757 AMM 飞机维护手册 SERVICING 1(58)

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 correct pressure for the airplane gross weight (Fig. 301).
 (d) If the measured tire pressure is below the necessary pressure
 by no more than 5 percent, inflate the tire to the necessary
 pressure.
 (e) If the measured tire pressure is between 5%-10% below the
 necessary pressure, do these steps:
 WARNING: USE A REGULATED PRESSURE SOURCE TO SERVICE THE TIRES._______
 AN UNREGULATED PRESSURE SOURCE CAN CAUSE INJURIES TO
 PERSONS AND DAMAGE TO EQUIPMENT.
 SERVICING CART AND ALL PERSONNEL SHALL BE POSITIONED
 FORE OR AFT (TREAD SIDE) OF TIRE WHEN SERVICING TO
 PREVENT INJURIES, DEATH AND EQUIPMENT DAMAGE.
 1) Inflate the tire to the necessary pressure.
 2) Do a check of the pressure again after 24 hours.

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 12-15-03
 ALL  ú ú 01.1 Page 305 ú Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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MAINTENANCE MANUAL

 3)  If the tire pressure is more than 5% below the necessary pressure again, replace the tire. a) Remove the wheel and tire assembly (AMM 32-45-01/401,
 Main Gear) (AMM 32-45-02/401, Nose Gear). b) Send the wheel and tire assembly for an inspection to find the cause for the low tire pressure.
 (f)  
If the measured tire pressure is between 10%-20% below the necessary tire pressure, do these steps: 1) Replace the wheel and tire assembly.

 a)  Send the wheel and tire assembly for an inspection to find the cause for the low tire pressure.

 (g)  
If the measured tire pressure is more than 20% below the necessary tire pressure, do these steps: 1) Replace the tire and wheel asssembly.

 a)  Send the wheel and tire assembly for an inspection to find the cause for the low tire pressure.
 2)  If the wheel and tire assembly has turned with the airplane weight on it after the pressure has decreased, replace the wheel and tire assembly installed on the opposite side of that axle. a) Mark on the tire that it was on the same axle with a
 wheel and tire assembly that was replaced because of low tire pressure. b) Send the tire for inspection for damage.
 S 613-006
 WARNING:_______INITIALLY FILL THE TIRE WITH NITROGEN. A HOT TIRE THAT IS FILLED WITH AIR WILL MAKE EXPLOSIVE GASES. IF YOU FILL THE TIRE WITH AIR, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  To inflate a tire (initial inflation):
 (a)  Use the instructions on the tire inflation tool and install the tool.
 WARNING: USE A REGULATED PRESSURE SOURCE TO SERVICE THE TIRES.
_______ AN UNREGULATED PRESSURE SOURCE CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 SERVICING CART AND ALL PERSONNEL SHALL BE POSITIONED FORE OR AFT (TREAD SIDE) OF TIRE WHEN SERVICING TO PREVENT INJURIES, DEATH AND EQUIPMENT DAMAGE.
 (b)  
Inflate the tire with nitrogen to the pressure shown on Fig. 301.

 (c)  
Remove the tire inflation tool.

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 12-15-03
 ú  ALL  ú
 ú ú  ú 01.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 306Sep 28/02 

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757
MAINTENANCE MANUAL

 S 613-004
 (3)  To add nitrogen or air to a tire that is not fully inflated (top-off):
 (a)  
Use the instructions on the tire inflation tool and install the tool.

 (b)  
If the volume of the oxygen in the tire will be more than 5 percent, refill the tire as follows:

 NOTE: See the refill procedure in the steps that follow
____
 to calculate the volume of oxygen.

 1) Deflate the tire to atmospheric pressure. 2) Inflate the tire by the procedure to inflate the tire for initial inflation.
 (c)  
Refill (top-off) the tire with nitrogen to the pressure that is necessary (Fig. 301).

 (d)  
Refill (top-off) the tire with air as shown in Procedure 1 or Procedure 2.

 NOTE: You can use air when nitrogen is not available but you
　
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