You can replace the HEX units during operation.

The following tools are required for installation:

•T-25 Torx driver

•Adjustable wrench or pipe wrench

Removing the heat exchanger unit with ball valves

NOTE: For this procedure, remove the fan unit seated directly behind the heat exchanger unit you will remove.

1.Remove the fan unit ("Removing the fan unit" on page 51).

2.Remove the air deflector plate ("Removing the air deflector plate" on page 33).

NOTE: The heat exchanger units are deep-seated within the MCS unit. To access the connections described in the following steps, extend your arm inside the MCS unit until you come in contact with the appropriate connectors.

3.Disconnect the temperature sensor connector from the HEX unit.

Removal and replacement procedures 68