TASK 12-15-06-613-006
 2. Service the Main and Nose Gear Tires
____________________________________
 A. Special Tools and Equipment
 (1)  
A12007-11 - Tire Inflation Adapter

 (2)  
F70199-13 or F70199-17 - Tire Inflation Tool

 B. Consumable Materials
 (1)  
G01158 Nitrogen, Gaseous (Dry, Commercial
 Grade, 99.5 percent pure)

 (2)  
If nitrogen is not available,
 Source of Clean Dry Air, maximum moisture
 content that is equivalent to an atmospheric
 dew point of -20° F (-29° C)

 C. References
 (1)  
AMM 32-45-01/401, Main Gear Tire and Wheel

 (2)  
AMM 32-45-02/401, Nose Gear Tire and Wheel

 (3)  
AIPC 32-45-01 Fig. 2

 (4)  
AIPC 32-45-02 Fig. 1

 D. Access
 (1)  Location Zone
 715 Nose Landing Gear
 735 Wing Landing Gear, L.H.
 745 Wing Landing Gear, R.H.
 755 Body Landing Gear, L.H.
 765 Body Landing Gear, R.H.

 E. Find the Tire Service Pressure
 NOTE: Figure 301 contains the Tire Pressure Limit Chart for the nose
____ landing gear. Figure 302 contains the Tire Pressure Limit Chart for the main landing gear.
 S 973-018
 CAUTION: TO OPERATE AT A HIGHER GROSS WEIGHT, ADJUST THE TIRE PRESSURE
_______ AS SHOWN IN THE TIRE PRESSURE LIMIT CHARTS. DAMAGE TO THE TIRES WILL OCCUR IF THE TIRE PRESSURE IS NOT CORRECT FOR THE AIRPLANE GROSS WEIGHT.
 (1)  Use the Tire Pressure Limit charts to find an applicable tire pressure for the main and nose gear tires for the in-service maximum taxi gross weight. If the airplane is usually operated at less than the maximum gross weight (for example, pilot training), you can lower the pressure as shown in the Tire Pressure Limit charts. The maximum pressure shown on the Tire Pressure Limit charts can be used at all gross weights.
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 12-15-06
 ALL  ú ú 10 Page 302 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 613-008
 (2)  Use the same pressure in all of the main tires and the same pressure in all of the nose tires.
 F. Tire Pressure Check
 NOTE: Figure 301 contains the Tire Pressure Limit Chart for the nose
____ landing gear. Figure 302 contains the Tire Pressure Limit Chart for the main landing gear.
 S 863-009
 (1)  
Let the tire cool for a minimum of 2 hours after a flight.

 S 613-010

 (2)  
Use an accurate gage to do a tire pressure check.

 S 613-011

 (3)  
Compare the measured pressure with the tire pressure you found in the Tire Service Pressure Limit Charts and do the applicable steps that follow:

 (a)  
If the tire pressure is less than the specified pressure by no more than 5 percent, inflate the tire to the specified pressure. It is not necessary to do more checks.

 (b)  
If the tire pressure is between 5 percent and 10 percent less than the specified pressure, do the steps that follow:

 WARNING: USE A REGULATED PRESSURE SOURCE TO SERVICE THE TIRES.
_______ AN UNREGULATED PRESSURE SOURCE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 1) Inflate the tire to the specified pressure. 2) Do a check of the pressure again after 24 hours. 3) If the tire pressure is more than 5 percent below the
 specified pressure again, do these steps: a) Replace the wheel and tire assembly (AMM 32-45-01/401 and AMM 32-45-02/401).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 08 Page 303 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 b)  Send the wheel and tire for an inspection to find the cause for the low tire pressure.
 (c)  
　
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