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
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Revision 10
June 1, 2017
SUBTASK 21-00-23-40-002
9.3
Evaporator Module Assembly Procedures
(refer to Figure 10002/10003):
9.3.1
Assembly of Expansion Valve (FIG. 10002, 10), (FIG. 10003, 60A)
9.3.1.1
Set new valve adjustment screw to same position as failed valve.
9.3.1.2
Using a wire brush and cleaning solvent, completely remove old thread sealant. Apply
a thin layer of thread sealant primer to fitting threads.
CAUTION
: APPLY THREAD SEALANT SPARINGLY TO MALE FITTING THREADS STAYING CLEAR OF
FIRST 2-3 THREADS.
9.3.1.3
Apply 1-2 drops of thread sealant to threads of expansion valve and to evaporator
header nut threads.
CAUTION
: TAKE EXTREME CARE NOT TO GET REFRIGERANT OIL ON FITTING THREADS.
9.3.1.4
Apply thin film of refrigerant oil to expansion valve flare surface and a very small
amount to the O-rings to prevent damage.
9.3.1.5
Connect expansion valve to coil header fitting. Refer to table 1, Section 1 for torque
specifications.
9.3.1.6
Leak check per Testing and Fault Isolation, Section 3.5 and then evacuate and charge
system per Servicing, Section 13.
9.3.2
Assembly of Air Filter (FIG. 10002. 20), (FIG. 10003, 70D)
9.3.2.1
Remove old Velcro from evaporator coil.
9.3.2.2
Apply new Velcro (hook side) along top and bottom of evaporator coil inlet.
9.3.2.3
Apply new Velcro (loop side) along top and bottom of filter.
9.3.2.4
Install new filter into position ensuring Velcro is securely mated.
9.3.3
Assembly of Blower Motor/Wheel (FIG. 10003, 10/20B)
9.3.3.1
Position Blower Wheel on motor shaft. Ensure that there is a 0.25 inch gap between
motor and back of blower wheel.
9.3.3.2
Tighten set screw, ensuring that set screw is located on flat of motor shaft (refer to
table 1, Section 1.3 for torque specifications).
9.3.3.3
Apply RTV to motor and scroll mating surfaces.
CAUTION:
USE EXTREME CARE TO PREVENT DAMAGE OR BENDING OF BLOWER WHEEL DURING
INSTALLATION OF MOTOR AND WHEEL.
