757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 3(74)

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 (6)  Do step (a) to examine the wheel and tire assembly to see if it is safe to remove the assembly without tire deflation or do step (b) to deflate the tire.
 NOTE: If you will not install the same wheel and tire assembly,
____ deflate the tire to prevent transporting an inflated tire.
 (a)  Examine the wheel and tire assembly and, if you have the conditions that follow, it is not necessary to deflate the tire: 1) The tire is not worn too much (AMM 32-45-04/601) 2) The tire is cool enough to be comfortably touched with the
 bare hand. 3) There is no evidence of wheel damage, including cracked or missing tie bolts or tie nuts, or cracks in the wheel. 4) If you do not meet the conditions in the preceding steps, deflate the tire as shown in step (b).
 

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 (b)  Deflate the tire with the tire deflation tool.
 1)  If you think that the valve core is damaged so that you can not use the normal procedure to deflate the tire, do these steps:
 WARNING: MAKE SURE THAT ALL PERSONS ARE CLEAR OF THE
_______ VALVE PATH. IF THE VALVE BLOWS OFF WHILE YOU REMOVE IT, INJURY TO PERSONS CAN OCCUR.
 CAUTION: DO NOT USE TOO MUCH FORCE ON THE VALVE CORE.
_______ THE CORE PARTS CAN MOVE APART AND LET THE SLEEVE AND THE LOWER END OF THE POPPET STAY IN THE VALVE STEM.
 a)  Turn the valve assembly slowly in a counterclockwise
 direction until air begins to leak through the boss. b) At the same time, push lightly on the valve assembly. 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.
 S 034-047
 CAUTION: BE CAREFUL THAT YOU DO NOT HIT THE HUBCAP OR THE ANTISKID
_______
 TRANSDUCER ASSEMBLY WHILE YOU REMOVE THE HUBCAP. THE TRANSDUCER DRIVE ON THE INSIDE OF THE HUBCAP ASSEMBLY DISENGAGES FROM THE ANTISKID TRANSDUCER IN THE AXLE WHEN YOU REMOVE THE HUBCAP. IF UNWANTED FORCE IS APPLIED TO THESE PARTS WHEN THEY ARE PARTLY DISENGAGED, THEY CAN BE DAMAGED.
 (7)  
Remove the three hubcap attachment bolts (5).

 S 034-010

 (8)  
Pull the hubcap assembly (4) away from the axle while you hold it level, to disengage the transducer drive on the hubcap assembly from the coupling on the transducer.

 S 024-012
 CAUTION: BE CAREFUL THAT YOU DO NOT HIT THE ANTISKID TRANSDUCER
_______ AFTER YOU REMOVE THE WHEEL RETENTION NUT LOCKBOLTS. THE TRANSDUCER CAN TURN FREELY IN THE AXLE WHEN THE LOCKBOLTS ARE NOT INSTALLED. DAMAGE CAN OCCUOR IF IT IS HIT OR SHAKEN.
 (9)  
Remove the two lockbolts for the wheel retention nut (8).

 (10)
 Remove the wheel retention nut (3) with the wheel nut wrench.

 S 024-013
 

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 S 024-014
 (11)
 Remove the washer (2).

 S 494-015

 (12)
 Install the thread protector on the axle.

 S 024-016
 CAUTION: BE CAREFUL WHEN YOU MOVE THE WHEEL AND TIRE ASSEMBLY.
_______ BECAUSE THE ASSEMBLY WEIGHS APPROXIMATELY 242 POUNDS (STEEL BRAKE) 0R 275 POUNDS (CARBON BRAKE), INJURY CAN OCCUR.
 (13)
 Put the wheel change dolly below the wheel.

 S 024-050

 (14)
 Remove the wheel and tire assembly.

 S 494-018

 (15)
 Install the protective cover on the inner wheel surface.

 S 024-019

 (16)
 Remove the wheel spacer (11).

 TASK 32-45-01-404-020
 3. Install the Main Gear Wheel and Tire (Fig. 401)
____________________________________
 A. Equipment
 (1)  
Dolly - Wheel Change - Malabar 175

 (2)  
Wheel Equipment - B32010-14 (Preferred):

 Includes B32010-16 or -23 wrench assembly B32010-3 thread
 protector Wheel Equipment - B32010-1 (Optional) Includes B32010-4 wrench assembly B32010-3 thread protector
 (3)  
Protective Cover - Inner Wheel Surface -BTA-72032, Bill Thomas Assoc. Inc., 7405
 Woodley Ave., Van Nuys, California

 B.
Consumable Materials

 (1)  
D00378 Grease, Wheel Bearing -Aeroshell 22 (Preferred)
 Mobilgrease 28 (Optional)

 

 

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