TASK 32-45-02-404-010
3. Install the Nose Gear Wheel and Tire (Fig. 401)
____________________________________
A. Equipment
(1)
Dolly - Wheel Change - commercially available
(2)
Protector - Nose Landing Gear Axle - B32021-1
(3)
Wrench - NLG Wheel Retaining Nut -(Commercially Available)
B.
Consumable Materials
(1)
D00378 Grease, Wheel Bearing Aeroshell 22 (Preferred) Mobilgrease 28 (Optional)
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(2)
D50005 Grease, Wheel Bearing -Mobil Aviation Grease SHC 100 (Optional).
(3)
D00388 Grease, Wheel Bearing
MIL-G-3545 Aeroshell 5 (Optional)
C.
Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Assembly-Wheel and Tire | 32-45-02 | 01 | 1 | | | 2 | Axle Washer | | | 225 | | | 3 | Lockbolt | | | 205 | | | 4 | Nut | | | 215 | | | 5 | Washer | | | 210 | | | 6 | Axle Nut | | | 220 | 2......…........…...................................…...........….....…........1
D. References
(1)
AMM 07-11-03/201, Jacking Airplane Axles
(2)
AMM 12-15-03/301, Landing Gear Tire
(3)
AMM 32-00-20/201, Landing Gear Downlocks
E.
Access
(1)
Location Zone
711 Nose Landing Gear (NLG)
F.
Procedure
S 094-024
(1)
Remove the nose landing gear axle protector, if installed.
S 214-011
(2)
Look at the part of the axle that you can see and do a check for scoring, galling, or corrosion.
S 024-012
CAUTION:_______MAKE SURE THAT THE WHEEL SPACER IS INSTALLED. IF THE SPACER IS NOT INSTALLED, THE WHEEL BEARING CAN BECOME LOOSE AND CAUSE SUBSEQUENT WHEEL FAILURE.
MAKE SURE THE WHEEL SPACER IS INSTALLED CORRECTLY ON THE AXLE. THE SPACER MAY MOVE WHEN THE WHEEL AND TIRE ASSEMBLY IS REMOVED. IF IT IS NOT IN ITS CORRECT POSITION, THE WHEEL AND TIRE ASSEMBLY WILL NOT INSTALL CORRECTLY. THIS CAN CAUSE DAMAGE AND WHEEL AND BRAKE FAILURE.
(3) Make sure that the spacer is installed on the axle.
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S 644-013
(4) Lubricate the axle with grease in the area where the wheel bearings touch the axle.
NOTE: Do not lubricate the axle surfaces between the wheel
____
bearings.
S 644-014
(5)
Lubricate the wheel bearings with grease.
S 424-015
(6)
Put the wheel and tire assembly (1) on the dolly and slide it on the axle.
S 424-017
(7)
Align the tang and put the axle washer (2) on the axle.
S 644-018
(8)
Lubricate the axle threads with grease.
S 424-019
(9)
Use the procedure that follows to install and tighten the axle nut (6):
(a)
Put the nut (6) on the axle and tighten it by hand until you can not turn it.
(b)
While you turn the wheel, tighten the axle nut to 235-260 pound-feet.
(c)
Stop the wheel.
(d)
Loosen the nut to 10-20 pound-feet.
(e)
While you turn the wheel again, tighten the nut to 65
pound-feet minimum.
(f)
Continue to tighten the nut as necessary to align the lockbolt holes, but do not exceed 115 pound-feet.
S 424-020
(10)
Install the two lockbolts (3) through the axle nut (6), the axle, and the axle bushing. Tighten the lockbolts (3).
S 614-021
(11)
Make sure that the tire is inflated to the correct pressure (AMM 12-15-03/301).
(12)
Lower the nose gear with the jack (AMM 07-11-03/201).
(13)
Remove the jack (AMM 07-11-03/201).
S 584-022
S 584-023
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757 MAINTENANCE MANUAL 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 3(78)
