4. Procedure
_________ Subtask 32-48-00-720-050
 A. Test of the brake fans
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the panel 402VU, push the BRK  - The ON legend comes on. FAN CONTROL pushbutton switch. - The brake cooling fans operate.
 -The air is drawn through the brake units.
 2. On the panel 402VU, release the  - The ON legend goes off. BRK FAN CONTROL pushbutton - The fans of the wheels stop. switch.
 Subtask 32-48-00-860-056
 B. Aircraft Maintenance Configuration
 (1) De-energize the aircraft electrical circuits. (Ref. TASK 24-41-00-862-002)
 5. Close-up
________ Subtask 32-48-00-942-053
 A. Removal of Equipment
 (1)
 Remove the warning notice(s)

 (2)
 Make sure that the work area is clean and clear of tool(s) and other items.

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R  FAN ASSY (7GS,8GS,9GS,10GS,2789GM,2790GM,2791GM,2792GM) - REMOVAL/INSTALLATION______________________________________________________________________________ **ON A/C 301-399, 401-499,
 TASK 32-48-51-000-005
 Removal of the Fan Assy (7GS,8GS,9GS,10GS) 1. Reason for the Job__________________
 Self Explanatory 2. Job Set-up Information______________________ A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps No specific circuit breaker(s) safety clip(s) No specific safety barriers No specific warning notice B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  **ON A/C 301-399,
R  32-48-51-991-005 **ON A/C 401-499,  Fig. 401 
R  32-48-51-991-005-A  Fig. 401A 

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R  **ON A/C 301-399, 401-499,
 3. Job Set-up__________ Subtask 32-48-51-941-054
 A. Safety Precautions (1) Put the safety barriers in position. (2) In the cockpit, on the panel 400VU put the warning notice in position to tell persons not to operate the landing gear control lever. (3) Make sure that the wheel chocks are in posistion. Subtask 32-48-51-865-063
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
R  **ON A/C 301-399,
R  121VU HYDRAULIC/BRK FAN/WHEELS/3 AND 4 121VU HYDRAULIC/BRK FAN/WHEELS/1 AND 2 121VU HYDRAULIC/BRK/FAN/CTL **ON A/C 301-399, 401-499, 2GS 1GS 3GS  L35L32M32 
4. Procedure_________ 
R  **ON A/C 301-399,
R  (Ref. Fig. 401/TASK 32-48-51-991-005) **ON A/C 401-499, 
R  (Ref. Fig. 401A/TASK 32-48-51-991-005-A) 

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 Subtask 32-48-51-020-054
 A. Removal of the Fan Assy
 (1)
 Release the tab-washers (14).

 (2)
 Remove the screws (13) .

 (3)
 Remove and discard the tab-washers (14) .

 (4)
 Remove the guard assy (15). NOTE : Remove the guard assy (15) along the centerline of the axle so

____ that you do not cause damage to the splines (7).

 (5)
 Remove the impeller (18)

 -Cut and remove the lockwire and discard it
 -Hold the impeller (18) with DISASSEMBLY TOOL (MG174-04), remove the nut (16) and the washer (17).
 -Remove the impeller (18).

 (6)
 Remove the shroud (19).

 (7)
 Remove the nut (22) and the collar (23).

 (8)
 Remove the joint (20).

 (9)
 Remove the cotter pins (11) and discard them. Remove the nuts (10), the washers (9) and the bolts (8).

 (10) Remove the motor assy (6). NOTE : When you remove the motor assy (6), do not cause damage to the
____
 electrical cables of the motor assy.

 NOTE : Do not apply pressure against the rotating components of the
____
 tachometer.

 (11)
 Disconnect the connector (1) from the tachometer (5) and put the blanking caps in position.
　
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