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ACAC
Validity : Electrohydraulic generator
"COMMERCIAL HYDRAULICS" 1 2- 1 3-04Page 304
(DA) JUN 02
GAS
DESCRIPTION AND OPERATION
1. GENERAL
Dry air and nitrogen are used for inflation on aircraft.
This section includes the following maintenance practices :
- tire inflation - refer to 12-14-01,
- shock absorber inflation - refer to 12-14-02.
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TIRES
SERVICING
I 1. TIRE INFLATION (Figure 301 and Table 301)
A. Tools and consumable materials
- Tire inflation tool set
I - Safety cage
- Pressure gage
- Lintfree clean cloth
B. Procedure
WARNING : IF COLD AIR IS USED TO INFLATE A WARM TIRE, THE LATTER MAY BURST. ALWAYS
ALLOW TIRES TO COOL DOWN BEFORE ADJUSTING THE PRESSURE.
WARNING : INFLATE TIRES IN A SAFETY CAGE, EXCEPT WHEN ADJUSTING THE PRESSURE
ON AIRCRAFT.
CAUTION : IT IS PROHIBITED TO INSTALL TIRES WITH DIFFERENT TRADE MARKS. CAUTION : BEFORE INFLATING THE TIRES, MAKE SURE THEY ARE ENTIRELY FREE FROM
OIL, WORN PATCHES CAUSED BY BRAKING, STONES, CRACKS, NOTCHES, AND
SO ON.
1) Remove valve cap (1) from inflation valve (2).
2) Carefully clean inflation valve (2).
3) Make sure the tire has not rotated on the rim. If the red paint mark on the tire is out of line with the mark on the rim by 0.08 to 0.12 in (2 to 3 mm) minimum, replace the tire - refer to 32-41-01 or 32-41-02.
4) Connect the inflation hose equipped with a pressure gage to inflation valve (2).
5) Inflate the tire at the inflation P pressure - refer to Table 301 :
- For an ambient temperature of 70°F (21 °C), aircraft on jacks
. Nose tire : 56.5 psi (3.9 bars)
. Main tires : 63.9 psi (4.4 bars).
- For an ambient temperature of 70°F (21°C), aircraft on ground
. Nose tire : 58 psi (4 bars)
. Main tires : 65.3 psi (4.5 bars).
NOTE : When a tire is under load, aircraft on ground, the air chamber volume is reduced due to tire deflection. Therefore, the unloaded, aircraft on jacks, inflation pressure should be increased by 4%.
NOTE : An ambient temperature change of 5.4°F (3°C) produces approximately 1% pressure change.
6) Remove the inflation hose.
7) Using soapy water, check inflation valve (2) for leaks.
AEAC
Validity : S / N 1 - 9999 12-14 01Page 301
(DA) SEP 04
8) Install valve cap (1) on inflation valve (2).
9) Make sure all the tools and materials are removed and the work area is clean and free from debris.
2. TIRE INFLATION PRESSURE CHECK (Figure 301 and Table 301)
NOTE : Check and adjust the tire inflation pressure when tires are cold once a week and with the
aircraft on ground.
A. Tools and consumable materials
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TB20 MAINTENANCE MANUAL 12 SERVICING TB20飞机维护手册 12 保养(39)
