Air Duct: Service and Repair

Heater and A/C Air Inlet Duct Door










Item Part Number Description

1 18471 Heater Air Plenum Chamber
2 18B283 Heater Air Vent Door Spring
3 - Heater and A/C Air Inlet Duct Door Crank Arm
4 45270-S36 Nut ( 2 Reg'd)
5 19C590 A/C Recirculating Air Duct
6 44711-S2 Washer
7 372927-S2 Pushnut
8 18A318 Vacuum Control Motor




Removal

1. Remove the spring nut retaining the heater and A/C air inlet duct door vacuum control motor arm to the heater and A/C air inlet duct door crank arm.

2. Disengage the vacuum control motor arm and washer from the crank arm.

3. Disengage the assist spring and the second washer from the crank arm.

4. Disconnect the white vacuum hose connector from the vacuum control motor.

5. Remove two nuts retaining the vacuum control motor and the assist spring bracket to the air inlet duct mounting bracket. Remove the vacuum control motor and the assist spring mounting bracket.


Installation

1. Position the vacuum control motor and the assist spring bracket to the air inlet duct mounting bracket. Install the retaining nuts.

2. Install one of the washers on the crank arm. Install the loop end of the assist spring.

3. Install the second washer and the vacuum control motor arm on the crank arm. Secure the two washers, the assist spring and the vacuum control motor arm on the crank arm with a new spring nut.

4. Connect the white vacuum hose connector onto the vacuum control motor.

5. Check for proper system operation.