(2)
Micrometer - 1 to 2 inch (25 to 50 mm), To Measure Inner Dimensions

 (3)
Vernier Caliper

 (4)
Dial Indicator

 B.  
References

 (1)
AMM 27-51-33/401, Transmission

 C.  
Access

 (1)  
Location Zone 567 Outboard Flap Track Fairing, Outboard Flap, LH, (Track No. 1) 565 Inboard Flap Track Fairing, Outboard Flap, LH, (Track No. 2) 563 Outboard Flap Track Fairing, Inboard Flap, LH, (Track No. 3) 561 Inboard Flap Track Fairing, Inboard Flap, LH, (Track No. 4) 661 Inboard Flap Track Fairing, Inboard Flap, RH, (Track No. 5) 663 Outboard Flap Track Fairing, Inboard Flap, RH, (Track No. 6) 665 Inboard Flap Track Fairing, Outboard Flap, RH, (Track No. 7)

 667  Outboard Flap Track Fairing, Outboard Flap, RH, (Track No. 8)
 D.  Procedure
 S 786-006
 (1) Pressurize hydraulic systems No. 1 or 4 (AMM 29-11-00/201).
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A
747-400 MAINTENANCE MANUAL
 S 826-007
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
 CAUTION:_______MONITOR THE FLAP MOVEMENT CAREFULLY. THE FLAPS CAN BE DAMAGED BY INCORRECTLY ADJUSTED COMPONENTS.
 (2)  Put the flap control lever in the 30-unit position to extend the flaps.
 (3)  S 786-008Release the pressure in hydraulic systems No. 1 and 4 (AMM 29-11-00/201).
 (4)  S 216-009Check for wear between the housing and the output shaft (Fig. 601, Index No. 8).
 (5)  S 026-002Remove the transmission (AMM 27-51-33/401).
 (6)  S 226-003Examine the transmission: (a) Remove the parts to be examined. (b) Measure the parts.
 NOTE:____ Use a micrometer, vernier caliper or a dial indicator.
 (c) (d) (e)  Compare the dimensions you measured, with the permitted dimensions shown in Fig. 601.Replace the parts which are not in the tolerance.Install the parts.
 (7)  S 426-004Install the transmission (AMM 27-51-33/401).

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747-400
MAINTENANCE MANUAL

TRANSMISSION
SEE A
____TRANSMISSION NO. 1 SHOWN.
NOTE: TRANSMISSIONS NO. 2 THRU 8 ARE EQUIVALENT.
Transmission Wear Limits Figure 601 (Sheet 1)
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747-400 MAINTENANCE MANUAL
A
1. SLEEVE/COUPLING
A
TORQUE TUBE
INPUT SHAFT

2. COUPLING/SHAFT
5. U-JOINT/ TRANSMISSION
B
A-A
4. OUTPUT SHAFT/
INPUT SHAFT
LOCK WASHER CAP SCRW
(4 LOCATIONS)
B
(4 LOCATIONS)  BUSHING (4 LOCATIONS)
A
6. OUTPUT SHAFT
3. TORQUE BRAKE/
OUTPUT SHAFT

THRUST
C
WASHER (4 LOCATIONS)
7. YOKE
CROSS
C-C
C
8. HOUSING/
OUTPUT SHAFT B-B

Transmission and Ball Screw Wear Limits
Figure 601 (Sheet 2)

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