6--15
T-334
1
9
8
7
6
5
4
3
2
1. Top Screw
2. Washer
3. Coil
4. Locknut
5. Enclosing Tube
6. Gasket
7. Stem and Plunger
8. Seat Disc
9. Body
Figure 6--16 Unloader Solenoid Valve
1. Be sure electrical power is removed from the unit.
Disconnect leads. Remove top screw and washer.
Lift off coil. (See Figure 6--15 or Figure 6--16).
2. Verify coil type, voltage and frequency of old and new
coil. This information appears on the coil housing.
b.
Replacing Valve
1. To replace the unloader, economizer, liquid injection
or expansion bypass valve, pump down the unit. Re-
fer to paragraph 6.3.2. Evacuate if unit is not
equipped with service valves. Refer to paragraph
6.4.4.To replace the oil return valve, remove the re-
frigerant charge.
2. Be sure electrical power is removed from the unit.
Disconnect leads. Remove top screw and washer.
Lift off coil. (See Figure 6--15 or Figure 6--16).
3. Unbraze valve from unit and braze new valve in
place.
4. Install coil. Evacuate low side and place unit back in
operation. Check charge.
6.15 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 refrigeration unit into the container. The fan motor
bearings are factory lubricated and do not require
additional grease.
6.15.1 Replacing The Evaporator Fan Assembly
WARNING
Always turn OFF the unit circuit breakers
(CB-1 & CB-2) and disconnect main power
supply before working on moving parts.
a. Remove upper access panel (see Figure 2--2) by
removing mounting bolts and TIR locking device.
Reach inside of unit and remove the Ty-Rap securing
the wire harness loop. Then disconnect the connector
by twisting to unlock and pulling to separate.
b. Loosen four 1/4-20 clamp bolts that are located on the
underside of the fan deck at the sides of the of the fan
assembly. Slide the loosened clamps back from the
fan assembly.
c. Slide the fan assembly out from the unit and place on
a sturdy work surface.
6.15.2 Disassemble The Evaporator Fan Assembly
a. Attach a spanner wrench to the two 1/4-20 holes
located in the fan hub. Loosen the 5/8-18 shaft nut by
holding the spanner wrench stationary and turning
the 5/8-18 nut counter-clockwise (see Figure 6--17).
b. Remove the spanner wrench. Use a universal wheel
puller and remove the fan from the shaft. Remove the
washers and key.
c. Remove the four 1/4-20 x 3/4 long bolts that are
located under the fan that support the motor and sta-
tor housing. Remove the motor and plastic spacer.
1
6
5
3
2
4
2
7
8
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
Figure 6--17 Evaporator Fan Assembly
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