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12-15-02
ALL ú ú 01 Page 312 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
K16703
A
757 MAINTENANCE MANUAL
LANDING GEAR TIRES - SERVICING
______________________________
1. General
_______
A. This procedure contains one task. The task is to inflate a tire by one of these two procedures:
(1)
Fill the tires with nitrogen to the pressure that is necessary.
(2)
Add nitrogen and air (if it is necessary) to a tire that is not fully inflated.
NOTE: We use the word "refill" or the word "top-off" as an
____ alternative to the word "add" as shown in these examples:
-Add nitrogen and air to a tire.
-Refill the tire with nitrogen and air.
-Top-off the tire with nitrogen and air.
TASK 12-15-03-613-001
2. Servicing of the Main and Nose Gear Tires
_________________________________________
A. Equipment
(1) Tire Inflation Tool - F70199-1
B. Consumable Materials
(1)
Dry Nitrogen - Commercial grade (99.5 percent pure nitrogen), from a regulated source
(2)
Dry Air - If nitrogen is not available - a source of clean dry air
____________________________ with maximum moisture content that is equivalent to an atmospheric dew point of -20°F (-29°C), from a regulated pressure source
C. References
(1)
AMM 32-45-01/401, Main Gear Tires
(2)
AMM 32-45-02/401, Nose Gear Tires
D. Access
(1) Location Zones
731 Left Main Landing Gear
741 Right Main Landing Gear
711 Nose Landing Gear
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
12-15-03
ú ALL ú
ú ú ú 01.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 301Sep 28/02
A
757
MAINTENANCE MANUAL
ú E. Preparation for Servicing of the Main and Nose Gear Tires
ú
ú S 843-030
ú
ú
CAUTION: USE A CALIBRATED GAGE WITH AN APPROVED DIAL TO DO A CHECK OF_______
ú THE TIRE PRESSURE. IF THE GAGE IS NOT ACCURATE, YOU CAN
ú INFLATE THE TIRE TO THE INCORRECT PRESSURE. THIS CAN CAUSE
ú DAMAGE TO THE TIRE.
ú
ú (1) Obey this CAUTION during all of this task.
ú
ú S 843-042
ú (2) Some airplanes have a tire pressure gage installed in the wheels.
ú The tire pressure gage is part of an assembly that includes the gage
ú and the tire fill valve. You can use the gage for walk-around
ú inspections and other fast checks. You must use a calibrated gage
ú with an approved dial when you inflate a tire. You must also use
ú the calibrated gage when the tire pressure indication must be very
ú accurate.
ú
ú S 843-039
ú (3) All tires must initially be inflated with nitrogen.
ú
ú S 843-041
ú (4) You can add air to the tire when nitrogen is not available, but you
ú must obey this limit:
ú (a) The oxygen in the air that you add must not be more than 5
ú percent of the total tire volume.
ú
ú S 843-038
ú (5) Two procedures to refill the tire are given in paragraph 2.F.(3)(d),
ú Service the Main and Nose Gear Tires (Fig. 301).
ú (a) The first procedure permits one value of 13 psi for the sum of
ú all the air refill pressures. This procedure is more easy to
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