bearing will be inspected according to Section 8 Inspection Schedule Table 3.5 to
ensure that premature seizure does not occur.
12.4.2
Gain access to the Compressor Condenser Module (refer to the aircraft maintenance
manual for removal of access panels and other hardware that might need to be removed)
12.4.3
Verify that power is removed from aircraft. If it is not practical to remove aircraft power,
technician must pull and collar applicable circuit breakers.
12.4.4
Remove brush cover (on some systems, removal of power leads is required prior to brush
cover removal, tag positive terminal).
12.4.5
Remove brushes from guides and remove belt from motor pulley (refer to Disassembly,
Section 5).
12.4.6
Rotate motor shaft by hand to ensure freedom of movement. Visually inspect bearing for
sign of overheating or loss of lubrication using an inspection mirror.
CAUTION
: CAREFULLY LAY BRUSH SHUNT LEADS IN A POSITION WHICH WILL PREVENT ANY
POSSIBLE SHORTING PROBLEMS. LEADS MUST EASILY FOLLOW BRUSH AND SPRING MOVEMENT
AS WEAR OCCURS. IMPROPER LEAD PLACEMENT MAY RESULT IN MOTOR DAMAGE.
12.4.7
If bearings rotate smoothly and are good, reinstall belt and brushes (refer to Assembly,
Section 9). Check belt alignment and tensioning (refer to Assembly, Section 9).
SUBTASK 21-00-23-20-002
12.5
Compressor Bearing Inspection:
12.5.1
Compressor bearing will be inspected according to Section 7 Inspection Schedule Table 3.5
to ensure that premature seizure does not occur.
12.5.2
Gain access to the Compressor Condenser Module (refer to the aircraft maintenance
manual for removal of access panels and other hardware that might need to be removed).
12.5.3
Verify that power is removed from aircraft. If it is not practical to remove aircraft power,
technician must pull and collar applicable circuit breakers.
12.5.4
Rotate compressor pulley by hand to ensure freedom of movement and to ensure that the
pulley is not showing signs of loosening. Visually inspect bearing for sign of overheating or
loss of lubrication using an inspection mirror.
12.5.5
If bearings rotate smoothly and are in otherwise good condition, perform belt alignment and
tensioning (refer to Assembly, Section 9).
