500
32-21-0 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 15/80
M. Disconnect and plug hydraulic lines from each swivel (3) on swivel bracket (1) (Detail A).
NOTE: Tag and identify swivel ports and tubes in matched pairs to prevent crossing tubes during installation.
N. Remove aft access panel from right nose wheel well bulkhead to gain access to right trunnion pin jamnut (12).
O. Actuate TAXI light toggle switch on P6 panel in control cabin to OFF.
P. Remove lockwire from nose gear taxi light electrical connection on inboard side of right nose gear wheel well bulkhead above trunnion (4) and disconnect electrical plug.
3. Remove Nose Landing Gear (Fig. 401)
A. Remove lockwires from jamnut and lockwasher (11) on left and right trunnion pins.
B. Remove jamnut and lockwasher from outboard end of left and right trunnion pin (View 1).
C. Deflate nose gear shock strut through air valve at top of shock strut by removing cap and loosening nut below 2 turns maximum until shock strut restrainer can be installed on torsion links.
(1) Clear equipment and personnel from beneath airplane.
WARNING: DO NOT LOOSEN VALVE BODY UNLESS SHOCK STRUT IS COMPLETELY DEFLATED. AIR PRESSURE CAN BLOW VALVE BODY OUT, CAUSING INJURY TO PERSONNEL. CHECK THAT NO PERSONNEL OR EQUIPMENT ARE UNDER AIRPLANE BEFORE SHOCK STRUT IS DEFLATED. FAILURE TO COMPLY MAY RESULT IN INJURY TO PERSONNEL OR DAMAGE TO AIRPLANE.
D. Install shock strut restrainer (10)(Detail C).
NOTE: Restrainer will prevent inner cylinder from extending when airplane is jacked.
E. Jack airplane nose until nose gear clears ground (Ref Chapter 7, Jacking Airplane). Lower tail support jack as nose is raised.
F. Disconnect nose gear drag brace lower link (8) from shock strut fitting (5) at bottom of drag brace assembly and let drag brace hang (Detail B).
G. Remove lockwires from spring pins (14), which retain trunnion pin lockpins (15) on each side of each trunnion pin (View 1).
H. Remove trunnion pin lockpin from each side of each trunnion pin.
I. Jack nose gear with axle jack as necessary to remove weight of nose gear for trunnion pin removal.
Feb 15/79 32-21-0 Page 403 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Nose Gear Installation 500
32-21-0 Page 404 Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/84
500 Nose Landing Gear Installation
Jun 20/84 Figure 401 (Sheet 2) 32-21-0
Page 405
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Nose Gear Installation 500
32-21-0 Page 406 Figure 401 (Sheet 3) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 15/67
500 Nose Gear Sling Nov 15/78 Figure 402 Page 406A/406B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
J. Support nose gear and remove trunnion pins with trunnion pin puller.
K. Lower axle jack and roll gear from area. If gear requires hoisting for transport, install sling per Fig. 402.
L. Remove shock strut restrainer (10) from nose gear (detail C).
4. Prepare to Install Nose Landing Gear
A. Check distance between nose gear trunnion bearings in wheel well structure.
(Ref 32-21-51 R/I).
B. Check that trunnion pins, coated with corrosion preventive compound, are partially inserted in respective trunnions (4 and 16) but not protruding beyond outboard edge of trunnion on gear.
C. Ascertain that piston position cable pulley bracket is installed.
D. Install shock strut restrainer (10).
E. Mark a reference line through center of each trunnion pin lockpin hole to inboard end of each trunnion pin (20).
F. Position nose gear in vertical position for installation to be jacked and trunnion pins inserted.
5. Install Nose Landing Gear (Fig. 401)
A. Support gear and jack with axle jack to insert trunnion pins in respective spherical bearings (13) on each side of nose gear wheel well.
B. Jack gear to proper height and tap trunnion pin into place in each trunnion and trunnion support spherical bearing (13) then remove axle jack.
NOTE: Nose gear must be lifted into position with gear trunnion axis parallel to trunnion bearing axis.
C. Ascertain that trunnion pin lockpin holes are in alignment with mating holes in each trunnion.
D. Install trunnion pin lockpins.
(1)
Clean trunnion pin lockpins with naphtha.
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本文链接地址：737 AMM 飞机维护手册 起落架 LANDING GEAR(59)
