Evaporator Fan And Motor Assembly - Carrier PrimeLINE 69NT40-561-200 Operation And Service Manual

i. Reconnect all wiring using new splices and heat shrink where needed. The heat shrink MUST have a
'melt-able' liner to ensure that the connections are properly sealed when shrunk. This can be seen as a
'Ring' of melt liner pushed from under the heat shrink at each end of the shrink tube.
Failure to use melt liner heat shrink allows moisture to 'wick' up under the heat shrink and cause a
leakage path.

7.17 EVAPORATOR FAN AND MOTOR ASSEMBLY

The evaporator fans circulate air throughout the container by pulling air in the top of the unit. The air is forced
through the evaporator coil where it is either heated or cooled and then discharged out the bottom of the refrigera-
tion unit into the container. The fan motor bearings are factory lubricated and do not require additional grease.
7.17.1 Replacing the Evaporator Fan Assembly
Always turn OFF the unit circuit breakers (CB-1 & CB-2) and disconnect main power supply
before working on moving parts.
1. Remove the access panel by removing the mounting bolts and TIR locking device. Reach inside of the unit
and remove the Ty-Rap securing the wire harness loop. Disconnect the connector by twisting to unlock and
pulling to separate.
2. Loosen four 1/4-20 clamp bolts that are located on the underside of the fan deck at the sides of the fan
assembly. Slide the loosened clamps back from the fan assembly.
3. Slide the fan assembly out from the unit and place on a sturdy work surface.
7.17.2 Disassemble the Evaporator Fan Assembly
1. Attach a spanner wrench to the two 1/4-20 holes located in the fan hub. Loosen the 5/8-18 shaft nut by hold-
ing the spanner wrench stationary and turning the 5/8-18 nut counter-clockwise (see
2. Remove the spanner wrench. Use a universal wheel puller and remove the fan from the shaft. Remove the
washers and key.
3. Remove the four 1/4-20 x 3/4 long bolts that are located under the fan that support the motor and stator
housing. Remove the motor and plastic spacer.
7.17.3 Assemble the Evaporator Fan Assembly
1. Assemble the motor and plastic spacer onto the stator.
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 damaged. 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.
NOTE
WARNING
!
NOTE
7–19
Figure 7.11).
T-362