7–17
T-340
7.15.3
Assemble the Evaporator Fan Assembly
1. Assemble the motor and plastic spacer onto the stator.
NOTE
When removing the black nylon evaporator fan blade, care must be taken to assure that the blade is not
damaged. In the past, it was a common practice to insert a screwdriver between the fan blades to keep it
from turning. This practice can no longer be used, as the blade is made up of a material that will be dam
-
aged. It is recommended that an impact wrench be used when removing the blade. Do not use the impact
wrench when reinstalling, as galling of the stainless steel shaft can occur.
2. Apply Loctite to the 1/4-20 x 3/4 long bolts and torque to 0.81 mkg (70 inch-pounds).
3. Place one 5/8 flat washer on the shoulder of the fan motor shaft. Insert the key in the keyway and lubricate
the fan motor shaft and threads with a graphite-oil solution (such as Never-seez).
4. Install the fan onto the motor shaft. Place one 5/8 flat washer with a 5/8-18 locknut onto the motor shaft and
torque to 40 foot-pounds.
Figure 7.10 Evaporator Fan Assembly
1) Stator
2) Flat washer, 5/8
3) Locknut, 5/8-18
4) Impeller Fan
5) Screw, 1/4
6) Flat washer, 1/4
7) Mylar Protector
8) Evaporator Motor
- - - - -
5. Install the evaporator fan assembly in reverse order of removal. Torque the four 1/4-20 clamp bolts to 0.81
mkg (70 inch-pounds). Connect the wiring connector.
6. Replace access panel, making sure that the panel does not leak. Make sure that the TIR locking device is
lockwired.
7.16 Evaporator Section Cleaning
Containers and Container units that are exposed to certain fumigants may develop visible surface corrosion. This
corrosion will show up as a white powder found on the inside of the container and on the reefer unit evaporator sta
-
tor and fan deck.
Analyses by Carrier Transicold environmental specialists have identified the white powder as consisting predominantly
of aluminum oxide. Aluminum oxide is a coarse crystalline deposit most likely the result of surface corrosion on the
