TASK 32-41-02-404-009
 3.  Brake Pedal Bus Crank Assembly - Installation (Fig. 401)_____________________________________________
 A. General
 (1)  
In subsequent steps:

 (a)  
The crank assembly for the brake pedal bus is referred to as the bus crank assembly.

 (b)  
The pushrod for the brake control quadrant is referred to as the control quadrant pushrod.

 (c)  
The lower bearing retainer assembly is referred to as the lower bearing retainer.

 (d)  
The brake pedal bellcrank assembly is referred to as the bellcrank assembly.

 B.
Special Tools and Equipment

 (1)  
G12001-46 Kit - Rigging Pin ~................................................................. | Rig pin | No. 1 (left bus crank assembly) Use G12001-22 | ................................................................... | Rig pin | No. 2 (right bus crank assembly) Use G12001-22 | ................................................................... | Rig pin | No. 3 (left brake metering valve control quadrant) | | | Use G12001-15 | ................................................................... | Rig pin | No. 4 (right brake metering valve control quadrant) | | | Use G12001-15 | 2..........…......................................................1

 C.
Consumable Materials

 (1)  
A00247 Sealant - BMS 5-95

 (2)  
C00259 Primer - BMS 10-11

 (3)  
C00174 Corrosion Preventative Compound - MIL-C-1673, Grade 2

 D.
References

 (1)  
AMM 09-11-00/201, Towing

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 32-41-02
 ALL  ú ú 01 Page 405 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

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

 (3)  
AMM 25-22-01/401, Main Passanger Cabin Ceiling Access Panels

 (4)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (5)  
AMM 32-00-30/201, Landing Gear Door Locks

 (6)  
AMM 32-41-00/501, Hydraulic Brake System

 (7)  
AMM 32-42-13/401, Brake Pedal Switch

 (8)  
AIPC 32-41-02 Fig. 1

 (9)  
AIPC 32-41-34 Fig. 1

 E.
Access

 (1)  
Location Zones
 135 Wing Landing Gear Well, LH
 (left brake metering valve)
 136 Wing Landing Gear Well, RH
 (right brake metering valve)
 211 Passenger Cabin Nose to Fisrt Door, LH
 (left bus crank assembly)

 212  Passenger Cabin Nose to First Door, RH (right bus crank assembly)
 F. Prepare for the Installation
 S 494-010
 (1)  Make sure that the landing gear ground locks are installed
 (AMM 09-11-00/201).

 S 494-011
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).

 S 494-027

 (3)  
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).

 S 494-012

 (4)  
Install a rig pin in the right and left metering valve control quadrant (left and right wing gear wheel well, outboard side).

 S 494-013

 (5)  
Install rig pins through the bell crank assembly below the brake pedals (4 locations).

 G.
Install the Brake Pedal Bus Crank Assembly (Fig. 401)

 S 424-014
 (1)  
Do these steps to install the bus crank assembly:

 (a)  
Make sure the lower bearing retainer contains a new bearing.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-41-02
 ALL  ú ú 01 Page 406 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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