747-400 AMM 飞机维护手册 起落架 LANDING GEAR 7(144)

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 (6)  Do one of the steps that follow:
 NOTE: If you plan to install the same wheel and tire assembly and
____ the assembly is safe, it is not always necessary to deflate the tire. However, if you will not install the same wheel and tire assembly, deflate the tire to prevent transporting an inflated tire.
 (a)  Inspect the wheel and tire assembly for the conditions that follow: 1) The tire is worn too much (AMM 32-45-04/601)
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 2) The tire has damage 3) The tire is unusually hot 4) The wheel has damage 5) One or more of the tie bolts have damage or are missing. 6) If you find one or more of these conditions you must
 deflate the tire.
 (b)  Deflate the tire:
 WARNING: WHEN YOU REMOVE THE VALVE ASSEMBLY, MAKE SURE THAT
_______ ALL PERSONS ARE CLEAR OF THE PATH OF THE VALVE. THE VALVE CAN BLOW OFF AND CAN CAUSE INJURY TO PERSONS.
 CAUTION: MAKE SURE THAT YOU DO NOT APPLY TOO MUCH FORCE WHEN
_______ YOU TURN THE VALVE CORE. TOO MUCH FORCE CAN CAUSE THE CORE PARTS TO COME APART AND LET SLEEVE AND THE LOWER END OF THE POPPET STAY IN THE VALVE STEM.
 1)  If the valve core has damage and you can not remove the pressure from the tire with the tire deflation tool, do the steps that follow: a) Turn the valve assembly counterclockwise slowly, at the
 boss, until the gas begins to leak through the boss. b) Push lightly on the valve stem to release the gas.
 NOTE: Do not remove the valve assembly until all the
____ gas is released from the tire.
 c) Remove the valve assembly from the tire after all the pressure in the tire has been released. 2) Remove the pressure from the tire with the tire deflation tool.
 F.  Remove the Tire/Wheel Assembly for the Nose Gear
 S 424-096
 (1)  Remove the clamp (12) and remove the hubcap (13) from the wheel (1).
 S 024-077
 WARNING: IT IS RECOMMENDED THAT YOU REMOVE ONLY ONE WHEEL/TIRE
_______ ASSEMBLY FROM THE NOSE GEAR AT A TIME. IF YOU REMOVE THE TWO WHEEL/TIRE ASSEMBLIES FROM THE NOSE GEAR AT THE SAME TIME, STRUCTURAL DAMAGE AND/OR INJURY TO PERSONS CAN OCCUR IF THE AIRPLANE FALLS.
 (2)  
Do the steps that follow to remove the tire/wheel assembly from the nose landing gear:

 (a)  
Remove the nuts (8), washers (9) and lockbolts (11) and remove the guide block (10) from the axle.

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TIRE AND WHEEL ASSEMBLY 
WHEEL CHANGE DOLLY 
AXLE JACK  HUBCAP INSTALLATION DSEE 
FWD  1. WHEEL 
AXLE NUT ESEE  INSTALLATION WHEEL FSEE 
13. HUBCAP 
14. ALIGNMENT SHAFT 
16. WASHERS  12. CLAMP 
15. BOLTS 
HUBCAP INSTALLATION D 
Figure 401 (Sheet 1) Nose Gear Tire/Wheel Installation 

K31300
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MAINTENANCE MANUAL

11. LOCKBOLT (2 LOCATIONS) 
6. AXLE NUT 
10. GUIDE BLOCK 
9. WASHER (2 LOCATIONS) 
8. NUT (2 LOCATIONS)  MINIMUM OF 1/2 ALL AROUND THREAD SHOWS 
AXLE NUT E 
AXLE SLEEVE 
SPACER 
20.  GREASE SEAL RETAINING RING BEARING 19. 7.  NUT AXLE RETAINING RING WASHER 1. 3. 4. 5. 6. WHEEL GREASE SEAL TIRE 2. BEARING 
WHEEL INSTALLATION F 
Figure 401 (Sheet 2) Nose Gear Tire/Wheel Installation 

K31301
　
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