Component Maintenance Manual
EFFECTIVITY: ALL
21-00-22
Page
6002
JULY 21, 2011
8.2.1.1
DRIVE BELT/COVER/PULLEYS: The drive belt and the associated pulleys will, over
time, become worn or damaged, or may simply be out of alignment. It is essential that
the drive belt and the pulleys are in excellent condition for proper operation of the
Compressor Condenser Module assembly. If the drive belt edges are showing signs
of wearing or if cracking is noticed, it should be replaced. If the motor drive pulley is
showing signs of wearing, both on the pulley teeth and pulley flanges, it should be
replaced. If belt cover is cracked or damaged in any way, it should be replaced. If
assembly is out of alignment, system will need to be aligned and tensioned. Refer to
Disassembly (Section 5) and Assembly (Section 9). Contact Enviro Systems
customer service to order new components.
8.2.1.2
DRIVE MOTOR BRUSHES: Drive motor brushes can, over time, become worn or
damaged. It is essential that the drive motor brushes remain in excellent condition for
proper operation of the compressor condenser module assembly. They must be
replaced according to the inspection schedule in Section 7. Refer to Disassembly
(Section 5) and Assembly (Section 9).
CAUTION:
INSPECT THE COMMUTATOR FOR EXCESSIVE OR UNEVEN WEAR. THE COMMUTATOR
SHOULD HAVE A BURNISHED APPEARANCE WITH LIGHT FILMING. IF THE COMMUTATOR IS BLACK,
BURNED, PITTED, GROOVED, OR EXCESSIVELY WORN, THE MOTOR SHOULD BE REPLACED OR
REBUILT. IF THE DEPTH OF THE MICA UNDERCUT REMAINING ON THE COMMUTATOR IS LESS
THAN .020 INCH THE MOTOR SHOULD ALSO BE REPLACED. (See Illustration 4.3 THRU 4.5 in Section 7
for examples)
8.2.1.3
COMPRESSOR ASSEMBLY: The compressor and pulley can, over time, become
dirty and shows signs of wear and/or damage. It is essential that the compressor and
its pulley remain in excellent condition for proper operation of the Compressor
Condenser Module assembly. Check the pulley condition as per 8.2.1.1. If there is
damage to the pulley, it should be replaced. Check the compressor shaft seal as per
8.2.1.4. If a leak is detected and it is excessive, the compressor should be replaced.
If there is visible damage to the compressor housing, the compressor should be
removed and replaced. Refer to Disassembly (Section 5) and Assembly (Section 9).
Contact Enviro Systems customer service.
8.2.1.4
COMPRESSOR SHAFT SEAL: Over time, the compressor shaft seal may show signs
of excessive oil spray and this can cause the Compressor Condenser Module
assembly to have less than optimal performance. If excessive oil spray is observed,
the compressor should be replaced. Refer to Disassembly (Section 5) and Assembly
(Section 9). Contact Enviro Systems customer service to order new compressor.
NOTE
: If the compressor has not been operated for 30-60 days or more, the dynamic shaft seal may indicate
a small leak due to the absence of oil on the dynamic seal surface. Operation of the system should eliminate
this type of leak. If not, proceed with removal and replacement procedures.