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747-400
MAINTENANCE MANUAL

3. BEARING/TRACK

(0.57-0.66 cm)

Inboard Foreflap Track and Midflap Roller Wear Limits
Figure 601 (Sheet 1)

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INDEX 1 NO.  OD ID BUSHING ROLLER PART NAME DIM.  (cm)(cm) DESIGN LIMITS (1.412) (1.417) 0.55800.5560 (1.422) (1.425) 0.56100.5600 MINIMUM INCHES INCHES MAXIMUM DIAMETER  (cm) WEAR LIMITS (1.397) 0.5500 INCHES DIMENSION WEAR PERMITTED 1  (0.025) 0.010 (cm) INCHES CLEARANCE DIAMETER MAXIMUM  X REPLACE WORN PART  INSTR REPAIRREPAIR WORN PART 
X 
2  TRACK X XROLLER  (5.08)(5.03) 1.980 2.000 (0.660) 0.260 (0.648) 0.255  (4.593) 1.950 (0.572) 0.225 1  2  X 
X 
3  TRACK BEARING OD 5  (7.607) 2.995 (7.633) 3.005 (6.033) 2.375 (6.030) 2.374  4  3  X 
X 

IF THE TEFLON LINER IS TORN OR WORN, THE ROLLER MUST BE REPLACED
YOU CAN ADD A 63B11367-5 SHIM WASHER BETWEEN THE ROLLER AND BUSHING IN THE RIB ON THE MIDFLAP TO KEEP THE 0.014-0.064 INCH (0.04-0.16 cm) DIMENSION BETWEEN TRACK AND ROLLER AND 0.25 INCH (0.64 cm) SIDE MOVEMENT OF THE TRACK AT FLAP LEADING EDGE. EXAMINE THE SIDE MOVEMENT, WITH THE TRACK EXTENDED 10 TO 12 INCHES FROM THE MIDFLAP LEADING EDGE WHILE YOU APPLY HAND PRESSURE TO ENGAGE THE TRACK IN BOTH SETS OF ROLLERS. THE CHROME PLATING ON THE TRACK EDGE SURFACE THAT TOUCHES THE ROLLER SHOULD NOT BE WORN THROUGH TO THE BASE METAL

THE DESIGN CLEARANCE BETWEEN THE TRACK AND ROLLER IS A FUNCTION OF THE DISTANCE BETWEEN THE UPPER AND LOWER ROLLERS AND TRACK HEIGHT. THE CLEARANCE ALSO CHANGES WITH DIFFERENT CONDITIONS OF TRACK EXTENSION. THE WEAR LIMITS ARE PRESENTED IN TERMS OF WORN ROLLER DIAMETER AND WORN TRACK HEIGHT
THE BEARING OR ROLLER INDENTATION WEAR ON THE FOREFLAP TRACK MUST NOT BE MORE THAN
0.02 INCH (0.05 cm)
THE HEIGHT OF THE TRACK
Inboard Foreflap Track and Midflap Roller Wear Limits
Figure 601 (Sheet 2)

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1 INDEX NO.  ARM BUSHING PART NAME DIM. ID OD  1.2677 (3.220) (3.226) (3.219) (3.197) 1.2672 1.27001.2685 DIAMETER MAXIMUM INCHESINCHES MINIMUM (cm) (cm) DESIGN LIMITS  (3.203) (3.239) 1.275 1.261 PERMITTED WEAR DIMENSION INCHES (cm) WEAR LIMITS  (0.018) 0.007 MAXIMUM DIAMETER CLEARANCE INCHES (cm)  X PART WORN REPLACE  REPAIR INSTR PART WORN REPAIR 
X 
2  ODARM BUSHING 1  (12.802) (0.239) 5.040 0.094 (12.776) (0.226) 0.089 5.030  (0.213) 0.084 2  0.050 (0.130)  X 
X 

BUSHING FLANGE THICKNESS THE PLATING MUST NOT BE WORN THROUGH

Inboard Aftflap Arm Assembly Wear Limits Figure 602
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 INBOARD FOREFLAP - REMOVAL/INSTALLATION
_______________________________________
 1.  General_______
 A.  This procedure contains two tasks. The removal and the installation of an inboard foreflap.
　
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