Hoshizaki 73168 ユーザーズマニュアル

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Be careful when handling the evaporator shroud assembly. This assembly 
includes a defrost heater sheathed in a glass tube. This sheathing can be 
easily damaged and may also cause cuts if broken. Heater will also be hot after 
a defrost. Use gloves when handling and avoid touching the glass directly. Also 
prevent heaters from touching other parts.

1) Remove the refrigeration system cartridge. Perform steps 1 through 16 in "IV.B.2.

Pump‑Down Procedure." Once the refrigeration system cartridge is out, return to
step 2.

2) Disconnect the wires to the fan motor, then remove the defrost thermistor, cabinet 

thermistor, defrost thermostat, and defrost heater from the evaporator shroud.

3) Remove the evaporator shroud from the evaporator.
4) Remove the fan motor. See Fig. 9.
5) Install the new fan motor.

Note: Confirm that the fan motor wires are sealed with food grade silicone at the motor 

housing.

6) Replace the evaporator shroud in its proper position.
7) Replace the removed parts in their correct positions, and connect the fan motor wires.
8) Once the repair is complete, return to step 17 in "IV.B.2. Pump‑Down Procedure" for

refrigeration system cartridge replacement.

Cabinet Fan Motors

Cabinet Thermistor

Defrost Thermistor

Defrost Thermostat

Defrost Heater

Evaporator Shroud 

Cabinet Fan 
Motors