757 MAINTENANCE MANUAL
 (3)  
Vacuum - commercially available

 B.
Parts

 ~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT |FIG | ITEM | ................................................................................ | 401 | 1 | Fan | 21-44-05 | 01 | 135 | | | 2 | Clamp | | | 105 | | | 3 | Hose | | | 120 | | | 4 | Clamp | | | 110 | | | 5 | Nut (Self Locking) | | | 45 | | | 6 | Bolt | | | 55 | | | 7 | Washer | | | 90 | | | 8 | Nut (Self Locking) | | | 95 | | | 11 | Washer | | | 90 | | | 12 | Nut (Self Locking) | | | 95 | 2......…........…...................................…...........….....…........1
 C. References
 (1)  
AMM 06-46-00/201, Entry, Service, and Cargo Doors, Access Doors and Panels

 (2)  
AMM 24-22-00/201, Electric Power Control

 (3)  
AMM 25-50-03/401, Bulkhead Lining Panels

 D.
Access

 (1)  
Location Zones
 153/154 Aft Cargo Compartment

 E.
Procedure

 (1)  
Align the fan (1) with the cargo heating duct.

 S 434-015

 (2)  
Install the bolts (6), washers (7), and nuts (8) in the top fan support lugs.

 S 424-014
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 S 434-016
 (3)  
Install the nut (12) and washer (11) on the eyebolt at the lower fan support lug.

 S 434-017

 (4)  
Put the hoses (3) in two locations on the fan-duct connection.

 S 434-018

 (5)  
Install the clamps (2 and 4) in four locations. Tighten.

 S 434-019

 (6)  
Install the nut (5) that connects the bonding jumper (9) to the fan (1).

 S 434-020

 (7)  
Connect the electrical connector to the fan.

 S 414-021

 (8)  
Install the bulkhead lining (AMM 25-50-03/401).

 S 864-022

 (9)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the overhead circuit breaker panel, P11:

 (a)  
11N22, CARGO HEAT FAN AFT

 S 864-023
 (10)
 Remove the DO-NOT-CLOSE tag and close this circuit breaker on the right miscellaneous electrical equipment panel, P37:

 (a)  
37C2, AFT CARGO FAN

 S 144-025
 (11)
 Clean the aft cargo heating intake grill as follows:

 (a)  
Remove the intake grill.

 (b)  
Vacuum the front and back side of the grill to remove all of the dirt and debris.

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 (c)
Install the intake grill. S 704-026

 (12)
 Do a test of the aft cargo heating flow fan.

 (a)  Supply electrical power (AMM 24-22-00/201).
 NOTE:____ The aft cargo heating flow fan operates automatically.
 A signal from a temperature switch puts the fan on or
 off.
 (b)  Listen to make sure the fan operates.
 1)  If the ambient temperature in the cargo compartment is more
 than 50°F, apply the cooling source to the temperature
 thermal switch for the cargo compartment.  Decrease the
 switch temperature until the fan operates.

 S 414-027
 (13)
 Close the No. 2 Cargo Door (822) (AMM 06-46-00/201).

 S 864-028

 (14)
 Remove electrical power, if it is not necessary.

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