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
P a g e
|
38
Revision 10
June 1, 2017
7.1.3
Brush Inspection (1134400-59 Only)
7.1.3.1
Determine how many hours the installed brushes have accumulated since new. If the
compressor condenser module was installed new and the motor and/or brushes have
never been replaced, then the hours shown on the compressor/condenser hour meter
may be used.
7.1.3.2
If hours on installed brushes are unknown, the brush depth measurement from 7.1.3.3
cannot exceed 0.10 inches.
7.1.3.3
To calculate remaining brush life, use following method. Calculations should be based
on the shortest brush length.
Step 1:
Measure depth in inches from the top of the brush guide to the top of the brush and
use in the following equation to calculate the Wear Rate.
Hours
0.03)
+
Depth
(Measured
=
Rate
Wear
Step 2:
Calculate the remaining Usable Length of brush using the following equation.
0.03)
+
Depth
(Measured
-
0.5
=
Length
Usable
Step 3:
Calculate the Remaining Brush Life in hours using the following equation.
700
Rate
Wear
Length
Usable
=
Life
Brush
Remaining
≥
7.1.3.4
If Remaining Brush Life is less than 700 hours, brushes or motor must be replaced.
