0.0050

(0.127)

(0.127)

0.0050
2

PROVIDE A CADMIUM PLATED STEEL BUSHING. BORE THE HOLE TO GET A 0.0004 TO 0.0014 INCH (0.01016 TO 0.03556 mm) INTERFERENCE FIT (0.3215 INCH (8.1661 mm) MAXIMUM).
Spoiler Differential Mechanism Installation
Figure 201 (Sheet 3)

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A
747-400 MAINTENANCE MANUAL
 (f)  
Remove the bolt (7 or 11), washer (9), bushing (8 or 12), and nut (10) from the differential mechanism.

 (g)  
Remove the differential mechanism (13).

 (h)  
Remove the couplings and the bolts, washers, and nuts from the differential mechanism.

 TASK 27-61-03-402-007
 3. Spoiler Differential Mechanism Installation (Fig.___________________________________________201)
 A. Consumable Materials
 (1)  
A00344 Compound - Soft Filmed (corrosion preventive), MIL-C-16173, Grade 2

 (2)  
D00633 Grease - BMS 3-33 (recommended)

 (3)  
D00013 Grease - MIL-G-23827 (alternative)

 B.
Parts

 ~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201  |  1 | Bolt | 27-61-03 | 02 | 205 | | | 2 | Washer | | | 210 | | | 3 | Nut | | | 215 | | | 4 | Bolt | | | 65 | | | 5 | Washer | | | 70 | | | 6 | Nut | | | 75 | | | 7 | Bolt | | | 175 | | | 8 | Bushing | | | 195 | | | 9 | Washer | | | 185 | | | 10 | Nut | | | 190 | | | 11 | Bolt | | | 180 | | | 12 | Bushing | | | 200 | | | 13 | Differential Mechanism | | | 220 | | | 14 | Bolt | | | 45 | | | 15 | Washer | | | 50 | | | 16 | Nut | | | 55 | | | 17 | Bolt | | | 40 | 2......…........…...................................…..........….....….........1
 C. References
 (1)  
12-21-21/301, Spoiler Control System

 (2)  
32-00-30/201, Landing Gear Door Locks

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A
747-400
MAINTENANCE MANUAL

 D.  Access
 (1)  
Location Zone
 135 Wing Landing Gear Wheel Well, LH
 136 Wing Landing Gear Wheel Well, RH

 E.  
Procedure

 S 282-037
 (1)  
If you will install used parts, do this task: "Spoiler Differential Mechanism Inspection" (Ref Paragraph 5).

 S 422-008

 (2)  
Install the differential mechanism (Fig. 201):

 (a)  
Apply a thin layer of the corrosion preventive compound to the shafts of the quadrant coupling that have splines.

 (b)  
Install the two couplings on the output shafts of the differential mechanism.

 (c)  
Move the central control actuator link until it will not touch when you install the differential mechanism (13).

 (d)  
Align the differential mechanism with the mounting holes.

 1)  Make sure the lower differential mechanism is in the slot on the structure.

 (e)  
Install the four bolts (1), washers (2), and nuts (3).

 (f)  
Install the bolt (7 or 11), washers (9), bushing (8 or 12), and nut (10). 1) Hand tighten the nuts (3 and 10).

 (g)  
Turn the central control actuator link to align the splines.

 NOTE: Only one position of the couplings is possible because
____ of the groove in the quadrant shaft.
　
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