S 226-003
(1)
Do this task: "The Wheel Truck Removal on the Wing Landing Gear" (Ref 32-11-11/401).
(a)
Remove the pivot bolt assembly.
(b)
Remove the lower torsion link.
(c)
Remove the forward axle assemblies.
(2)
Examine the components of the wheel truck for worn areas.
S 226-005
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A 747-400 MAINTENANCE MANUAL
(3) S 216-006Examine the fit of the pivot bolt, the lower torsion link, the forward axle and the universal bolt assemblies. (a) Measure the parts at the locations shown in figure 601. (b) Compare the measured dimensions to the wear limits in figure 601. (c) If a part is not in tolerance, replace the part if you cannot repair it.
(4) S 426-004Do this task: "The Wheel Truck Installation on the Wing Landing Gear" (Ref 32-11-11/401).
(5) S 426-007Install the lower torsion link.
(6) S 426-008Install the universal.
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SEE A
A 1 B B
A C C
A
1 Wing Gear Wheel Truck Wear Limits Figure 601 (Sheet 1) FOR LOWER TORSION LINK INSPECTION/CHECK. REFER TO 32-11-14/601
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A 747-400 MAINTENANCE MANUAL
1. BUSHING/PIVOT PIN
A-A
2. BUSHING/WING GEAR
B-B
Wing Gear Wheel Truck Wear Limits
Figure 601 (Sheet 2)
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C-C
2 FOR WHEEL BEARING/SLEEVE WEAR LIMITS REFER TO 32-45-03/801.
Wing Gear Wheel Truck Wear Limits
Figure 601 (Sheet 3)
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NO. INDEX PART NAME DIM. DESIGN LIMITS WEAR LIMITS WORN PART REPLACE PART WORN REPAIR INSTR REPAIR
DIAMETER PER-MITTED WEAR DIM. 4 DIA MAX ANCE CLEAR-
MIN MAX
1 BUSHING ID 4.5000 4.5015 4.5057 0.0077 X
PIN OD 4.4980 4.4990 4.4938 X 9
2 BUSHING ID 1.2500 1.2510 1.2532 0.0062 X
BOLT OD 1.2470 1.2490 1.2448 X 9
3 BUSHING ID
BUSHING OD 6.1970 6.1990 6.1920 X
4 SLEEVE 10 ID 5.1245 5.1255 3 X
AXLE OD 5.1275 5.1290 5.1260 X
5 SLEEVE 10 ID 5.4945 5.4955 3
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