-The air that you add can not cause the volume of the oxygen in the tire to be more than 5 percent.
 -To make sure that the oxygen does not become more than 5 percent, use one of the procedures that follow (Procedure 1 or Procedure 2):
 1)  Procedure 1:
 a)  Make a record of the quantity of the air that you add each time that you refill the tire. The sum of all the air refill pressures must not be more than 13 psi.
 EXAMPLE: You can add one 6 psi and one 7 psi refill of
_______ air. Deflate the tire and inflate it with nitrogen when it is necessary to increase the pressure again.
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757 MAINTENANCE MANUAL
 2)  Procedure 2:
 a)  Make a record of the quantity of the air that you add each time that you refill the tire (for example, 5 psi, 8 psi, etc.). The sum of all the quantities of air that you add must not be more than the maximum quantity shown in Fig. 302.
 EXAMPLE: For example, you initially inflate the tire
_______ to 165 psi with nitrogen. As shown in Fig. 302, the sum of all the quantities of air that you add can not be more than 30 psi. For example, you can add one 6 psi, one 14 psi, and two 5 psi refills. When it is necessary to add gas to the tire again, you must deflate the tire and inflate it with nitrogen.
 S 093-005
 (4)  Remove the tire inflation tool.
 TASK 12-15-03-213-008
 3.  Main Landing Gear and Nose Gear HOT Tire Pressure Check
_______________________________________________________
 A.  References
 (1)  
AMM 05-51-14/201, High Energy Stop

 (2)  
AMM 32-45-01/401, Main Gear Tires

 (3)  
AMM 32-45-02/401, Nose Gear Tires

 (4)  
AMM 32-00-15/201, Landing Gear Downlock Pins

 B.  Equipment
 (1)  
Gage - Tire Pressure, 0-300 psig (0-2069 KPa) (commercially availab le)

 (2)  
F70199-1 Inflator - Tire, Landing Gear Tires

 C.  Consumable Materials
 (1)  G00018 Nitrogen, Gaseous, pressurizing - BB-N-411, Type I or MIL-PRF-27401, Type I
 D.  Access
 (1)  Location Zones
 731 Left Main Landing Gear
 741 Right Main Landing Gear
 711 Nose Landing Gear

 E.  Prepare for the Procedure
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MAINTENANCE MANUAL

 ú
 ú  S 843-044
 ú 
        ú
 WARNING:_______ DO NOT GO NEAR WHEEL, BRAKE, OR TIRE EQUIPMENT WHICH ARE
 ú  SUSPECTED OF BEING OVERHEATED.  DO THE PROCEDURE FOR HIGH
 ú  ENERGY STOP/HEAT DAMAGE.  INJURY TO PERSONS CAN OCCUR.
 ú
 ú  (1)  If the wheel, brake, or tire equipment is suspected of being
 ú  overheated, examine the landing gear clyinders, wheels and brakes
 ú  after the high energy stop condition (AMM 05-51-14/201).
 ú
 ú  S 843-046
 ú  (2)  The intent of this procedure is to provide a method to check tire
 ú  pressures prior to a two hour cool down of the tires, or for
 ú  pressure checks subsequent to the required daily pressure check.
 ú
 ú  S 843-047
 ú  (3)  It is recommended that you check the tire pressure after you let the
 ú  tires cool for a minimum of two hours since the airplane landed.
 ú
 ú  S 843-048
 ú  (4)  If it is not possible to wait the recommeded two hours for the tires
　
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