52-31-09
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 TASK 52-31-09-404-036
 3. Push-Pull Cam Mechanism Installation (Fig. 401)
____________________________________
 A. Standard Tools and Equipment
 (1)  
Rigging pin - ND-4, 0.250 |0.005 inch diameter, minimum length 4.0 inches.

 B.
Consumable Materials

 (1)  
A00626 Sealant - BMS 5-95

 C.
References

 (1)  
AMM 24-22-00/201, Manual control

 (2)  
AMM 52-31-00/501, Nose Cargo Door

 (3)  
AMM 52-31-09/601, Nose Cargo Door Push-Pull Cam

 D.
Access

 (1)  
Location Zone
 801 Nose Cargo Door

 E.
Prepare For Installation

 S 214-013
 (1)  
Make sure the safety barrier is installed across the door opening.

 S 224-014

 (2)  
If you install the used components, make sure to do a check for the wear limits (Ref 52-31-09/601).

 S 484-015

 (3)  
Supply electrical power (Ref 24-22-00/201).

 S 864-016

 (4)  
Open the nose cargo door to get access to the push-pull cam mechanism.

 NOTE: Push-pull cam actuator should be fully extended during
____ the removal and installation of the push-pull cam mechanism.
 S 864-017
 (5)
Open these circuit breakers and attach the DO-NOT-CLOSE tags:

 (a)  
On the Auxilary External 2 Power Center-Right panel P715: 1) NOSE CARGO DOOR

 (b)  
On the Power Distribution Center-Right panel P415: 1) 415F16, NOSE CARGO DOOR CONTROL

 (c)  
On the Nose Cargo Door Power panel H122: 1) DOOR LIFT 2) PULL UP CAM 3) LATCHES 1-4R 4) LATCHES 1-4L 5) LATCHES 5-8R

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 6) LATCHES 1-4L
 F. Cam Support Fitting Installation
 S 424-018
 (1)  
Install the cam support fitting with shims and fillers.

 S 214-019

 (2)  
Make sure to use the correct shim thickness.

 S 434-020

 (3)  
Install the attachment bolts, nuts and washers.

 S 434-021

 (4)  
Tighten nuts.

 G.
Push-Pull Cam Installation

 S 424-022
 (1)  
Install the push-pull cam on the cam support fitting with bolt, washers and nut.

 S 434-023

 (2)  
Tighten nut to 200-275 pound-inches.

 H.
Push-Pull Cam Actuator Installation

 S 424-024
 (1)  Fully extend the push-pull cam actuator and install it on the support fitting and cam with bolts, washers and nuts.
 NOTE: The push-pull cam actuator must be extended so that the cam
____ is in the open position after the actuator is installed.
 I. Cam Roller Support Fitting Installation
 S 864-025
 (1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
On the Auxilary External 2 Power Center-Right panel P715: 1) NOSE CARGO DOOR

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 02 Page 406 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (b)  
On the Power Distribution Center-Right panel P415:
 1) 415F16, NOSE CARGO DOOR CONTROL
　
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