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Section VII. IDENTIFICATION AND DATA PLATES
3-14. Identification and Data Plates
(2) Remove damaged plate by drilling out
a. Inspection. Inspect identification or data plate
retaining rivets.
for chipped paint, cracks, breaks, and dents.
c. Installation.
Replace as necessary.
(1) Replace new plate on panel and insert
b. Removal.
rivets.
(1) Refer to figures 1-1 and 3-1 and remove
(2) Replace panel.
panel upon which the identification or data plate is
secured.
Section VIII. AIR FILTER
3-15. Air Filter
a. Removal.
(1) Refer to figure 3-1 and remove evaporator
front panel.
(2) Refer to figure 3-2, slide filter up and out
of retainer clips.
b. Cleaning and Inspection.
(1) Examine filter for dirty or clogged
condition.
(2) Clean filter by flushing with water in
opposite direction of air flow. Allow filter to dry
completely before lubricating.
Note. Be careful not to damage the filter during
cleaning.
c. Lubricating.
(1) Treat filter with oil, lubricating grade 30,
by spraying a light coat of oil on the air inlet side of
the filter. Keep oil can spray nozzle 12 to 14 inches
from filter while spraying.
(2) Allow filter to drain thoroughly before
replacing it.
d. Installation.
( 1 ) Refer to figure 3-2 and replace filter into
(2) side retainer clips. Slide filter downward into
position.
(2) Refer to figure
3-1 and install the
evaporator front panel.
Section IX. ELECTRICAL SYSTEM
3-16. General
The electrical system can be divided into two cir-
cuits. A power circuit and a control circuit. The
power circuit requires 115 volt, 60 hertz, 1 phase
supply. A rectifier transforms the AC current into
115 volt DC current for the control circuit. Refer to
the wiring schematic, FO-2 (located in back of
manual ) for component nomenclature and as a
guide for troubleshooting. The wiring diagram,
FO-1 (located in back of manual) should be used to
check the exact connections of wiring.
Warning: Always disconnect power supply
b e f o r e p e r f o r m i n g m a i n t e n a n c e o n t h e
electrical system.
3-17. E vaporator Fan Motor
a. Testing and Inspection.
( 1 ) Refer to figure 3-1 and remove evaporator
top panel.
(2) Remove red, yellow and brown motor
leads.
(3) Using a multimeter, check for continuity
between motor leads. If check fails, this indicates
an open winding or protector. Replace the motor,
refer to b. and c. below.
3-14
(4) Check for continuity between the red lead
and the motor frame. If ’there is continuity, one of
the windings is shorted to the ground. Replace the
motor, refer to b. and c. below.
(5) If the motor cycles on and off without
being switched check the amperage flowing in the
leads. If any reading greatly exceeds 2.47 amps and
the motor and blade are free from external factors
that could cause binding, replace the motor. Either
a partial short circuit
through the windings or
internal physical binding are indicated.
b. Removal.
(1) Refer to figure 3-1 and remove evaporator
top. top left, and right side panels.
(2) Tag and disconnect the motor leads.
(3) Refer to figure 3-2 and remove motor from
fan motor mounting bracket.
(4) Loosen setscrews (2) and remove the fan
blade from the motor shaft.
c. Installation.
(1) Slip evaporator fan blade on shaft of motor
and tighten setscrews.
(2) Refer to figure 3-2 and install motor into
mounting bracket.
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