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ALL ú ú 01 Page 211 ú Feb 18/00
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A
747-400 MAINTENANCE MANUAL
DRIVE UNIT NO. 4 OFFSET GEARBOX
DRIVE SHAFT
A ROTARY KRUEGER ACTUATOR FLAP (2 LOCATIONS)
A ACTUATOR LINKAGE
WING LEADING EDGE
CLEARANCE
STRUCTURE INDICATOR PIN
B
0.04-0.10
RETRACT
INCH STOP BOLT
RETRACT STOP
B
KRUEGER FLAP WASHERS STOP BOLT BRACKET ACTUATOR ARM ON ROTARY
SEE A B-B
FLAP RETRACTED A-A
0.04 INCH KRUEGERAFT MAXIMUMFLAP
KRUEGER FLAP
0.05 INCH MAXIMUM
6-INCH 6-INCH
STRAIGHTEDGE STRAIGHTEDGE 1.25-1.75 1.25-1.75 INCHES INCHES
POSITIVE CONTOUR
NEGATIVE CONTOUR AT FLAP LINKAGES
AT FLAP LINKAGE
A
A
Krueger Flap Linkage Adjustment Figure 203
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27-81-03
ALL ú ú 01 Page 212 ú Jun 18/99
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A
747-400
MAINTENANCE MANUAL
MOUNTING MOUNTING LUG
BOLT (2 LOCATIONS) O-RING AND
SLEEVE ELECTRICAL CONNECTOR
PNEUMATIC DUCT
ELECTRICAL CONNECTOR
MOUNTING BOLT
DRIVE SHAFT
SEE A 1. COUPLING/SPLINE
DRIVE SHAFT
COUPLING SLEEVE
SCREW DRIVE (2 LOCATIONS) SHAFT
MOUNTING BOLT AND CLAMP-UP 2. COUPLING/OUTPUT DRIVEBUSHING SPLINE UNIT
A
DESIGN LIMITS WEAR LIMITS
NO. INDEX PART NAME DIM. DIAMETER MAXIMUMMINIMUM WEAR DIMENSION PERMITTED CLEARANCE DIAMETER MAXIMUM REPLACE WORN PART REPAIR WORN PART INSTR REPAIR
INCHES INCHES INCHES INCHES
(mm) (mm) (mm) (mm)
0.0982 0.0994 0.1082
X
COUPLING 1 0.0100(2.4942) (2.5247) (2.7482)
1
(0.254)
0.0970 0.0982 0.0882
X
SPLINE 2 3
(2.4638) (2.4942) (2.2402) 0.0982 0.0994 0.1082
X
COUPLING 1 0.0100
(2.4942) (2.5247) (2.7482)
(0.254)
2
OUTPUT 0.0970 0.0982 0.0882
X
2 3
SPLINE (2.4638) (2.4942) (2.2402)
1
CIRCULAR SPLINE SPACE WIDTH 2
CIRCULAR SPLINE TOOTH THICKNESS 3
SPLINE BACKLASH MEASURED ON PITCH DIAMETER
Power Drive Unit Wear Limits Figure 204
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747-400
MAINTENANCE MANUAL
(2)
D00068 Oil-Jet Engine Oil - MIL-PRF-23699 (AMM 20-30-04/201)
(3)
D00049 Silicone Fluid - Viscasil 10000
C. Parts ~.............................................................................. | AMM | | AIPC | ................. ...........................| | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ...............................................................................| | 201 | 8 | Solenoid Valve (Alternate) | 27-81-03 | 01 | 395 | | | 9 | Screw | | | 315 | | | 9 | Screw (Holding Clamp) | | | 160 | | | 10 | Washer | | | 150 | | | 11 | Packing (O-ring) | | | 320 | | | 11 | Packing (O-ring) | | | 325 |
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