3. Prepare for Removal of Main Gear
A. Check that landing gear ground lockpins are installed in all gear.
B. Extend flaps to gain access to aft side of main landing gear support beam.
C. Depressurize hydraulic systems A and B.
D. Operate brakes eight times to depressurize brake accumulators.
E. Open all landing gear circuit breakers on P6 panel.
F. Remove hydraulic access panel 8401 left or 8501 right from underside of wing.
G. Remove main gear shock strut doors (Ref 32-13-11, R/I).
H. Deflate and compress shock strut by removing dust cap from charging valve and loosening release nut one or two turns (Fig. 401).
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 PERSONNEL AND EQUIPMENT ARE CLEAR OF AIRPLANE AS AIRPLANE DESCENDS.
I. Install main gear oleo lock assembly to keep shock strut compressed.
J. Jack airplane until tires just make sufficient contact to prevent wheels rotating. Jacking height will be about 4 inches (Ref Chapter 7, Jacking Airplane).
K. Mark tire foot print on ground by drawing line around tire contact area.
L. Deleted.
Shock Strut Air Charging Valve 500
32-11-0 Figure 401 Feb 20/87
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
4. Remove Main Landing Gear
A. Provide access to aft trunnion bearing. (See figure 402.)
(1) Remove grease reservoir (3) and seal ring (11).
B. Remove hydraulic lines from drag strut.
(1)
Disconnect hydraulic lines from upper side of trunnion link hydraulic swivel ( 11, figure 403), and from connection on wheel well ceiling. Drain hydraulic lines into container.
(2)
Remove trunnion link hydraulic swivel (11) and door actuation fitting (13).
(3)
Undo all clamps (8) holding hydraulic lines (7) to drag strut.
(4)
Disconnect hydraulic lines from bracket (3) on lower drag strut, and from connection (6) on main gear damper (5). Drain lines into container.
(5)
Remove all hydraulic lines from drag strut. Plug and cap all lines and connections.
Feb 15/73 32-11-0 Page 402A/402B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
543 Aft Trunnion Bearing Installation
Feb 15/73 Figure 402 32-11-0
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Main Gear Components 500
32-11-0 Figure 403 Feb 20/91
Page 404
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C. Remove electrical harness.
(1)
Disconnect harness (9) near top of shock strut, and at axle entry point.
(2)
Undo clamps (8) for electrical harness (9) on upper drag strut.
(3)
Coil harness and tape to lower drag strut.
(4)
Disconnect electrical harness (9) (with links [4]) from underside of torsion links, and at main gear damper (5).
(5)
Coil harness and tape to lower drag strut.
D. Remove the actuator assembly of the main landing gear as follows:
(1)
If it is necessary, remove the actuator assembly (AMM 32-32-11/401).
NOTE: If the stabilizing beam for the main landing gear was removed to make the removal of the actuator assembly easier, install the stabilizing beam again.
(2)
If it is necessary, disconnect the actuator assembly from the walking beam arm and the trunnion pin (AMM 32-32-11, R/I).
(a)
Attach the cord to the actuator assembly.
(b)
Move the actuator assembly away from the main landing gear.
500 Actuator, Walking Beam and Beam Hanger Installation
Feb 01/96 Figure 404 32-11-0
Page 405
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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