737-300 400 500 AMM 飞机维护手册起落架 LANDING GEAR 1(52)_航空信息_民用航空_通用航空

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assembly in position.
(b) Loosen the forward trunnion bearing assembly (3), (Fig. 407).
(c) Move the trunnion link (9) as necessary until the lug holes are
aligned with the lug holes of the shock strut (Fig. 406).
(d) Put the actuator walking bear arm (2) in position between the
lugs of the shock strut (3), (Fig. 406).
NOTE:____ Make sure the curved lugs of the walking beam arm
are in the inboard direction.

WARNING: USE NITRILE GLOVES FOR SKIN PROTECTION AGAINST BMS 3-27
_______ (MASTINOX 6856K). IF MASTINOX GETS ON YOUR SKIN, IMMEDIATELY REMOVE IT WITH WATER. IF THIS MATERIAL GETS IN YOUR EYES, IMMEDIATELY FLUSH YOUR EYES WITH WATER AND GET MEDICAL AID. THIS MATERIAL CONTAINS VERY POISONOUS AND FLAMMABLE AGENTS WHICH CAN CAUSE INJURIES TO PERSONS.
CAUTION: REMOVE UNWANTED MASTINOX FROM SURFACES WHICH WILL BE
_______ LUBRICATED. IF YOU APPLY MASTINOX TO JOINTS THAT TURN, FAILURE OF THE LANDING GEAR TO EXTEND OR RETRACT COULD OCCUR.
(e) Apply mastinox 6856K to the non-lubricated outer surfaces of the trunnion link pin (9) pin immediately before installation (AMM 12-21-11/301).
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A 737-300/400/500MAINTENANCE MANUAL
(f) (g) Apply a layer of grease to the lubricated surfaces of the trunnion link pin (9) immediately before installation.Install the thread protector (8) on the trunnion link pin (9).
CAUTION:_______ IT IS IMPORTANT TO INSTALL THE TRUNNION LINK PIN (9) BY HAND TO MAKE SURE THAT AN AXIAL PRELOAD IS NOT INDUCED IN
THE TRUNNION BEARINGS. BEARING PRELOAD WILL CAUSE TOO
MUCH FRICTION AND CAN RESULT IN GEAR RETRACTION AND
EXTENSION DIFFICULTIES.
(h) (i) (j) From the outboard side, install the trunnion link pin (9) by hand through the forward trunnion link (7), the lug of the shock strut (3), and the actuator walking beam arm (2), (Fig. 406).Turn the trunnion link pin (9) to align the hole of the pin locking lug with the lockbolt (4) in the forward trunnion link (7).When the trunnion link pin is fully engaged, remove the thread protector (8).
CAUTION:_______ LOOK FOR A BLACK MARK ON THE YELLOW BACKGROUND OF THE TRUNNION LINK PIN. THIS SHOWS THAT THE THREADS HAVE BEEN
REWORKED. A TRUNNION LINK PIN WITH UNDERSIZE THREADS MUST
BE USED ONLY WITH A SPECIAL UNDERSIZE TRUNNION PIN NUT.
MAKE SURE THAT STANDARD NUTS ARE NOT USED ON UNDERSIZE
THREADS.
ú (k) (l) Install the special washer (5A), and the trunnion pin nut (6).Tighten the the trunnion pin nut by hand.
ú S 424-223
ú
ú
ú ú CAUTION:_______ MAKE SURE THAT FORWARD TRUNNION BEARING ASSEMBLY AND LOCKINGKEY ARE CORRECTLY MATCHED SET (AIPC 32-11-83, FIG. 1).MISMATCHED BEARING ASSEMBLY AND LOCKING KEY CAN RESULT IN
ú DAMAGE TO THE BEARING ASSEMBLY.
ú
ú ú ú (13) Install the locking key (2) of the forward trunnion bearing (3)with the two lockbolts (10) and their washers (11) and nuts (12)(Fig. 407).
NOTE:____ You can install the locking key in one of the two positions to align the tabs with the slots.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 424-117
(14)
Install the anirotation bolt (1), (Fig. 406).

(a)
Align the holes in the actuator walking beam arm (2) with the hole in the trunnion pin link (9).