12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
www.enviro-ok.com
www.safran‐
passenger
‐solutions.com
Copyright © 2020
Original Release
ATA 21‐00‐60
Page | 36
9.3. Evaporator Module Assembly Procedures
9.3.1. Assembly of Expansion Valve
9.3.1.1.
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.
9.3.1.2.
Apply 1-2 drops of thread sealant to threads of evaporator header nut threads.
CAUTION
: TAKE EXTREME CARE NOT TO GET REFRIGERANT OIL ON FITTING THREADS.
9.3.1.3.
Apply thin film of refrigerant oil to the O-rings to prevent damage.
9.3.1.4.
Connect expansion valve to coil header fitting. Refer to table 1, Section 1 for torque
specifications.
9.3.1.5.
Leak check per Testing and Fault Isolation, Section 3 and then evacuate and charge
system per Servicing Section.
9.3.2. Assembly of Blower Motor/Wheel
9.3.2.1.
Position Blower Wheel on motor shaft. Ensure that there is a 0.25 inch gap between
motor and back of blower wheel.
9.3.2.2.
Apply Loctite 242 threadlocker to set screw and tighten, ensuring that set screw is
located on flat of motor shaft (refer to table 1, Section 1 for torque specifications).
9.3.2.3.
Apply a thin bead of 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.
9.3.2.4.
Slide motor/blower wheel into scroll and attach with 6 screws and 10 washers.
