S 014-005
(4)
Remove the control panel of the nose wheel well (Fig. 401).
(a)
Disconnect the stirrup from the housing bracket of the runway light and the stirrup support bracket.
(b)
Remove the attaching clamps of the control panel from the lower tripod brace.
(c)
Remove the tie-rod from the lower tripod pin.
(d)
Attach the control panel to the shock strut.
S 014-006
(5)
Remove the bullnose deflector assembly from the upper tripod brace (AMM 32-21-07/401).
E.
Remove the brace assembly of the lower tripod on the nose landing gear.
S 034-007
(1)
Remove the pin assembly of the lower tripod from the attach lug of the outer cylinder (Fig. 402).
(a)
Remove the pin lockbolt of the lower tripod.
(b)
Remove the special nut and the washer.
(c)
Hold the brace and pull out the pin assembly.
S 034-008
(2)
Remove the apex pin assembly of the tripod brace.
(a)
Remove the apex pin lockbolt.
(b)
Remove the special nut and the tang washer and install the pin thread protector.
WARNING: MAKE SURE YOU HOLD THE DRAG STRUT ASSEMBLY AND THE UPPER
_______ TRIPOD BRACE BEFORE YOU REMOVE THE APEX PIN. THE UPPER TRIPOD BRACE WILL MOVE DOWN IF YOU DO NOT HOLD IT CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE EQUIPMENT
(c) Hold the upper and the lower tripod braces.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-21-05
ALL ú ú 01 Page 403 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL DRAG STRUT LOCKBOLT UPPER TRIPOD BRACE
SPECIAL NUT
TANG SEE WASHER
A
DOOR ROLLER (2 PLACES) SEE B (REF)
FWD
LOWER TRIPOD LOCKBOLT BRACE
SPECIAL
NUT
LOWER
TRIPOD
BRACE
A
STIRRUP SUPPORT BRACKET OUTER O-RING
TRIPOD
APEX
BOLT LUBE INSERT
CYLINDER
LOWER
TRIPOD
BOLT
O-RING LUBE
INSERT
O-RING
FWD
B
Tripod Brace Assembly Installation
Figure 402
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-21-05
ALL ú ú 01 Page 404 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(d) Pull out the apex pin assembly.
S 024-009
(3)
Remove the brace assembly of the lower tripod from the airplane.
F.
Remove the brace assembly of the upper tripod.
S 034-010
(1)
Remove the brace pin assembly of the upper tripod (Fig. 403).
(a)
Remove the pin lockbolt.
(b)
Remove the special nut and the tang washer.
(c)
Hold the upper tripod brace.
(d)
Pull out the pin assembly.
S 024-011
(2) Remove the upper tripod brace from the airplane.
TASK 32-21-05-404-012
3. Nose Landing Gear Tripod Brace Assembly Installation (Fig. 401)____________________________________________________
A. Special Tools and Equipment
(1)
PRE65B01202-1 Apex Pin Thread Protector
B.
Consumable Materials
(1)
B00722 Solvent - PD-680 or equivalent cleaning solvent
(2)
A00226 Compound - Sealing, BMS 8-45 (Putty Tamperproof)
(3)
D00633 Grease - BMS 3-33 (preferred)
(4)
D00013 Grease - MIL-G-23827 (optional)
C.
References
(1) 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 起落架 LANDING GEAR 3(144)
