A320飞机维护手册 AMM LANDING GEAR 起落架1(96)

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 Each main fitting has a spare-seal activating-valve. This valve can isolate the bottom gland seals if a leak occurs. The activating valve is on the barrel of the main fitting, adjacent to the gland-housing assembly. When the activating valve closes, it isolates the bottom set of seals (from the fluid pressure).
 The spare seal operates when you remove the cap screw and turn the threaded valve-stem in. This puts the ball valve on its seat, which isolates the bottom gland seals and causes the top gland seals to seal the joint.
 D. Torque Link Damper
 (Ref. Fig. 013)
 The torque-link-damper is a spring-centered, two-way hydraulic unit, which has its own (pressurized) hydraulic reservoir. Its function is to decrease the landing vibrations through the torque links.
 The torque-link damper has a damper body with a reservoir at the top and a check valve at the bottom. A bleed screw and a bleed plug are installed in the top of the reservoir. The torque-link damper is on the bottom of the upper torque-link and operates through the apex bolt from the lower torque link.
 The hydraulic fluid contents of the damper are shown by the extension of the reservoir when it is pressurized. When the contents are correct, the words 'FULL' and 'REFILL' are in view. If the contents are not correct, only the word 'REFILL' is in view.
 E. Side Stay Assembly 2505GM (2506GM)
 **ON A/C 001-003, 051-052,
 (Ref. Fig. 014)
R **ON A/C 004-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 (Ref. Fig. 014A)
 1EFF : ALL 1 32-11-00Page 32 1 1 Aug 01/05 1 1 1CES 1

 MLG Torque-Link Damper Figure 013
 1EFF : 1 1R 1CES  ALL  1 11 1 32-11-00 Page 33 May 01/05

 

 MLG Side Stay Figure 014 
R 1EFF : 1 1 1CES  001-003, 051-052,  1 111 32-11-00 Page 34 May 01/05

 

 MLG Side Stay
 Figure 014A

R 1EFF : 004-049, 053-099, 101-149, 151-199, 1 32-11-00Page 35 1201-299, 301-399, 401-499, 1Aug 01/05 1 1 1CES 1

 

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,

 (Ref. Fig. 015)
 **ON A/C 301-399,
 (Ref. Fig. 015A)
 **ON A/C ALL
 (Ref. Fig. 016)
 The side stay assembly is between the rear spar of the wing and the main fitting of the MLG leg. A cardan (universal) joint connects the side stay assembly at each position. These joints let each connection point turn around two axes.
 The primary components of the side stay assembly are:
 -
a basic side stay

 -
a lock stay

 -
a lock-stay actuator

 -
two hydraulic hoses (from the Green hydraulic system to the lock-stay actuator)

 -
two lock springs

 -the proximity sensors and their related targets.
 (1)
 Basic Side Stay

 The basic side stay has two links with a central pivot pin. The upper link is an 'H' section member that has bushed lugs. These attach to the lock-stay actuator, the lock springs and the lock stay. The lower link is also 'H' section, that has forked ends. The cardan joints connect the side-stay to the wing structure and the main fitting.

 (2)
 Lock Stay

 The lock stay gives the mechanical downlock for the main landing gear. It has two 'H' section links that move around a central pin. The forked ends attach the lock stay to the basic side-stay and to the main fitting.
 The lower link of the lock stay has bushed lugs for the connection of the downlock actuator. The two pairs of lugs extend from the end of the lower link that connects to, and operates, the lock springs.
 1EFF : ALL 1 32-11-00Page 36 1 1 Aug 01/05 1 1 1CES 1

 MLG Side Stay - Lower Cardan Joint
 Figure 015

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-11-00Page 37 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1

 MLG Side Stay - Lower Cardan Joint
 Figure 015A 
R 1EFF :  301-399,  1  32-11-00 Page 38 
1  1  May 01/05
 1  1
 1CES  1

 

 MLG Lock-Stay Actuating-Cylinder Figure 016
 1EFF : 1 1R 1CES  ALL  1 11 1 32-11-00 Page 39 May 01/05

 

 The upper link of the lock stay continues below the center pivot to give an overcenter stop. This gives an overcenter, geometric lock if there is a failure of the internal stop of the downlock actuator.
 Two proximity sensors and their related targets are on the brackets. Other brackets on the upper link hold the electrical harnesses that connect to these proximity sensors.
 (3)
 Lock Springs

 A pair of tension springs are in the bottom channel of the upper side stay. They attach between the upper end of the basic side stay and the lugs of the lock stay. The lock springs have an eye-end fitting at each end with a plain bush. The bushes turn on the attachment pins at each end. During the extension cycle the lock springs move the lock stay to an overcenter position (and keep it there).
　
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