B.
The axle sleeve has a touched fit on the landing gear axle. It is necessary to use the procedure of differential temperature to remove or install this component.
TASK 32-21-09-004-001
2. Nose Landing Gear Axle Sleeve Removal (Fig. 401)
_____________________________________
A. Special Tools and Equipment
(1)
G32010 - Puller Equipment, Axle Sleeve
B.
Standard Tools and Equipment
(1)
Heat Blanket - Electrical (300°F maximum)
(2)
Thermometer - Surface Measurement (0° - 350°F)
C.
Consumable Materials
(1)
G00829 Ice - Dry (Commercial Grade)
D.
References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
AMM 32-45-02/401, Nose Landing Gear Tire/Wheel Assembly
E.
Access
(1)
Location Zone
715 Nose Landing Gear
F.
Prepare for the Procedure
S 494-002
WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Install the ground locks in all landing gear (AMM 09-11-00/201).
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32-21-09
ALL ú ú 01 Page 401 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
AXLE SLEEVE
HYDRAULIC
HAND PUMP
HYDRAULIC
A RAM
A
FWD
SEE A
TUBE ASSEMBLY
FWD AXLE SLEEVE REMOVAL
A
1
AXLE
AXLE SLEEVE
2
2
A-A AFTER INSTALLATION MINIMUM CLEARANCE (3.048 mm) 0.120 INCH
1 DO NOT REMOVE THE GREASE FROM THIS AREA.
2 APPLY BMS 3-33 GREASE TO THESE AXLE SURFACES BEFORE YOU INSTALL THE AXLE SLEEVE.
Axle Sleeve Installation for the Nose Landing Gear
Figure 401
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32-21-09
ALL ú ú 01 Page 402 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
M23270
A
747-400 MAINTENANCE MANUAL
S 494-003
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do this task: "Installation of the Door Locks on the Nose Landing Gear" (AMM 32-00-30/201).
S 494-004
(3)
Do this task: "Installation of the Door Locks on the Wing and Body Landing Gear" (AMM 32-00-30/201).
G.
Procedure
S 034-005
(1)
Remove the tire/wheel assembly from the axle (AMM 32-45-02/401).
S 884-017
(2)
Decrease the temperature of the axle for the removal of the axle sleeve:
NOTE: The cold temperature will decrease the axle diameter.
____ When you subsequently apply heat to the axle sleeve, the fit between the axle sleeve and the axle will loosen.
WARNING:_______DO NOT GET THE DRY ICE ON YOUR SKIN. THE DRY ICE IS FROZEN CARBON DIOXIDE AT A TEMPERATURE OF APPROXIMATELY -120°F. THE COLD TEMPERATURE OF THE CARBON DIOXIDE CAN CAUSE INJURY TO PERSONS.
(a) Fill the inner diameter of the axle with the dry ice.
NOTE: When the steam from the dry ice almost stops, the axle
____ temperature will be near the temperature of the dry ice (-120°F). This is the recommended condition.
(b) Add more dry ice to the inner diameter of the axle before you install the axle sleeve puller.
NOTE: This will keep the axle at a constant temperature when
____ you apply heat to the axle sleeve.
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本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 3(158)
